Project C4, 85 Corvette

[Steve85]

Starting point:
Front
Toe 1/16 out
Camber -2.5┬░
Caster 6┬░
Rear
Toe 1/8 in
Camber -1.7┬░

Max front camber w/out the offset bushings is about -1.5┬░, most are in the -1.25┬░, I think I was at -1.25┬░.

My car pushed real bad at autox and the track days I've done. Everything a C4 is sensitive to in terms of causing a push, I had. Monster rear tires relative to front (335rr vs 285fr), no camber (was 0 at last alignment check before I took out all the shims), limited caster, big front bar with poly bushings.

Oh yeah - I also cut my roll bar out this weekend.

My initial roll bar install was a disappointment. It's a 6 point done to NHRA specs. Turns out the guy who did it never did a Corvette before and said he'd never do one again. My fault for not checking him out more.

When I got the interior back together I could not move the seat all the way back. Seating position was pretty poor for me at 6'2". Bad enough that Mike Sarver even commented on it in my log book after an HPDE at Summit. I decided to cut out the cross bar behind the seat to have a new one put in.

New problem...the roll hoop is too far forward. Here it was in relation to the seat/headrest. When sitting in the car with helmet on, the helmet hits the roll hoop. If looking at the helmet from the side with the face to the right (at 3 o'clock) the helmet hits at the 11 o'clock position. So, back of the helmet but pretty high up on the back.

(Intentions are safe HPDE car, safety in accordance with performance, unlikely to ever to be full race car)

OUCH!!!



Bar was mounted to the floor just behind the seats and couldn't be laid back enough to allow the seat to go all the way back. New bar will mount where the frame rises up over rear wheel well as pictured below.



Took it for a spin w/out the roll bar, MUCH more comfortable. No real track days on the horizon for this car (an autox or two though) so the regular belts are back in while the I work on getting the hoop right.