Toy90

I have -2 front -1.2 rear and I'm wearing the outsides too much. Is -3/-2 needed to stop this? I run Nitto NT01's and I'm going to flip them on the wheels but want to wear them more evenly.

SDF

I run -2.1 up front and -1.6 rear. I run zero toe in front and 1/8" total toe in for the rear.

Sidney004

Are you wearing the outsides of just the fronts or all four? Either way, -3 front(if you can get that much), -2 rear will be much better. I run the Maximum possible in front(-3 left, -2 1/2 right) and -2 rear.

Toy90

Yes, I'm wearing all four on the outsides. I've been rotating them often to keep it even all the way around as some tracks wear left or right sides more than others. I will have to use the thinner spacers on the control arms or get offset bushings for the lowers.

Rob31

-2 in front and you still have shims or standard spacers ???
What tracks are you running ? Road course ? ax ? Got any pics ?

Aardwolf

My first thought is that the alignment place lied to you about the specs, but I'm a paranoid jerk.

It's rare to get that much camber without offset bushings, grinding down the conical arm spacers, adjustable arm, or etc etc.

Toy90

I was surprised too, but I think it's amplified because the car is low to the ground. I was in the car as the guy was setting the alignment and told him he was full of it. I had -2.0 on the drivers side and -2.3 on the passenger with 6.8/6.9 caster. I can scan the printout if you like. I asked him if they calibrated their machine and he said all the time. When I brought the car home it looked crazy because the front tires are so tucked in now. I think the camber brace pulled it together a little too. I also have poly bushings which may have taken out slop the rubber would allow. I don't have any shims except some really thin ones on the passenger side to even out the camber but the stock spacers are there. I run at Autobahn Country Club, Blackhawk Farms, and Road America. The pic with tape measure is the outer most point of the stock 255 tire. It looks like around 1.25" in to me.

Rob31

If the car is lowered then the -2 is beleveable . Camber curve increases with wheel travel .
Next time your at Blackhawk or ACC let me know .
I was at ACC last Friday . Had the full course all to myself .(almost)

Toy90

Will do Rob. I really like Road America and was there this past weekend with MVP. There were 120 cars in three groups and we still got 4-20 minute sessions in the morning and 3-25 minute in the afternoon each day. MVP was $100 cheaper than the F-body event and you get more run time. Joliet is a little far for me but I was there with NASA in July.

Andrew, have you tried machining your spacers yet or using just the smaller ones for more camber?

Aardwolf

I've got the VBP offset bushings on my list for this winter. My car is lowered too but I can't get as much camber as I would like. 1.3° right and 1.8° left max, with no shims at all in. I was thinking of cutting the spacers down but there isn't much material there, I'm pretty sure I would still need the bushings.

Toy90

I read someone used the small spacers in place of the thicker ones to gain camber. The only problem I see with that is you would lose caster which is also beneficial to handling. I will look into the offset bushings as well because tires aren't cheap and I don't want to cord them on the outside before the rest of the tire is shot.

larryfs

My C4 handled like trash with -1.5 in the rear. I had to back it down to -0.9

The front you can only get so much, unless you get creative with the control arm.

I have some of those small spacers left over from my C4

Toy90

Larry, did you use small spacers only in the front? What was your caster/camber if you did?

larryfs

On the passenger side, I got by with small spacers, and minimal shims.

On the drivers side, I had to get creative with the cross shaft, and shims, with no spacers.

When I was done, and the alignment shop was done, the car was really solid. IIRC, it was around -1.3; but I would have to pull my records to be sure.

With a good set of tires, I was running with some C5's back then.

I have to check to see if I have any spacers left...

Toy90

Do you mean -3.3 in the front? What was your caster like without the spacers?

larryfs

your not getting -3.3 on a C4, with stock control arms.

I suggest you get offset bushings, or those fancy control arms with the adjustable arm lengths.

subtlez28

Slightly off topic, but:

Toy90, you should come run Midwestern Council events next year with Rob31 and me (assuming I ever get my swap done).

http://www.mcscc.org/autocross.php

They run BHF, Autobahn, and Milwaukee mile. It would be great to have another C4 out there.

Rob31

Hey Shaun , Hows the shoulder ?

With that much camber especially at Road America Im surprized your not wearing out the inside edge of the tire .
Even at ACCmy tires are a little hotter on the inside .

Road America is the least abraisive track in the Midwest . although the carosel will get some heat in the Lt. sides
Got a pic of the tire ? What pressure ? Something isnt adding up .

Toy90

I need to flip my Nittos first and see how it does at another event before I make any other changes. I was running 28psi cold and the tires were rolling over to the little markers on the outside of the tire so they're inflated ok. I ran a couple events with a stock alignment which wore them uneven off the bat. I just figured after the alignment and camber change it would start to even out a little, but the insides are still not wearing as much as the outsides. I don't have any pics at the moment.

I may check out Midwest next year. There were no C4's at RA besides me. I only did two events this year and one was with NASA at Autobahn in July where my pinion seal started leaking. Road America's carousel made the left sides wear out faster. I swapped lefts to the right side after the first day to keep the tires wearing more evenly.