STX Rules and Setup Questions

[jprice130]

Originally Posted by vroom4

Fourth place car at nationals this year is feals on custom spring rates.

Yeah, and that guy was a hack too!

[strat61caster]

Huh, never heard of Feal before, looks rather similar to Fortune Auto 500, also available with custom spring rates and matched dampers for a similar pricepoint ($1.2k-$1.6k)

[Racecomp Engineering]

Originally Posted by smg1138

It seems like KW V3's are a popular option, but the newer spring rates look way too soft.

They are soft, so you should check out RCE Tarmac 2s.

- Andy

[rx3]

By how much would springs rates need to increased if an STX car was running on R-comp tires instead of street tires? Is there any rule of thumb?
(I know this is sort of OT).

[AFRichZC6]

Originally Posted by rx3

By how much would springs rates need to increased if an STX car was running on R-comp tires instead of street tires? Is there any rule of thumb?
(I know this is sort of OT).

Not really a rule of thumb. They say suspension tuning is a dark art. I'm only in C Street, but I think this is how I'd go about it.

You'll want to know how much load is being placed on a particular corner of the car (through testing/trial & error with temperature probe), then do either one of two things to help maintain maximum contact patch (even wear and heat across tire): (1) Dial in more negative camber or caster or (2) increase spring (or sway bar) rate enough to prevent camber loss as the camber curve changes through compression. Those would be the big changes. Tire pressure goes without saying.

With increasing spring rate, you may work the tire too hard (you may lose too much mechanical grip). With more spring, you may want to adjust damping. With more bar, you may lose too much wheel independence. With increasing negative static camber, you may lose some braking/acceleration traction due to loss of contact patch (when you're not cornering). With increasing negative caster, you may lose some response in transitions or turn-in.

[vroom4]

Originally Posted by jprice130

Yeah, and that guy was a hack too!

And a ginger, that's good for at least -0.5s in the bad direction.

[ksconekiller]

STX car for sale here in the classifieds:

http://www.ft86club.com/forums/showthread.php?t=96220

[renfield90]

I skimmed about a third of this thread (seriously) but didn't see much in the way of setup advice. I've got a pretty good idea of what shocks/springs and power mods I want but what are most people doing for sway bars?

Are there any good STX build threads someone can point me to?

[Shneegle]

Originally Posted by renfield90

I skimmed about a third of this thread (seriously) but didn't see much in the way of setup advice. I've got a pretty good idea of what shocks/springs and power mods I want but what are most people doing for sway bars?

Are there any good STX build threads someone can point me to?

I would start by looking here: http://www.ft86club.com/forums/showthread.php?t=30303

It was started some time ago and it has some good information. You could find some build threads from it as well or at least people to look for.

[48Spoons]

Originally Posted by renfield90

I skimmed about a third of this thread (seriously) but didn't see much in the way of setup advice. I've got a pretty good idea of what shocks/springs and power mods I want but what are most people doing for sway bars?

Are there any good STX build threads someone can point me to?

Sadly not much. I went through this last year when looking what to get for my STX build. Mostly looked at what spring rates and alignment settings people were using and then based my build off of that.

For a summary:
Spring rates seems to be around 400-500, I personally run 440 all around, which was what ground control suggested for autox.

Camber is -3.3-3.0 in the from and -2.0-1.7 in the rear. Toe seems to vary by driver preference. I'm at -3.1f/-1.9r and no toe.

Not really sure what people doing for bars though. I'm running the strano front with stock rear and the car feels great.

[RedBRZ80]

Originally Posted by 48Spoons

Sadly not much. I went through this last year when looking what to get for my STX build. Mostly looked at what spring rates and alignment settings people were using and then based my build off of that.

For a summary:
Spring rates seems to be around 400-500, I personally run 440 all around, which was what ground control suggested for autox.

Camber is -3.3-3.0 in the from and -2.0-1.7 in the rear. Toe seems to vary by driver preference. I'm at -3.1f/-1.9r and no toe.

Not really sure what people doing for bars though. I'm running the strano front with stock rear and the car feels great.

I think your right in the money. I'm 400 lbs square with -3F -2R no toe. Still DD as well. White line FB stock rear. / tried a rear bar but I don't like crazy loose.

[justinco]

Those of you running SPC or Whiteline stamped rear LCA's...what are you getting for rear camber?

[drewbot]

Originally Posted by justinco

Those of you running SPC or Whiteline stamped rear LCA's...what are you getting for rear camber?

Whatever camber you want for STX really. I've been at -2 for months now

Sent from my A0001 using Tapatalk

[48Spoons]

Originally Posted by justinco

Those of you running SPC or Whiteline stamped rear LCA's...what are you getting for rear camber?

I have the SPC once, currently set to -1.9. might if i can get a little more next year.