CSG and RCE tag-team suspension Q&A thread! Ask us anything!

[CSG Mike]

Originally Posted by 7thgear

every car understeers in a static test

no manufacturer would put a car out that didn't :P

S2000

[Clipdat]

Thanks! But I don't have any aftermarket suspension bits except for the springs themselves. I didn't get the starter pack with the adjustment bolts.

Originally Posted by raul

Straight from RCE's website. They also packed it in my box when I got my Yellows.

[Clipdat]

Thanks for the reply. I'm a little worried that adjusting the front camber will put the wheel/tire too close to the strut perch.

I do appreciate you sharing your track experiences re: camber.

Originally Posted by solidONE

Without any addition of camber adjusting components people are just paying for toe adjustments when they take their 86's in for alignment. I'd feel ripped off... not getting my money's worth.

Judging from your alignment specs and my own experience with lowering springs on this car, you will likely get quite a bit of understeer around corners. You'd want to add some neg camber out front and/or take out some neg camber out of the rear wheels to get it closer to neutral. Although, Racecomp Andy can probably give advice on what adjustments you need seeing that this is their product.

Just as reference, I'm running 3.8k/4.5k springs with -2.6* of camber added to the front wheels and -2.3* camber in the back wheels after lowering. With 245/40/17 Eagle F1 Assym tires, and the car understeers a bit. Ran the same setup with only about *1.5* of camber out front at the track and it understeered a lot.

[raul]

Originally Posted by Clipdat

Thanks! But I don't have any aftermarket suspension bits except for the springs themselves. I didn't get the starter pack with the adjustment bolts.

Well, the idea is to get as close as possible to those settings regardless of what you have. The drop in the back gave you some negative camber, crash/camber bolts are fairly inexpensive and you should get some so you can work with the front a little.

I have bolts in the front running 17x8 +45 RPF1s and 245/40-17 tires with -1.2 with no rubbing issues. It's close to the perch, but it doesn't touch. My previous Hoosier R6s actually rubbed a smidge on the spring, not the perch. I decided to get the whiteline bushings to even out the rear.

[solidONE]

Originally Posted by CSG Mike

And, magazine published numbers for the OEM Primacys are 0.93... hmmm... :p

Hmmm indeed... Perhaps that is a bit oversimplified and not the best formula to calculate for suitable spring rates.... Or my Michelins are shittier than what that magazine tested.

Although I think 6k-8k range would be a pretty good compromise for a dual duty 86 with v12 hankook level tires. For the stock ".93g tires....." Not so much. And the stock rubber is no where close to the v12 or similar level tires in terms of cornering grip. Do you or anyone else have an explanation for this?

[7thgear]

.93 peak? XD


mmm... idea, I have an AMS SoloDL logs from the one time a buddy plugged it into my car,

car's stock

stay tuned..

[solidONE]

Originally Posted by raul

Well, the idea is to get as close as possible to those settings regardless of what you have. The drop in the back gave you some negative camber, crash/camber bolts are fairly inexpensive and you should get some so you can work with the front a little.

I have bolts in the front running 17x8 +45 RPF1s and 245/40-17 tires with -1.2 with no rubbing issues. It's close to the perch, but it doesn't touch. My previous Hoosier R6s actually rubbed a smidge on the spring, not the perch. I decided to get the whiteline bushings to even out the rear.

I have the same rims and tire size. @ about -1.5 camber I had very slight rubbing on the coils. 3mm spacer would definitely alleviate that. But, with the camber at -2.6 I have clearance issues even with a 5mm spacer.

[7thgear]

here is some data from a 2012 autoslalom run

you can see my peak G's, as determined by the AiM SoloDL unit..

highest peak was a 1.49 G's

car's stock.

So who knows what the "official" is :/

but you can also see that it generally hovers below 1.0 during most of the run... but gets very, very close.

[CSG Mike]

We're looking for skidpad sustained G's :p

[solidONE]

Originally Posted by 7thgear

.93 peak? XD


mmm... idea, I have an AMS SoloDL logs from the one time a buddy plugged it into my car,

car's stock

stay tuned..

I think how long a tire can sustain grip at peak load may be also a factor. Anyway. Do it.... Do it...

[7thgear]

Originally Posted by CSG Mike

We're looking for skidpad sustained G's :p

ain't nobody got time for dat

EDIT: Actualy, if you look at section 9, that's a pretty uniform circle, and I break 1.0 there...

meh,

car still felt slow XD

[solidONE]

It hard for me to believe that the stock tire can hold almost as much lateral gs as some sticky summer tires at .93g sustained.

One time I was making a right at an intersection, approaching the turn at less than 5mph, then I point the wheels, give it less than half throttle. The rear tires break loose just from that move..... Not what a ".93g" tire does. It was a fairly warm day as well. Definitely inconsistencies in the cornering g ratings.

[CSG Mike]

Originally Posted by solidONE

It hard for me to believe that the stock tire can hold almost as much lateral gs as some sticky summer tires at .93g sustained.

One time I was making a right at an intersection, approaching the turn at less than 5mph, then I point the wheels, give it less than half throttle. The rear tires break loose just from that move..... Not what a ".93g" tire does. It was a fairly warm day as well. Definitely inconsistencies in the cornering g ratings.

"giving it gas" is shock load, not sustained.

Also, the G figures are measured by doing a skidpad CW, then CCW, and averaged. At least, in theory.

[solidONE]

Originally Posted by CSG Mike

"giving it gas" is shock load, not sustained.

Also, the G figures are measured by doing a skidpad CW, then CCW, and averaged. At least, in theory.

Yes I understand. Was just trying to illustrate how NOT sticky the stock tires are.