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Car spins terribly after installing bmr springs and stickier tires

Discussion in 'Driveline/Suspension' started by *Predator*, Oct 4, 2018.

  1. *Predator*

    *Predator* Member Established Member

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    So my car is a 14 gt m6 pretty much stock with off road X-pipe and corsa extremes. I installed the BMR Performance springs which are supposed to be a balance of a drag spring and daily spring. Also installed adjustable panhard bar and LCA relocation brackets along with some Rovos Durban wheels with Michelin pilot super sport tires. Tires are much softer then stock and are 275/35/20 so much wider as well. Yet suddenly after these mods the car barely transfers and even from a 2nd gear roll of I stab it it blows the tires off. What's going on? Hooked up better on the skinny ass stock pirelli rubber bands ...
     
  2. *Predator*

    *Predator* Member Established Member

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    Crickets . ... .
     
  3. tones_RS3

    tones_RS3 I like members members. Premium Member Established Member

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    I don't think it's the width of the tire making you spin, because the wider the better to put the power down.
    I think it may be the style tire you have back there. Have you tried a sticker tire?
     
  4. sono

    sono Active Member Established Member

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    Sounds like the springs are stiffer. Double check the rates. Stiff = spin






    =
     
  5. *Predator*

    *Predator* Member Established Member

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    As stated tires way softer. The springs do seem really stiff. Supposed to be a drag spring but also good for street . Guess that's a false advertisement ..
     
  6. paulyboy928

    paulyboy928 Active Member Established Member

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    Huh... I have the sport springs, relos, and mpss and the traction is great. I do have 295/35/19s, though. Are you tires warm? Also, what type of pavement do you drive on?

    Keep in mind it's almost impossible to completely eliminate spinning and hook each time you do a pull. I still find myself spinning from a 2nd gear roll on certain occasions.
     
  7. *Predator*

    *Predator* Member Established Member

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    It's something in the suspension Gotta be these springs are just too stiff. Car doesn't even transfer with them on.
     
  8. clinton2003

    clinton2003 Active Member Established Member

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    If those springs lower the car your angles get all messed up. May need some lca relo brackets and/or adjustable upper or lower control arms to help get the angles back where they need to be.
     
  9. DSG2003Mach1

    DSG2003Mach1 Well-Known Member Premium Member Established Member

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    he says he has the lower arm relocation brackets, if theyre adjustable Im guessing wrong hole

    OP why dont you try calling BMR, I thought they were supposed to have good support
     
  10. clinton2003

    clinton2003 Active Member Established Member

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    must have missed that. Everything else is still relevant though.
     
  11. Reaper14

    Reaper14 Active Member Established Member

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    I have yet to hook on 20s, I dont even try any more. It gets side ways

    Sent from my SAMSUNG-SM-G928A using the svtperformance.com mobile app
     
  12. *Predator*

    *Predator* Member Established Member

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    Both times tried calling no answer and voicemail is full. Will try again tomorrow if open. I'd think the relocation brackets should correct the pinion angle from lowering
     
  13. *Predator*

    *Predator* Member Established Member

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    Right now I have the control arms in the middle relocation bracket hole. Is there certain setups that the top or bottom hole. Is a better idea?
     
  14. scotmach

    scotmach Active Member Established Member

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    The bottom hole wouldn't work as it will hit the tires to hard. You want the control arms either parallel or slightly lower in the rear.

    Those tires also aren't helping. Not nearly enough side wall.
     
  15. paulyboy928

    paulyboy928 Active Member Established Member

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    Try the top hole. That's where mine is.
     
  16. *Predator*

    *Predator* Member Established Member

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    Tried top hole. Stock control arms won't fit in top hole. Guess in ordering some BMR lowers.
     
    Last edited: Oct 9, 2018
  17. *Predator*

    *Predator* Member Established Member

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    Tires are more then adequate. I had nitto street tires on the same size wheel before on my 11 gt and it hooked up way better. These tires are much stickier on a car making much less power. That car was on stock springs though. It actually transfered.
     
  18. clinton2003

    clinton2003 Active Member Established Member

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    you change one thing, you have to correct the rest of the suspension. you may need some adjustable shocks to compliment the springs.
     
  19. sur_real1

    sur_real1 I Am The Organizer Established Member

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    Spinning is going to be hard to avoid with your setup. 275/35/20 Michelins may have a stickier compound tire, but has a much harder sidewall. So, it's not going to be forgiving at all for taking off from a dead stop, however, they are more designed to keep you out of the ditches in the corners. Springs and lower control arms are only part of the battle. Your roll center in the rear is still pretty high with a stock mount height panhard bar (adjustable or not). Also, when you lower the car, you lower the roll center in the front as well. If you want to stick out of the hole, either go with a taller and softer sidewall tire in the rear or its start to dig into setting your suspension geometry with some more adjustable pieces. Cortex does a great talk on anti-squat and anti-dive on youtube through /Drive. I'd recommend checking that out.
     
    Last edited: Oct 7, 2018
  20. scotmach

    scotmach Active Member Established Member

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    I guess you have everything figured out then. But you were the one looking for advice.
     
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