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

[churchx]

@Pat: I wouldn't say that camber plates make BIG difference over camber bolts if you dial in same amount of camber. They often do allow more camber to be dealed in and are much easier to adjust (at much higher price of plates themselves of course), but if you are not aiming for lot of camber and if you are not the one doing alignment, where is difference then?

[OkieSnuffBox]

Originally Posted by Jidonsu

I have the Tarmac IIs waiting to be installed. I figure I'm going to have to order some rear LCAs anyways. What do you guys recommend for something that will be STX legal and can stand up to some sporadic track use?

Whiteline, RS*R, Velox are the ones I can think of.

[strat61caster]

Originally Posted by Jidonsu

I have the Tarmac IIs waiting to be installed. I figure I'm going to have to order some rear LCAs anyways. What do you guys recommend for something that will be STX legal and can stand up to some sporadic track use?

I haven't seen failures on any of the LCA's on this car out there, they all appear safe for hard use, STX legal cuts you down to 5 options:

SPC w/ a replacement bushing for the spherical bearing
Whiteline appears legal in it's current config with the pressed in bushing
Racer-X
RS*R, honestly forgot about this one until Okie mentioned it
Velox, most expensive, lightest

I've got the Racer-X, pretty happy with it, I like how accessible the adjuster is, the rest are tucked into the subframe and you have to locate each threaded end asymetrically it looks like. Whichever you choose make sure it's got a polyurethane bushing, not metal per STX rules. Local events nobody should care, but if you start competing at a national level it's an easy disqualification.

Threaded adjustment on the RacerX, rsr, velox are convenient and makes things nice and repeatable if you're doing your own alignment, the cam adjustment on SPC/Whiteline will be a little less precise but no less effective, if you don't plan on doing your own alignment I'd pick the SPC/Whiteline.

[8R6]

this is a brake question, but do you guys know the reasoning/logic for some manufacturers placing the brake caliper on the "front" of the rotor (towards front of car), while some place the caliper on the "rear" of the caliper (towards rear of car)?

[MaximeT]

Originally Posted by 8R6

this is a brake question, but do you guys know the reasoning/logic for some manufacturers placing the brake caliper on the "front" of the rotor (towards front of car), while some place the caliper on the "rear" of the caliper (towards rear of car)?

One solution is cheap, the other one is good for weight distribution.

[8R6]

Originally Posted by MaximeT

One solution is cheap, the other one is good for weight distribution.

so it's not related to the braking performance itself? thats what i couldnt figure out. like if it mattered where on the rotors the pads clamped down on the rotor and was just wondering if there was some fancy physics thing that i just have no idea about lol

[MaximeT]

Originally Posted by 8R6

so it's not related to the braking performance itself? thats what i couldnt figure out. like if it mattered where on the rotors the pads clamped down on the rotor and was just wondering if there was some fancy physics thing that i just have no idea about lol

Race cars and expensive road cars are mounted inside. I guess it might be more expensive to do for some packaging reasons.

Maybe easyer to do with double wishbones.

[strat61caster]

Don't forget cooling.

[Jidonsu]

Originally Posted by strat61caster

I haven't seen failures on any of the LCA's on this car out there, they all appear safe for hard use, STX legal cuts you down to 5 options:

SPC w/ a replacement bushing for the spherical bearing
Whiteline appears legal in it's current config with the pressed in bushing
Racer-X
RS*R, honestly forgot about this one until Okie mentioned it
Velox, most expensive, lightest

I've got the Racer-X, pretty happy with it, I like how accessible the adjuster is, the rest are tucked into the subframe and you have to locate each threaded end asymetrically it looks like. Whichever you choose make sure it's got a polyurethane bushing, not metal per STX rules. Local events nobody should care, but if you start competing at a national level it's an easy disqualification.

Threaded adjustment on the RacerX, rsr, velox are convenient and makes things nice and repeatable if you're doing your own alignment, the cam adjustment on SPC/Whiteline will be a little less precise but no less effective, if you don't plan on doing your own alignment I'd pick the SPC/Whiteline.

Thank you for the thorough response. I'm leaning towards the RacerX as this point. I just emailed them to see the actual weight. The velox does look really nice, just not sure if it's $100 nicer.

[OkieSnuffBox]

If you could find a way to replace the rod end on the SPL arm with a bushing, that would hands down be the best solution to me.

Based on the reputation, and the ability to tune shock/sway ratios, and also get some lowering while maintaining travel with the lower shock mounting holes.

[strat61caster]

Originally Posted by OkieSnuffBox

Based on the reputation, and the ability to tune shock/sway ratios, and also get some lowering while maintaining travel with the lower shock mounting holes.

That's actually illegal and why I didn't consider RS*R at first, so they're out too unless you verify everything is going back in the same hole.

14.8.H.5. The replacement arms or mounts must attach to the original standard mounting points. All bushings must meet the requirements of Section 14.8.B. Intermediate mounting points (e.g., shock/spring mounts) may not be moved or relocated on the arm, except as incidental to the camber adjustment. The knuckle/bearing housing/spindle assembly cannot be modified or replaced.

http://www.scca.com/pages/solo-cars-and-rules

[OkieSnuffBox]

Good point. I quit paying attention to SCCA Auto-X rules a few years ago.

However, in reality, if you aren't looking to trophy at Nationals I doubt anyone would care.

[PedoJim]

I did an alignment on my car like a month ago, the front is perfect but the back is a bit too low. Id like to raise it a bit (1 finger). Will this affect the toe at the back? I dont remember seeing a place to adjust the toe at the back. (stock btw, only coilovers)

[cjd]

Originally Posted by PedoJim

I did an alignment on my car like a month ago, the front is perfect but the back is a bit too low. Id like to raise it a bit (1 finger). Will this affect the toe at the back? I dont remember seeing a place to adjust the toe at the back. (stock btw, only coilovers)

Yes. Adjustment is there. Raising changes camber and toe. Someone even posted some numbers recently iirc.