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

[Racecomp Engineering]

Your alignment ideas are good....-3 front and around -2 rear. I think we're at -2.2 or so and it's good.

- Andy

[BRZ NA]

Ride height 2"drop all around shouldn't be too low?

[solidONE]

Originally Posted by Racecomp Engineering

I would like to dyno them myself.

The compression adjuster doesn't seem to be doing much in the low-speed range and is basically just moving the knee. Big effects on mid and high speed. Yes you can feel that but there isn't a huge amount of benefit. Honestly they're only "digressive" in compression when they're cranked way up.

- Andy

The dyno on their standard digressive valve looks more normal than their "ultra digressive". On the "ultra digressive" they ramp up from 1 in/sec to about 3 in/seconds before it starts to flatten out. Maybe there is a reason it was done that way.

[CSG Mike]

Originally Posted by Racecomp Engineering

My ideal track set-up....hmmmmm.....

Coilover: JRZ motorsports 4 ways (with JRZ Bryan Hise helping us with set-up)
LCAs: Don't care, something with quality pillowballs
Other components: replace all bushings with pillowballs. Front roll center adjustment. Lowering camber plates. Lowering rear top mounts.
Alignment: -3.5 degrees front, -2.2 degrees rear camber, or in that ball park depending on spring rates and tires. Toe to suit driver. Caster to suit track

That would be pretty nice. Pinch me.

RCE T2 clubsports would be the realistic choice but if we're dreaming....

Seriously, I really like our RCE T2 clubs. For the money it's hard to beat. Replace the JRZs with our stuff and you're still sitting pretty and your wife/husband/SO won't stab you because going out to dinner now means peanut butter jelly time.

- Andy

Well shit, if we're going infinite budget... I was just listing our current setup

[CSG Mike]

Originally Posted by solidONE

What about these guys?



The digressive valving looks pretty decent with really broad range of adjustment, though not quite sure how digressive rebound damping is beneficial to performance. I'm used to seeing just digressive comp damping in some premium grade dampers (penske ohlins). I think AST are going double digress ive with their new 4150 line as well. Fortune seems to offer different valving to match whatever spring rate you order. This is much better than a lot of other brands who only offer the same damping curves for different spring rates. Seems like the components they use to build their dampers are really good quality as well.

What do you guys think?

It's the same picture they use... I'd like to see application specific. I've never seen substantiated results from FA.

They've claimed SCCA/NASA wins, but when that win is from being the only car in class and/or from just showing up to the most events, I don't buy it.

[CSG Mike]

Originally Posted by BRZ NA

Ride height 2"drop all around shouldn't be too low?

IMO, it's too low. I'd recommend getting the Ground Control front mounts to regain some lost bump travel, and @Robispec rear mounts, again, to regain lost bump travel, as well as Robispec arms to correct roll center.

[BRZ NA]

Originally Posted by CSG Mike

IMO, it's too low. I'd recommend getting the Ground Control front mounts to regain some lost bump travel, and @Robispec rear mounts, again, to regain lost bump travel, as well as Robispec arms to correct roll center.

I was thinking if I use robispec arm so I don't need camber plate to adjust camber, is that right?

[BRZ NA]

How about 1.25" to 1.5" drop? will it lost bump travel? so what's the Max can u lowered so that it won't need to regain lost of bump travel?

[Captain Snooze]

Originally Posted by TheseColorsDontRun

Ok so I know we have all experienced the drivetrain slop in these cars. Lots of transmission and diff bouncing

[rant]
I'm sorry but I don't know what you are talking about. I have asked in another thread for this slop to be explained but I can not pick it. I was expecting after having rear subframe bushes (not inserts) and diff carrier bushes (inserts) fitted there was going to be some huge revelation. I (ymmv) couldn't tell the difference. Same with TiC alloy rack bushes. Maybe there was a difference. Then again it may have been placebo.
[/rant]

[whataboutbob]

I was just thinking about how it might be useful to characterize the camber/toe changes that result from various levels of suspension compression. Thoughts?

[ultra]

Originally Posted by BRZ NA

I was thinking if I use robispec arm so I don't need camber plate to adjust camber, is that right?

Curious about using the @robispec arms to adjust camber in front as well...in addition to correcting roll centres and adding caster.

Also curious to know whether being able to have more than 2degrees of camber up front will increase front grip on street tires (driven on street, autoX & track).

[Dezoris]

Originally Posted by ultra

Curious about using the @robispec arms to adjust camber in front as well...in addition to correcting roll centres and adding caster.

Also curious to know whether being able to have more than 2degrees of camber up front will increase front grip on street tires (driven on street, autoX & track).

I have been on sticky 225 and 235 RS3 with -1.5 up front on stock suspension and even heavy autocross I can correct wear with pressures.

I think -2.0 might be too much for street but will be great for track and ok for autox. That is what I will be running soon to test

[Dezoris]

So 15mm drop is this magic number thrown around where did this come from? Is that the farthest you can go on stock suspension geometry without negative effects?

[ft_sjo]

Both the STI & TRD springs, and I believe the Ohlins recommendation is -15mm..