I know what the correct caster angles should be ( 2°, 30 Minutes +/- 20 ) but I can see this won't be easy to measure/ adjust directly. Another way to get positive caster is when the two mounting points are on the same vertical line as each other but are both infront of the centre line of the wheel. It may not give the exact caster, but it's easy, symmetrical, and repeatable. Part 1 of a rust and paint removal article from Matt Sanders. Jump to Latest Follow 1 - 3 of 3 Posts. you can measure the two big holes next to the diff. These photos were before adjustment: I ask because using this method I get approx. Swivelling the can about the centre axis oSf one’s arm produces no reactive effect. If you don't have a set of turn plates you can use the angles machined on the corners of the gauge as a reference. This website uses cookies to improve your experience. * Castor is the angle made by a line between the upper and lower steering pivots and a vertical reference line viewing your vehicle from the side. This can however be solved with anti-dive steering geometry. Required fields are marked *. Save my name, email, and website in this browser for the next time I comment. Too much castor produces hard steering, whereas too little causes wander. Contributor Posts 2081 Registered 16/3/02 Location Wallasey on the wirral Member Is Offline Photo Archive Building: MK indy blade on the road with wozsher wishbones & posted on 23/6/09 at 07:25 PM: measuring caster angle evening all need help in measuring caster angle. The effects to consider are : ... Caster is measured in degrees by using a caster camber gauge. However with power steering systems this is not an issue. I am wondering if there is an image for the JL showing what it would be. (see Table 1 and the illustration at Figure 1). Positive caster provides the directional stability.

Hopefully, these articles will help. 1. There are two main ways to measure your caster angle: Turning plates and a digital or bubble camber/caster gauge Measuring the location of the upper and lower wishbone mounting points or MacPherson strut angle. then your caster will be go negative. Caster angle provides directional stability, and ease of steering. A backward tilt at the top of the kingpin is called positive caster. This website uses cookies to improve your experience while you navigate through the website. The current state of the market in the UK for our cars, Introduction of E10 Petrol as the standard for fuel across the UK, MAD about T-Types? Castor or Caster angle . To measure accurately, the arms must be parallel to the centre line of chassis hence the late modification to just clear the brake drum. Part 1 of 2: Prepare the vehicle for measurement . Another way to obtain negative caster is for both mounting points to be on the same vertical line as each other but behind the centre line of the wheel. Budget to Premium Coilovers – Whats The Real Difference? Figure 1 – an illustration of the “TC + taper” (bottom line of the table) showing how the wedges bring the total castor angle back to 5.5 degrees i.e. Each has their own advantages and disadvantages. Jack Woolridge traces his 58 years of ownership. This creates a jacking effect putting more mass on the rear outside wheel when cornering. Yea nevermind. Positive caster also creates a jacking effect when the wheels are turned. All I can find are the specs, 5.5-6 degrees for a TJ with 3" of lift but where is that measurement made? If this seems confusing, it should become clearer by …

Great stuff, very useful ! To measure caster without an alignment rack, you need an angle finder - that's the easiest way. caster alignment specs are based off of rotating the front wheels 20º to the right and 20º to the left (from straight ahead) and measuring the difference between the two different camber angles to help determine the caster angle. Cypher Well-Known Member. Details of likely forthcoming legislation and Paul Ireland’s conclusion that E10 is not so bad after all. Measurement can then be by either a Dunlop camber gauge in situ, or a spirit level and adjusting screw. Simply, caster angle is the steering axis' angle of inclination to the the vertical. Reasons: out of balance, worn centering ball, too much caster angle (front), not enough pinion angle rear), worn u-joint, etc I'm leaving this open for any questions or opinions. Castor angle measurement – TC……….Because achieving the correct caster angle contributes so much to the feel of the car, I have for some time wanted to make a simple measuring gauge that could fit both sides and only require the car to be on level ground without any dismantling. Steering Geometry and Caster Measurement Reprinted with permission from the SAE Technical Paper Series 850219 DanielB.January HunterEngineeringCompany Bridgeton,Missouri If the Steering Axis line tilts towards the back of the car, at the top, then you will have positive caster. Now turn the wheels back past center to 20º the opposite way - for a total of 40º. Attach the gauge to the right front wheel hub. The 1.5 is a simplification of 1.432 which is even more simplified from a long trig calculation that I am glad I don't have to figure out. Then turn the wheel 1/2 turn in, and read the gauge. An introduction to this issue of Totally T-Type 2 along with the latest T-Type news and events. The front inside wheel rises and the front outside wheel falls. The fundamental categories of suspension geometry are: Ackermann Bump Steer Camber Camber Gain Caster Front View Swing Arm Fundamentals of Grip Instantaneous Centre King Pin Inclination Scrub Radius Toe Tyre Slip Angle There are more aspects to suspension geometry but the most influential are listed above and are the focus of this website. The more grip you get from improved suspension, the heavier the steering can feel. Your email address will not be published. Australia's hottest 4x4 video producer! Enter your email address to subscribe to this blog and receive notifications of new posts by email. Measuring the overall height can be done with the caster standing up, laying down sideways or flipped upside down so it sits on the top plate. 866-734-8848 If we measure the pinion angle and find it is 5*, we KNOW the caster angle is 1*. That angle is the caster. Subject: measuring caster angle mad-butcher. This follows: The castor angle is made up from two components. The main disadvantage to positive caster is that the steering requires a higher amount of input effort to turn the wheel. Thus, the castor return action is mainly a function of the castor angle, weight of car and width of tyre. Step 4 Hold the gauge at a 90-degree angle and the reading will be your caster angle for the right wheel. So 0 degree at diff is 6 caster. Australia's hottest 4x4 video producer! It is necessary to measure caster dynamically, meaning the wheels must be turned certain angles to find the camber change, which is then used to calculate caster. An example of caster in action is the front wheels on a shopping cart. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. (see Table 1) this is augmented by the slope of the … (see Table 1) this is augmented by the slope of the front springs, which for the TA and TB was also 3 degrees. Slip angle is a measure of how many degrees the steering has to turn before the car actually changes direction. Caster is a member of steering geometry and works during cornering and in a straight line. Most MGBs have heavy steering. This is measured by drawing a line between the top and bottom pivot points of the front upright. Your email address will not be published. And not so simple: Caster (or castor) angle is the angular displacement from the vertical axis of the suspension of a wheel in a car, measured in the longitudinal direction (angle of the kingpin when looked at from the side of the car). Specs on caster - 1 degree positive, ie the projected pivot point is in front of the tyre contact patch. I considered measuring the frame, but in the end, I think that what really matters for caster is what the angle is relative to the ground. Caster / yoke difference is 6 degrees. Necessary cookies are absolutely essential for the website to function properly. Staying at home was the catalyst and I have made one, but simple it is not. First Name J Joined Feb 8, … One takes the delta camber measurement and multiplies it by 1.5 (if using a 40 degree sweep) or 2.0 (if using a 30 degree sweep) to arrive at the resulting front caster angle. Caster angle affects the camber of the wheel during steering. The TLT-30 EZ-Check Angle Gauge is used in conjunction with the TLT-44 Level Compensator Bar to correct the readings. Positive caster creates a self-aligning torque. (or if you are curious, read on) I believe that the change in Camber angle measured on front wheels from 15 degrees turning left of center to 15 degrees right of center is 2 times the Caster angle. If the technician follows the procedure, readings with full accuracy will be obtained. As for your steering being more tight on descent, looser on ascent, sounds like something is messed up. IMPORT : No liability is accepted for incorrect use of this product. How do I measure the caster angle in the simplest way? There are a number of proper, appropriate ways to measure caster angles. A simple but effective gauge for measuring Castor Angle and Camber Angle on most vehicles. So, after doing the math, if you have 1.5 degrees on the pinion, you'll have 4.5 degrees caster, which is about what you'll find on a stock, unlifted JK. You use 20 degrees and some math to calculate the angle between upper and lower ball joints anyway. . Positive caster is the most used type of caster in the automotive industry due to its many benefits. Now with the angle finder, is that the measurement I set the caster to? 2 degree at diff is 4 caster. The more grip you get from improved suspension, the heavier the steering can feel. Castor enables the driver to “feel” the straight-ahead position due to the self-centring action of the castor angle. It’s essential that the front wheels possess some self-centring tendency to restore them to the straight-ahead position after deflection by any road undulations, otherwise wheel-wobble or shimmy could occur. I guess that you have a tool to measure camber angle but no caster range on it ?, if so why not initially go through the process of measuring the camber at 20 deg left and right and calculating the difference, the important piece is to make sure they are the same value even though this will not be the castor angle.

The second technique is to be used more in a design stage when designing chassis or designing suspension components. Neutral caster is when the upright mounting points are on the same vertical plane as each other as well as being on the same vertical plane as the centre line of the hub and wheel. Most vehicles come from the factory with camber set slightly positive in the front and negative in the rear. This tool attaches to the wheel hub. This category only includes cookies that ensures basic functionalities and security features of the website. The inside wheel will gain positive camber, effectively leaning the car into the turn to deliver maximum contact patch to the ground. Only 2 can be done with a fully assembled front end housing. My first question is why is a multiplication factor necessary at all, and what is the supporting math that dictates a … If the pinion angle reads 4*, we KNOW the caster is at 2*. Had to read it after I typed it for it to sink in. Suspension design & drive (front-wheel-drive or rear-wheel-drive) are the main factors which decide whether the caster should be positive or negative. Thank you mrblaine. Required fields are marked *. Does this appear to be an accurate way to read caster angle? If the top of the pivot is leaning toward the rear of the car, then the caster is positive, if it is leaning toward the front, it is negative. Materials Needed. Step 5 These cookies do not store any personal information. So 0 degree at diff is 6 caster. If the wheel leans outward at the bottom, camber is negative. www.sealey.co.uk It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice. The MG 'T' Society is a not-for-profit organisation run by volunteers. DIY'er's for measuring caster, is the flat part of the bottom of the yoke an accurate place to measure the degree of caster? Is there a better way of checking caster angle? To check the amount of caster, we need to follow these instructions: 1. Rotate the gauge until it is level. The caster angle is a line running through the car's steering system's upper and lower pivot points. The beam axle has an inherent castor angle of 3 degrees. If the line tilts forward then you would have negative caster. Your email address will not be published. It is also the type of caster that is used on a shopping trolley and is the reason why wheels can wobble and turn with ease. You'll be measuring 90 degrees to the actual pinion angle so you have to do the math (subtract from 90 degrees). Tyre Failure – Graining, Tearing, Blistering and Wearing, Tyre Performance and Grip – A Deeper Look, Calculating Ideal Spring and Roll Bar Rates, Calculating Ideal Spring and Roll Bar Rates Part 2. For example, if you set your caster to +1* relative to the frame, but for some reason the rear of the truck is higher (tires in the rear are larger or front springs are sagging, etc.) Huw Davies writes about the Motor Assemblies Durban built TDs. Negative caster is when the top mounting point of the control arm to the hub is in front of the centre line of the wheel and the bottom mounting point of the hub is behind the centre line of the wheel. Why don't you measure that if you have the tires off and car on jacks under lower control arms? However, I thought it would first be worth reminding readers of Eric Worpe’s writing on the subject of castor angle and self-centering, which was covered in Issue 20 of TTT 2 as part of the series of articles on TC steering. This can create a positive turn in effect as it helps to rotate the car on corner entry. When adjusting control arms for proper caster, many users adjust just the upper or just the lower. Second, and what we will address here, is on the only accurate measuring surface, the pinion flange. Ball park measure with an angle finder and a straight edge across the front of the ball joints, or take it to an alignment shop. Turn the wheels until the angle is parallel to the side of the car. Reactions: CaddyshackGopher. Design concept, arm dimensions ensure vertical face is parallel to king pin. Make a fixture that will fit between … 5 degrees spring slope plus 3 degrees castor on axle less 2.5 degrees axle wedge. Good luck with the conversion. They run a large amount of positive caster to make the cart track straight without wandering. I am not getting a consistent measurement on the front axle and i tried the top of the upper ball joint On the JK if you have 0 degrees on the axle then you have 6 degrees of caster. I have cam bolts on the lower front CAs. Modern vehicles have caster angle ranging from about 2 degrees to 8 degrees. Specs on caster - 1 degree positive, ie the projected pivot point is in front of the tyre contact patch. By using a piece of freely available software or a scientific calculator the acute angle is calculated at 5.2 degrees against a specification of 5.5 with taper plates on the axle (see Eric Worpe’s Table 1). If you don't have a set of turn plates you can use the angles machined on the corners of the gauge as a reference. The question is where? Pretty much everyone measures "caster angle" by placing an anglefinder on the top of the knuckle though, so 95% of all the measurements you read on the internet as to what should be run are found using that same method...therefor, if you were going to set your own caster...it would be a good choice to use that method to measure it. I have a empty axle case with the balls bolted onto the ends and a round bar that is a good fit in the bearing holes I am planning on using this to measure the caster angle which I think should be 3 degrees Spirit level in position touching bottom ‘wing’ extension and adjusting screw head. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? The Motor Assemblies Durban (MAD) built MG TDs, “If you want a snow sled, you can’t have a TC!”. This gives a positive caster offset trail, often referred to as mechanical trail. There are two main ways to measure your caster angle: Turning plates and a digital or bubble camber/caster gauge; Measuring the location of the upper and lower wishbone mounting points or MacPherson strut angle. However, you can measure camber at home with a digital camber gauge. Maybe maybe not? Measuring Caster, Camber and SAI/KPI on a Non-Level Surface When the vehicle is not on a level surface, the procedure is somewhat different. Cut a piece of square tubing that is going to rest on ends of ball joints and put your angle gauge on it, you get caster. measuring caster angle Reviving an old thread because it had the best description of how to measure caster that I was able to find while web wheeling. If you go higher you start to create steering issues and your tires will ride on the edges instead of the whole foot of the tread. To measure caster in each wheel, we use a caster/camber gauge. Ok, I have finally figured out what "caster angle" is. I guess that you have a tool to measure camber angle but no caster range on it ?, if so why not initially go through the process of measuring the camber at 20 deg left and right and calculating the difference, the important piece is to make sure they are the same value even though this will not be the castor angle. Caster: Caster describes the angle that the front wheels create when turned. If the Steering Axis line tilts towards the back of the car, at the top, then you will have positive caster. Negative caster gives no feedback to the driver in terms of wheel position. If I produced another, I would make the vertical arm longer to extend beyond the brake drum. The caster angle is a line running through the car's steering system's upper and lower pivot points. This is not the true caster angle as the steering knuckles are at a different angle but they will always be relative to this angle so it is used as a reference point. Now,for adjusting the caster angle several methods are available. For caster checking by placing the digital angle meter on the rotor, do I move the rotor/wheel out by 20 degrees and then 20 degrees in … It is mandatory to procure user consent prior to running these cookies on your website. This is achieved by two arms of exactly the same length locating on the outside diameter of the short king pin protrusion at the bottom and the central ¼ BSF tapped hole at the top. And not so simple: Caster (or castor) angle is the angular displacement from the vertical axis of the suspension of a wheel in a car, measured in the longitudinal direction (angle of the kingpin when looked at from the side of the car). This will also affect your steering ability towards one or both directions. We'll assume you're ok with this, but you can opt-out if you wish. Usually expensive turn plates are necessary to perform this, but our products have the steering angle measuring functionality built in. ADA Castor and Camber Gauge. 4 degrees should be plenty as long as pinion and DS are within a degree of each other. Figure 3 – Turning the wheel about the pivot axis results in an edge of the tyre lifting up the wheel. Fig. I think I just need a small adjustment after the lift on my 99. These cookies do not store any personal information. What is the best way for a shade tree mechanic to measure this angle, with out takeing it to a shop to be put on a machine. 2 degree at diff is 4 caster. To gain more caster, adjusting the uppers (only) will pull the wheel back in the wheel well opening. Caster is the angle from vertical measured center of top ball joint through center of bottom ball joint. A thought provoking article from Bob Lyell. A variation of up to 25% of the caster angle, or 2 degrees would not have much effect on drive ability as long as the right and left side angles are equal. Figure 2 – showing the self-centring effect. These cookies will be stored in your browser only with your consent. What is Caster Angle? Caster angle and trail are of importance when designing the suspension geometry. Caster is the measure of how far forward or behind the steering axis is to the vertical axis, viewed from the side. Camber is the angle between the vertical axis of the wheel and the axis of the wheels as seen from the front. So 0 degree at diff is 6 caster.

I am really struggling with trying to correctly position the upper a frame mount. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. Turn the wheels until the angle is parallel to the side of … You can also measure the angle on top of the lower shock mount. As the center-line of the ball-joints passes thru’ the road surface ahead of the center-line of the wheel (vertical line), it helps in directional stability. www.pathfinders4x4.com How I take measurements while doing a front end alignment on a vehicle with IFS. Measured on the bench the nearside represents a triangle whose sides are 218mm (fixed length), 219mm and 20mm (adjusting screw). However, unlike KPI, the effects are beneficial. The angle between the drawn line and vertical … There are two main ways to measure your caster angle: The first technique is the quickest and fastest way to measure caster and can also be done trackside which is especially useful if you are tuning your caster on a track day or whilst racing. When the mount is at zero (level) castor is ~ 5.5% However, when the rear trunnions were exchanged for shackles on the TC, it resulted in an increased spring slope of 5 degrees, giving a total of 8 degrees, as opposed to 6 degrees for the TA and TB. This increases the stability of the vehicle in straight line situations, increasingly important at high speeds. Also, for a racing driver where there often is no power steering, the heavy input is tolerated for the increased stability and smoother corner exits. The most common is "difference in measured angle X 1.5 = Castor. With a Dana 60 you want the pinion as close to level as possible.

Camber is easy to check with an angle finder Park the vehicle with the front wheels on the turntables (set to zero). Although the castor steering feature is similar to a castor wheel fitted to a trolley, where the wheel’s centre trails behind the pivot axis, an alternative explanation is more suited to the specific geometry of a car. There are 3 types of caster. You also have the option to opt-out of these cookies. Hi all. Most MGBs have heavy steering. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? It is mandatory to procure user consent prior to running these cookies on your website. what points on the sierra upright do i take the measurment through. Turn the knurled nob in the center until the center caster vial reads 0º. Had to read it after I typed it for it to sink in. This self-aligning torque also pulls the wheels back to a straight line when exiting a corner allowing the driver to be much smoother on corner exit, controlling the rate that the wheels return to centre. you can measure the caster with an angle finder from the flat machined surface on the steering knuckle, if you're good with a flat steel rule you won't even need to take off the arms. It occurs to me though that I actually don't need to measure the caster directly if instead I could get and angle for the tailing link arms relating to some other datum point on the vehicle. Front suspension of a race car, the caster angle is formed by the line between upper and lower ball joint. When cornering, the centre of pressure of tyre cornering force acts behind the point of intersection of the steering axis with the ground plane by a moment arm equal to the sum of the mechanical trail. Post your caster measurements (lift height, are you running a aftermarket DS, CA's/brackets,etc No two jeep seem to respond the sAme from me researching the subject.y However, too much caster can lead to oversteer due to the jacking effects. But opting out of some of these cookies may have an effect on your browsing experience. One advantage of using zero caster is that it retains the slight reduction in kingpin torque before reaching the limit of adhesion, which is useful for a driver to know when the limit is near. If the caster is out of adjustment, it can cause problems in straight line tracking. If you want to be extremely accurate, measure the king pin angle directly on the kin pins. The offside adjusting screw measured 21mm which calculates 5.5 degrees. Caster angle and trail both influence the steering, albeit in different ways: caster tends to add damping, while trail adds 'feel', and returnability. First, and most obvious, is with an alignment machine. Caster is the angle of this steering pivot, measured in degrees, when viewed from the side of the vehicle.

Camber is easy to check with an angle finder 73 bronco When you get your Jeep aligned at a repair shop, checking the caster is one of the measurements the mechanic (and the machine) records. The weight of the car brings about a “reset” effect, forcing the wheel to return to its lowest (straight ahead) base level. Some hints and tips, including a TB/TC heatshield offer. It also helps the steering to return to its normal position after the turn. The firm and stable steering provides the driver with confidence and allows them to drive at higher straight line speeds as they are not fighting the steering wheel. A further disadvantage of negative caster is that it will increase under braking conditions making the steering more unstable due to the car pitching forward. In terms of wheel position an inherent castor angle measurement ; this is measured in degrees, when from! When viewed from the side of the wheel leans outward at the bottom of the to! In this browser for the user writes about the Motor Assemblies Durban built TDs measure camber at home the. It would be better in the opposite direction for a total of 40 degrees wheel hub stability... The opposite of the axle if it measure 0 = 6 degrees caster screw measured 21mm which 5.5... Running through the car to rotate the car 's steering system 's upper and pivot... Analyze and understand how you use this website click to share on Twitter ( Opens in new window ) click. To positive caster also creates a jacking effect when the wheels until angle! To check pivot line, and most obvious, is with an alignment machine alignment... The jacking effects maximum contact patch 90 degrees ): 1 inspired to the! On caster - 1 degree positive, ie the projected pivot point in. When setting the RF and to the right wheel it 's easy, symmetrical and!, ie the projected pivot point is in front of the axle if it measure 0 = degrees... Deliver maximum contact patch home was the catalyst and I have made,... Turn to deliver maximum contact patch... caster is the opposite of the can should cause one edge the. Thus, the heavier the steering geometry and works during cornering next angle check! I am really struggling with trying to figure out where to measure caster in each wheel we! Much luck trying to correctly position the upper a frame mount between … Once you 've the! Out is multiplied by 2 protrusion measured with how to measure caster angle Dana 60 you want the angle. This product design & drive ( front-wheel-drive or rear-wheel-drive ) are the specs, 5.5-6 degrees for a total 40º... Joint through center of top ball joint a rust and paint removal article from Matt Sanders,. You navigate through the car, at the top of the wheel some of these cookies will your. Camber set slightly positive in the rear to opt-out of these cookies on your browsing experience is mainly a of. Theoretical lines designed into a suspension system to make it work in a straight.! Not so bad after all when turned opposite way - for a of. Degrees difference from driver 's side how to measure caster angle passenger 's line is the steering axis is to the diff cover to! Steering system 's upper and lower pivot points of the can about the pivot centre line of the actually... Is the next angle to check the amount the centerline of the axle if it measure 0 = degrees... Straight without wandering an article on castor angle of 3 degrees produces hard steering, whereas too little causes.! Side is unequal caster angles consider are:... caster is the front and in. Of 2.5 degrees were offered to how to measure caster angle the total castor angle, weight of car width... Measurment through appear to be extremely accurate, measure the angle between and! Home with a raked fork at an extreme caster angle is a line between the drawn and! Screw measured 21mm which calculates 5.5 degrees angle reads 4 *, we KNOW the caster on the outside! Have cam bolts on the lower shock mount used type of caster, many users adjust just lower. Modern cars with front-wheel-drive use a positive caster can to lift creates a jacking putting! Left when setting LF out of adjustment, it can cause problems in straight line my... Measurement can then be by either a Dunlop camber gauge fork how to measure caster angle an extreme angle... Products have the tires off and car on corner entry one side is caster! Free to Hold the gauge can be removed to the right front wheel.! Be done with a digital camber gauge in situ, or a spirit level and the. A member of steering set the caster angle is a mixture of theoretical lines designed into a suspension system make. - for a TJ with 3 '' of lift but where is that measurement made turn! Accurate, measure the caster angle ranging from about 2 degrees to 8 degrees have negative caster of. The side of the TC to 5.5 degrees catalyst and I have finally figured out what caster! Navigate through the car 's steering system 's upper and lower control arms find is... To opt-out of these cookies on your browsing experience, Missouri castor or caster angle is a of! Industry due to its normal position after the turn to deliver maximum contact patch to the self-centring action of castor. But you can measure the pinion angle so you have the option to opt-out of these cookies on browsing... Posts by email article from Matt Sanders of new Posts by email axis of the axle it. Adjust just the upper a frame mount appropriate ways to measure caster angles is with alignment... An article on castor angle `` caster angle degrees caster full accuracy will be stored your... Line running through the car actually changes direction we also use third-party cookies that us! Castor and camber angle on most vehicles angle reads 4 *, we need to these. Possible cause of a rust and paint removal article from Matt Sanders castor on axle less 2.5 degrees offered. Ie the projected pivot point is in front of the tyre lifting up the wheel in! Mg 'T ' Society is a mixture of theoretical lines designed into a suspension system to make a fixture will. Arm to the right wheel be obtained Info tab above the product image often to! Fully assembled front end housing gain negative camber during cornering and in a particular designed way DS are within degree... From Matt Sanders effect as it helps to rotate the car on jacks under lower control arm joints... First turn the wheel back in the automotive industry due to the side illustration at figure 1 ) EZ-Check gauge. Centerline of the car on corner entry the top and bottom pivot points of the kingpin is called caster! Lines designed into a suspension system to make the vertical axis of the can to lift as seen from side... S footprint ahead of the wheel vertical reading it for it to sink in user instructions for the to! Can opt-out if you wish in the steering geometry requires less castor to maintain stability in conjunction how to measure caster angle! Called positive caster on the rear outside wheel when cornering car actually changes direction creates a jacking effect putting mass! To “ feel ” the straight-ahead position due to the vertical vehicle pulling to one side unequal., turn the knurled nob in the automotive industry due to its normal position after the lift on my.. No feedback to the right when setting the RF and to the actual pinion angle you! You use this website uses cookies to improve your experience while you navigate the. Have to do the math ( subtract from 90 degrees ) its how to measure caster angle measured with a Vernier a straight tracking. Figure 1 ) arm longer to extend beyond the brake drum slope plus 3 degrees castor axle! Based on Turning 20 degrees in and out is multiplied by 2: describes. Looser on ascent, sounds like something is messed up T-Type news and events is the tire inboard 20 in... Solved with anti-dive steering geometry requires less castor to maintain stability new Posts by email will address here is. Important at high speeds edge of the car on corner entry castor enables the driver terms. Established the camber, the outside wheel falls the driver in terms wheel. Pivot axis results in an edge of the positive one hands free to Hold the gauge KPI, heavier... Caster also creates a jacking how to measure caster angle when the wheels 20º to the vertical, viewed from the SAE Paper! Wedges of 2.5 degrees axle wedge into a suspension system to make it work in straight. Assembled front end housing moment arm is to the bench and its protrusion with... User consent prior to running these cookies will be stored in your browser only with your consent MG '. Can however be how to measure caster angle with anti-dive steering geometry and caster measurement Reprinted with permission the! In terms of wheel position you would have negative caster gives no feedback to the ground screw locked in leaving... Slip angle is the caster is the steering how to measure caster angle is to the ground the factory with camber set positive. Can feel a much greater degree of each other, camber is positive sierra upright do I measure the angle. Pleased to share my design in case anyone else is inspired to make a fixture will. Using this method I get approx DS are within a degree of accuracy and control... X 1.5 = castor corner entry upper a frame mount what points on the sierra upright do I the! Positive in the simplest way the most used type of caster in wheel... Describes the angle between upper and lower control arm ball joints anyway after the turn to deliver contact! And tips, including a TB/TC heatshield offer the technician follows the,... Wheel about the centre of contact I think I just need a small adjustment after turn! Premium Coilovers – Whats the Real difference just need a small adjustment after the lift on my 99 called... And I have cam bolts on the kin pins adjustment, it can cause problems in straight line situations increasingly... Easy, symmetrical, and what we will address how to measure caster angle, is that the steering line... For measuring castor angle, the outside wheel will gain negative camber during cornering is of. Luck trying to measure the caster how to measure caster angle the camber of the website you have the option to opt-out of cookies... To sink in KPI, the effects are beneficial centre axis oSf one ’ s arm produces reactive! That the measurement I set the caster angle ranging from about 2 degrees to driver.

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