STX Rules and Setup Questions

[Scooby South]

Originally Posted by piknockout

Looks like I'm finally going to buy some more parts an actually put them on the car. Still have half an STX build sitting in my storage room. I know, I'm lame. But with the ability to drive the SSR Vette, my motivation has been lacking. Also, quiet and comfortable has been quite nice. But I'm finally going to install all the suspension goodies soon after I order a few more things.

So real question here, what's the current thinking on rear lower arms? I know the SPC is the standard go to, but thought I had heard word of those slipping? Probably will get it anyways. Just wanted to get the consensus here.

They are almost a necessity to be able to control Rear Camber and toe and not have to rely on ride height to adjust. Whiteline, SPC, and others are what I have seen being used... Personally I am using Tru-hart, which conforms to the rules...as well as being easy on the budget. SPC is an inexpensive alternative as well but seems to take a bit more to get the camber right..

Bill

[piknockout]

Thanks guys, I ordered it anyways. It's the easy button and I'm not trying to be super competitive with it any time soon. Plan is to install all the suspension goodies when they get here, but I'll likely hold off on the exhaust/tuning until I decide to seriously compete with it. I like the quietness.

[Scooby South]

Originally Posted by BRZZZZZZZZZZ

I have the SPCs and haven't had any slip since I installed them (1 lapping day and 3 auto x days so far) but I was only running 225/50/16 tires. I am throwing on 255s tonight and considering ordering Cusco arms to replace my SPCs...

Cusco's are not legal in STX.. .as they have a spherical bearing end.. Replacement arms have to have a bushing end to be legal..

Bill

[BRZZZZZZZZZZ]

Originally Posted by Scooby South

Cusco's are not legal in STX.. .as they have a spherical bearing end.. Replacement arms have to have a bushing end to be legal..

Bill

I am aware, boost is going to put me out of STX anyway which is why I am considering the Cusco ones...

[brianL.]

Originally Posted by Turkish

What are you alignment settings?

Sent from my SM-G900V using Tapatalk

Originally Posted by Scooby South

^^^^ this.. after we learn your alignment... What spring rates are on the car.. KW changed at some point from a 7/6 to a more conservative 6/5 ??? I think.. most of us are on Square Rates.. Theres a couple of ways to loosen it up. a bigger Rear Bar is one way.. another way is up the rear spring rate.. and finally.. crank up the rear rebound. But alignment/ride height is a good place to start...

Bill

I'm running very conservative alinement right now(almost stock settings).Next year I will be doing a more aggressive alinement.I plane to do more mods next year but as of this year I just want to dial in the coilovers better and really don't know were to start.how much should I stiffen up the front and how lose should the rear be? also Should I do 1 or 2 click increments?

[Scooby South]

Originally Posted by brianL.

I'm running very conservative alinement right now(almost stock settings).Next year I will be doing a more aggressive alinement.I plane to do more mods next year but as of this year I just want to dial in the coilovers better and really don't know were to start.how much should I stiffen up the front and how lose should the rear be? also Should I do 1 or 2 click increments?

Where are they set right now?? To be able to help you.

Bill

[brianL.]

Originally Posted by Scooby South

Where are they set right now?? To be able to help you.

Bill

I made it 2 clicks stiffer in the front and 2 clicks softer in the rear from the break in period settings that kW recomends.

Do you think tire pressure will help? That day I ran 34psi in the front and 31 in the rear.I kept checking them after every 2 runs

[xDanger_208x]

Originally Posted by brianL.

I made it 2 clicks stiffer in the front and 2 clicks softer in the rear from the break in period settings that kW recomends.

Do you think tire pressure will help? That day I ran 34psi in the front and 31 in the rear.I kept checking them after every 2 runs

What tires?

[brianL.]

Originally Posted by xDanger_208x

What tires?

Bridgestone re11a

[xDanger_208x]

Originally Posted by brianL.

Bridgestone re11a

I'm not familiar with the sidewalls on those, but I run 28 rear, 31 front on my Z2's.

[autoXracer]

Originally Posted by xDanger_208x

Any installed pictures?

I'm running Ground Control camber plates. Gained about 0.5 inch travel, gained 0.5 degree caster, with tons of camber adjustment left

[barabia]

Are the Crawford BPBs legal in STX? I cant find anything that would suggest they werent but I thought Id ask in case someone has a definitive answer.

[RiskyTrousers]

Originally Posted by barabia

Are the Crawford BPBs legal in STX? I cant find anything that would suggest they werent but I thought Id ask in case someone has a definitive answer.

From what I understand you can't touch anything between the throttle body and exhaust ports, so I think they're out. I don't have the rule book on hand, maybe someone can quote the relevant section?

[was385]

Originally Posted by barabia

Are the Crawford BPBs legal in STX? I cant find anything that would suggest they werent but I thought Id ask in case someone has a definitive answer.

No, they're not legal.

C. The air intake system up to, but not including, the engine inlet may be modified or replaced. The engine inlet is the throttle body, carburetor, compressor inlet, or intake manifold, whichever comes first.