Road Racing / Autocross & Time Attack Road Racing / AUTOX, HPDE, Time Attack

bumpstops

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Old Jul 5, 2007 | 12:39 AM
  #1  
Weel's Avatar
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Default bumpstops

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Last edited by Weel; Jan 28, 2021 at 04:15 PM.
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Old Jul 5, 2007 | 03:22 AM
  #2  
ewaugh's Avatar
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From: Birmingham, AL, USA
Default Re: bumpstops (Weel)

You either need more compression in the shock or a stiffer spring. How much travel do you have before the bump stop and what rate springs?
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Old Jul 5, 2007 | 09:49 AM
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577HondaPrelude's Avatar
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Default Re: bumpstops (ewaugh)

also let us know how big the bump stops are.
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Old Jul 5, 2007 | 02:29 PM
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Johnny Mac's Avatar
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From: Cerritos, CA, USA
Default Re: bumpstops (Weel)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Weel &raquo;</TD></TR><TR><TD CLASS="quote">I am running EK suspension height and damper with eg neuspeed springs, I keep hitting the front bump stops which I hear cause bad understeer. I have raised car up about 20mm but still hits, is this because I should be running ek springs</TD></TR></TABLE>

If your car is sitting at the appropriate ride height and you're still hitting the bump stops, then you need more spring rate in the front and possibly updated shocks to handle the larger spring rates. If you are slammed and are too low, then raise the car and see if that cures the problem. And yes, hitting the bump stops in the front can cause bad understeer as the load is abruptly transferred from the inside front wheel to the outside front wheel. The same basic principle should be followed for the rear of the car, but since less weight is at the rear, generally you won't have any issues with hitting bump stops unless your car is too low.
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