Close, but the camber should be -2.5 to -4.0, and caster should be maxed out.....
Close, but the camber should be -2.5 to -4.0, and caster should be maxed out.....
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ITB Rabbit/ITA Miata
My BHF setup:
-3.5 LF camber -2.5~-3 RF camber.
zero front toe
starting pressures I need to go look up, but I think 33-35F, 31-33R on R6s
Your rear stuff looks fine. I think I am at -2 camber there, but it has way less impact than the front end.
Not knowing the track, the staggered camber means mostly heavy right hand turns correct? I have a track that coming up that is really hard on Left hand tires and another that is really hard on the rights. I have never staggered camber but think it might be a good idea for these tracks. Thoughts?
In most cases I end up using a left hand or right hand dominant setup. Based more on which corners are important, than on how many lefts or rights there are.
Maybe a tiny bit of toe-in for the rears...
And don't overlook that RF camber will go .2-.25* more positive without driver's weight in LF; LF camber will hardly change.
I always aligned my A2 w/weight in; then I could check/set cornerweight and null swaybars before re-connecting them.
Then rechecked cambers w/o driver so I could compare apples to apples if needed
Last edited by pfcs; 04-19-2010 at 03:56 PM.
phil hunt
If you want zero scrub, the front toe should be 3mm out at 3* camber. The rear should be the same.
Zero toe is not zero scrub. Some toe out rolls better.
10mm out, in the back will turn much better. If it is all rights, toe out the LR..
"Zero scrub" is when the camber thrust does not work against the other side/ The car rolls clean.
To check the scrub, set the tires at the target pressure(race pressure), tape down one 5ft long sheet of masking paper on a smooth flat floor. Lay another piece, over the first, about 4in shorter. Tape down the end closet to the car only, making marks with a pen on both ends of the paper to mark the starting position of the upper paper over the taped down ,lower paper. Roll the car over the paper, watch the paper slide on the taped down reference paper. Set the toe, until the upper paper does not move RE to the lower sheet. You cant back the car over the papers, because it will not roll backwards with out ripping the papers. (It is zero scrub in one direction only.)
The Miata , with 15x 22.5in tires needs about 3-4mm out, the VW with 13x21 needs about 3,mm.
It does change with tire pressure. check at the target pressures, cold does not mean anything..
HTH. MM
Mike Ogren , FWDracingguide.com, 352.4288.983 ,http://www.ogren-engineering.com/
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