Nokones

What has been the maximum camber that everyone is getting on their C6s? On my 13 manual tranny Grand Sport the max is 1 1/4 on the front and about a degree on the rear? You would think that the engineers would factor in some more camber for a factory production track/autocross car.

davidfarmer

that is unusual, did you remove any washers behind the upper control arms? Camber plates buy more camber, and many aftermarket bushing kits come with offset upper mounts for additional camber

Nokones

No, I didn't remove the washers. I'm trying to keep it legal for SCCA stock class. I haven't check the NCCC rules yet but, I have a feeling their rules will not allow the removal either. I'm trying to keep it steerable. I have a heavily modified autocross car already. The Grand Sport is just forv giggles and my 89 is for being serious.

davidfarmer

You relocate the washer to the front of the mount, it’s part of the factory alignment procedure. Some cars have them, some don’t. If yours has them and you remove or move them, no one could ever prove they were there

ttx350z

My fronts are at -2.1 and rear at -1.5. Theres still adjustment on the eccentric if i need more. Thats with all the washers in place as well.

Brainhulk

I got -3 front, -1.8 rear with AMT blocks.

STANG KILLA SS

you have to remove all the washers behind the upper control arm mounts.
i was able to easily get -3.4* up front. with all factory components.

Nokones

Good point. I just moved from California to Arizona and my factory service manuals are still in one of my many boxes still stacked up in the various rooms. I need to make a copy of that procedure in order to prove that it is a legal procedure so if someone protests it I can whip out the document showing that it is a legal/allowed modification.

Nokones

I can't find anything in the Factory Service Manual stating that the washers, called "Spacers, can be moved or removed as a procedure for adjusting the caster/camber. The factory service manual, Book 4, Section 16-47 (Front Suspension) states that the washers (Spacers) must be put back in its original position when the upper control arm is replaced. In Book 4, Section 16-117, (Wheel Alignment) states that the caster/camber is adjusted by the cams on the lower control arm. If there is a procedure to remove the washers (Spacers), I can't find it. Any help would be appreciated if anyone knows where in the factory service manual that this procedure is listed.

It appears that removing the washers is not an allowed modification in the stock class for either SCCA or NCCC.

davidfarmer

Does the service Manual state how many washers came on your car? Mine had zero

sccaGT1racer

Lol Good one!

ttx350z

I don’t see what the issue is. The rules state that you can use shims (i.e. add or subtract) to get an alignment even if it’s outside the manufacturers specs.

Street Category 13.8/E

E. If offered by the manufacturer for a particular model and year, the use of shims, special bolts, removal of material to enlarge mounting holes, and similar methods are allowed and the resulting alignment settings are permitted even if outside the normal specification or range of speci- fications recommended by the manufacturer. If enlarging mounting holes is specifically authorized but no material removal limits are speci- fied, material removal is restricted to the amount necessary to achieve the maximum factory alignment specification.

davidfarmer

Seriously, they do not come with a standard number of washers

Nokones

David, I just reread the factory service manual and now I have a better understanding about this subject. The Factory Service Manual states in Book 4, Section 16-47, Item #5, "Install the upper control arm spacers (1), if equipped." I better take a look and see if my Grand Sport is "if equipped". I'm pretty sure that it is not equipped and I will have to have my camber readjusted accordingly.

Thanks David for pointing that out. I appreciate it very much. Lesson learned.