Rob Walker Posted May 21, 2004 Share Posted May 21, 2004 We were experiencing poor grip on the Emerald rolling road yesterday whilst trying to map my new car. Dave Walker suspected that I was running with far too much neg camber 2 degrees. Does anyone know what is the reason for running any neg camber at all with radials when the rear axle be it live or De Dion is rigid and free from roll induced camber changes. Link to comment Share on other sites More sharing options...
Stuart Faulds Posted May 21, 2004 Share Posted May 21, 2004 Primarily to take account of tyre roll, but you're unlikely to generate those sort of loadings on the road. Link to comment Share on other sites More sharing options...
Joe 90 Posted May 21, 2004 Share Posted May 21, 2004 Unless they are very low profile, even radials experience sidewall flexing. Two degrees seems quite a lot though. SEP field working, not spotted in 100,900 miles. Some photos here Link to comment Share on other sites More sharing options...
Mike Bees Posted May 21, 2004 Share Posted May 21, 2004 I run > 2deg. neg. on the rear (about 2.5 I think), it's definitely better like that on the 'orrible list 1A tyres I use. Mike Link to comment Share on other sites More sharing options...
Rob Walker Posted May 21, 2004 Author Share Posted May 21, 2004 The car feels nice, just that my Ears came with the uprated rear brake package aka off the JPE and are stamped 2 degrees and thats what they measured at Uncles Daves. The standard current Ear`s are either 0 for slick or ACB fittment or 1.5 degrees for radials. The big question is is that extra half degree just too much and am I sacrificing too much straightline grip??? Edited by - Rob Walker on 21 May 2004 20:00:41 Link to comment Share on other sites More sharing options...
Stuart Faulds Posted May 21, 2004 Share Posted May 21, 2004 Ears for standard brakes are 0.25 and 1.5, but if you've got uprated rear brakes then you're limited to 0.25 or 2. Without knowing what tyres you're using, how you drive and how much road or track use the car gets, it's impossible to make a recommendation. Link to comment Share on other sites More sharing options...
Joe 90 Posted May 21, 2004 Share Posted May 21, 2004 *confused* Why do brakes affect the choice of ears 🤔 I wouldn't worry too much about straight line performance because the distortion the rolling road puts into a tyre is much more of a problem than when you're on real tarmac. SEP field working, not spotted in 100,900 miles. Some photos here Link to comment Share on other sites More sharing options...
Rob Walker Posted May 21, 2004 Author Share Posted May 21, 2004 Oliver, The uprated brake calipers are mounted radially from the top edge of the ear as opposed to side in the case of the standard brake installation. Link to comment Share on other sites More sharing options...
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