Suspension and tire advice

Discussion in 'Auto-Cross' started by searay86, May 21, 2018.

  1. searay86

    searay86 Active Member

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    I'm running in STP at the moment with my 98 gt and I think I want to stay here. I have ran in 4 events so far! Currently running some cheap lowering setup ( doesn't even sit level :( ) and with OEM 8×17in rims. I'm looking into coilovers and a staggered setup with 9s in the front and 10.5 in the rear. Advice or others setups would be appreciated!

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  2. evilcw311

    evilcw311 Well-Known Member

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    Staggered wheels will cause a bit of relearning as it totally changes how the steering feels and reacts.


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  3. searay86

    searay86 Active Member

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    Will it be worth it in the long run? I don't have that much experience to lose lol.
     
  4. evilcw311

    evilcw311 Well-Known Member

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    It creates more of an Understeer condition. On road courses the turns can generally still be managed with a little learning. In autocross it can be a little tighter so you will need to learn to adjust your entry and exit points in the turns.


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  5. searay86

    searay86 Active Member

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    Ok thank you!
     
  6. Frank.JD.Perez

    Frank.JD.Perez Well-Known Member

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    What exactly is your goal and budget?
     
  7. searay86

    searay86 Active Member

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    Goal- be more competitive in cone racing, including more experience
    Budget- I don't really have a limit but I'm not going to go out and buy everything my car needs right now lol. I'd like to do it in phases
     
  8. evilcw311

    evilcw311 Well-Known Member

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    Replace front and rear lower control arms. The factories flex to much which allows the geometry of the suspension to get all out of whack


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  9. Frank.JD.Perez

    Frank.JD.Perez Well-Known Member

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    Get a phb or watts and full length subframe connectors if you dont have them yet. Also some good 200tw tires like falken azenis 615k+ or Bridgestone something that i dont remember what its called.
     
  10. searay86

    searay86 Active Member

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    Any recommendations on what brand? I'm sure that'll help my case

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  11. searay86

    searay86 Active Member

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    The car came with subframe connectors so I'm good there. I have been looking at tires but I only have 8in right now. Should I wait to get some thing wider?

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  12. searay86

    searay86 Active Member

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    AND is it true replacing the stock cats with 2 high flow cats will wake the car up? Want to make sure before I spend 400 on exhaust.

    Thanks for the help!

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  13. 96blak54

    96blak54 Well-Known Member

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    The high flowing cats may move torque output a little higher up in the rpm, but no real hp will be gained....maybe 5-10hp. If the car still has the stock intake manifold, adding anything to improve hp is only a foward step in hopes to replace the pathetic intake with something better. The stock npi manifold just sux.

    Dang... $400? Ouch! I guess you live where there is smog nazi?
     
  14. searay86

    searay86 Active Member

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    Alright I'll put exhaust on my list but not a priority lol. Its 400 because I need a cated setup to stay in SCCA STP
     
  15. ReplicaR

    ReplicaR Well-Known Member

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    What are the limitations of STP? Knowing which class you race in, and what are the rules will definitely help you narrow down your modifications.
     
  16. Frank.JD.Perez

    Frank.JD.Perez Well-Known Member

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    I was about to tag you last night lol
     
  17. PinkieT

    PinkieT Well-Known Member

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    Like 96blk54 said, best power bang for the buck seems to be a PI intake. There is a little extra work that needs to be done to fit one to PI heads but is doable in your driveway. Get a good used factory OEM or Ford Racing intake, avoid aftermarket (Dorman, etc.) intakes as they don't flow as well. However, if chasing cones is the goal, a stiff chassis and a great suspension with moderate power should give you better results than great power and a moderate suspension. Somebody please correct me here if I'm wrong. Also, don't forget the brakes!

    Me, I haunt the local Craigslists for parts. I got a set of BBK shorty headers and an off road X pipe for $150. Cats are required where I live so I'm going to go with aftermarket cats on the pipes I already have. I got lowering springs, larger throttle bodies and plenums, front strut tower and rear shock tower braces, and other goodies cheap by being patient and keeping my eyes open. I tried to look up the class rules to see what you can do and not do but no luck, sorry. I would pass on used struts and shocks, unless you know their entire history and are 100% sure they are low mileage unabused pieces.
     
  18. searay86

    searay86 Active Member

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    SCCA Requirements (Page 71 start STP)

    To my understanding my only modification I can do is a cold air intake (I have a BBK CAI right now)

    I watch cragslist and facebook marketplace for parts everyday.. I have only found my CAI and s281 wing :(
     
  19. g36 monkey

    g36 monkey Moderator Staff SN95 Supporter

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    I thought it was a pretty limited class. I was thinking you would not be able to do much, if any of the mods, listed.

    A good set of shocks and struts and a good square 17x9 setup with 200 TW tires will help a lot.
     
  20. searay86

    searay86 Active Member

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    That's why I'm liking this class it's mostly stock cars with some mods. Any preferred struts? And is it better to stick with 9" all around than a staggered setup?