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

[Compelica]

Originally Posted by Racecomp Engineering

Depending on which camber plates, there's usually a middle 0 position that is similar to stock angle. I wouldn't expect clearance issues with 225s and -2.25 degrees camber on stock wheels but I would look closely.

- Andrew

Thanks Andrew. My camber plates are these in the link below. I see there's a marker there, is that which you're referring to? Will check on the actual car later on.

https://i2.wp.com/www.corner3motorsp...00%2C375&ssl=1

[Racecomp Engineering]

Originally Posted by Compelica

Thanks Andrew. My camber plates are these in the link below. I see there's a marker there, is that which you're referring to? Will check on the actual car later on.

https://i2.wp.com/www.corner3motorsp...00%2C375&ssl=1

Unsure. If you have a set of OEM mounts nearby you should be able to compare.

- Andrew

[Danny318]

Looking for recommended changes to reduce understeer on track.

Car info 2019 pp
Hancook rs4 245 40 17 on 9in
RCE tarmac 2 with 7kg f/r springs
*edit* Ride height:
F: 13 1/2 in
R. 13 9/16 in
Recommended clicks for track
-3.4 f
-2.6 r
3mm toe in rear
0 toe front
Subframe and diff bushing stiffeners

The initial turn in is great, lots of bite but mid corner and track out it wants to plow and understeer and the front tires howl a lot. It’s manageable and still very fast, but I’d like a bit more neutral handling.

I’m wondering if lowering the front will help
Or stiffer rear springs
Or do I need a rear bar

Looking forward to advice

[bhmax]

I have the SS1 and had to go stiffer springs in the rear to get the balance like I want it.

[marco_mc22]

Before purchasing other mods I’d try playing with shocks, roll center and alignment; mid corner push could be reduced stiffening front rebound and rear compression damping a little, lowering front roll center or raising rear and using less toe in rear to get more rotation. You can also open a bit the front toe, like 2mm open front and 0 to 2 closed rear.
Then if you’re still pushing you may try a stiffer rear bar.

[Danny318]

Originally Posted by bhmax

I have the SS1 and had to go stiffer springs in the rear to get the balance like I want it.

What spring rates were you on and what did you end up with? On track or street?

[bhmax]

Originally Posted by Danny318

What spring rates were you on and what did you end up with? On track or street?

Tried the stock 6k and went to 7k in the rear. Like mentioned, there would be other ways to go about it but I had been running Swift SpecR and liked the higher rate in the rear. Mostly track, with a little bit of street and AX. I understeered pretty badly on track and the 7k rear took care of that for me.

[Racecomp Engineering]

Originally Posted by Danny318

Looking for recommended changes to reduce understeer on track.

Car info 2019 pp
Hancook rs4 245 40 17 on 9in
RCE tarmac 2 with 7kg f/r springs
Close to stock ride height (about 1/4in higher in rear than front)
Recommended clicks for track
-3.4 f
-2.6 r
3mm toe in rear
0 toe front
Subframe and diff bushing stiffeners

The initial turn in is great, lots of bite but mid corner and track out it wants to plow and understeer and the front tires howl a lot. It’s manageable and still very fast, but I’d like a bit more neutral handling.

I’m wondering if lowering the front will help
Or stiffer rear springs
Or do I need a rear bar

Looking forward to advice

What are your actual ride heights? Center of wheel hub to fender.

- Andrew

[Danny318]

Originally Posted by Racecomp Engineering

What are your actual ride heights? Center of wheel hub to fender.

- Andrew

F: 13 1/2
R. 13 9/16

[Racecomp Engineering]

Originally Posted by Danny318

F: 13 1/2
R. 13 9/16

You could go a 1/4 inch lower front and rear, but you don't have to.

Try increasing rear compression 3 clicks. Could also (or instead) reduce front rebound but that will have an affect on turn in. Start there because it's free, but adding some 8k rear springs is certainly another possible solution that works.

Would also try to get some tire temps and see if you need a smidge more front camber.

That's 3mm total rear toe in right?

- Andrew

[Danny318]

Originally Posted by Racecomp Engineering

You could go a 1/4 inch lower front and rear, but you don't have to.

Try increasing rear compression 3 clicks. Could also (or instead) reduce front rebound but that will have an affect on turn in. Start there because it's free, but adding some 8k rear springs is certainly another possible solution that works.

Would also try to get some tire temps and see if you need a smidge more front camber.

That's 3mm total rear toe in right?

- Andrew

Yeah, 3mm total toe.

I did try 4 clicks more of rear compression while on track and it really only made it more bumpy when driving to the gas station.

Tire temps with a pyrometer were pretty even so camber is good.

I will try lowering it. I know some run a lot lower in the front than rear (csg Mike right?). Does a lower front lead to less understeer?

I’m thinking I’ll need the 8k springs

[Racecomp Engineering]

Originally Posted by Danny318

Yeah, 3mm total toe.

I did try 4 clicks more of rear compression while on track and it really only made it more bumpy when driving to the gas station.

Tire temps with a pyrometer were pretty even so camber is good.

I will try lowering it. I know some run a lot lower in the front than rear (csg Mike right?). Does a lower front lead to less understeer?

I’m thinking I’ll need the 8k springs

Yes lower in the front will help...forward rake.

- Andrew

[marco_mc22]

A lower front is better as long as you have enough bump stroke to keep everything off from the bumpstops, otherwise it will be worse. Also, dropping til -35 or more requires to adjust roll center in my opinion. It gets higher when you’re lower, makes everything even stiffer.

Rear toe makes a great difference though, I’d give it a try.

[Danny318]

I ordered 8k springs for the rear and hope to get them in for the next event in a month. I’ll lower the front a bit too. May even corner balance. Will update late June. Hopefully this gets it dialed. Thanks for all the suggestions.