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Suspension & Braking Forum by BimmerWorld
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Old 11-01-2012, 02:34 PM   #1
ajai
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Will over stiff coilover decrease grip on bumpy cornering?

Whenever I corner and if the corner is bumpy . The car feel it decrease in grip.
will it because the car is drop low or the coilover damper turn too stiff therefore the car might jump off the road a bit??
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Old 11-01-2012, 11:52 PM   #2
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Please help solve out the problem guys
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Old 11-01-2012, 11:59 PM   #3
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Its not that simple but if you make the springs stiffer in one end of a car that end usually loosens up/slides easier.

Stiff shocks, more tire pressure, different tirs all add up.

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Old 11-02-2012, 07:57 AM   #4
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Quote:
Originally Posted by dwtaylorpdx View Post
Its not that simple but if you make the springs stiffer in one end of a car that end usually loosens up/slides easier.

Stiff shocks, more tire pressure, different tirs all add up.

Dave
My coilover have 8k springs I believe . Front dampen have been set to 18 hardness. Rear 15. Will that cause problem ?
Also my tire is 28lb front 29lb rear. Dunlop star z1 225/40/18

Is it hard to make a car in air? Since on bumpy road my car jump up...
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Old 11-02-2012, 11:10 AM   #5
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The short answer is yes! When I had PSS9 on full soft there were no issues. When set to full stiff the car, especially in the rear, would bounce around rough corners severly! It appears that your car is very low with very little suspension travel and a very stiff setup. You've created a monster!
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Old 11-02-2012, 03:35 PM   #6
ajai
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The short answer is yes! When I had PSS9 on full soft there were no issues. When set to full stiff the car, especially in the rear, would bounce around rough corners severly! It appears that your car is very low with very little suspension travel and a very stiff setup. You've created a monster!
Thanks for reply! I will try to soften it a bit more to see.
Since when I go through rough corners, sometimes I get bounce and understeer off the apex..
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Old 11-02-2012, 04:42 PM   #7
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Understeer off the apex? I'm stiff and low but get oversteer out of the apex. Try adjusting your damping to correct for this. I think you want a stiffer rear for oversteer.
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Old 11-02-2012, 05:54 PM   #8
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There are many factors to consider. I'm running considerably more spring than you in the rear and I have no such problem. In fact, I have less problem with the rear end hopping around over bumpy corners than I did with the stock ZHP setup. Damper capabilities and adjustment make a huge difference as does the overall balance of the car. 8k springs front and rear doesn't sound like an ideal setup to me but there are too may unknowns to be able to resolve your issues. If adjusting the dampers doesn't solve things, you need to find a good local suspension tuner.
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