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Gary Gibbs · 01-10-06, 07:42 PM

[ QUOTE ]

Positive caster on the rear? Is this something specific to your car or something you need? Just wondering, I've never run positive caster on anything I wanted to handle well.

I'm not sure how I'll like toe in on the front. It is supposed to improve stability on the straights but when I've messed with it I can tell a lot more positive benefits from toe out on turn in than I get negative benefits from the same.
R

[/ QUOTE ]
Here I am defining positive as inclining the upright rearward at the top. Most (all?) cars run positive caster in the front. In the rear it is going to be geometry dependent with the idea being the bump steer tends to slight toe in in bump and droop. Thus you never get toe out in the rear which for a high speed car is something you do not want. I will admit I have not tried toe out on this car. I used it extensively on my lower speed Legends race car. This car has great turn in and was not wanting to sacrifice straight line stablilty on a car with this speed capability.

01-10-06, 07:42 PM	#9 (permalink)
Gary Gibbs CCX33911 10 tenths Join Date: Dec 2001 GT40: Virginia Posts: 1,222 Rep Power: 19	Re: Chassis Setup for GT40s [ QUOTE ] Positive caster on the rear? Is this something specific to your car or something you need? Just wondering, I've never run positive caster on anything I wanted to handle well. I'm not sure how I'll like toe in on the front. It is supposed to improve stability on the straights but when I've messed with it I can tell a lot more positive benefits from toe out on turn in than I get negative benefits from the same. R [/ QUOTE ] Here I am defining positive as inclining the upright rearward at the top. Most (all?) cars run positive caster in the front. In the rear it is going to be geometry dependent with the idea being the bump steer tends to slight toe in in bump and droop. Thus you never get toe out in the rear which for a high speed car is something you do not want. I will admit I have not tried toe out on this car. I used it extensively on my lower speed Legends race car. This car has great turn in and was not wanting to sacrifice straight line stablilty on a car with this speed capability.