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Old 08-06-2014, 01:57 PM   #1
Tuurtje
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Rebound.

My recently purchased '10 ls3 manual, with 22' and BC type BR coilovers feels like it kicks me out of my seat if I go a little to fast over a bump.

I took them out and adjusted the spring according to factory specs. Set the damping to 17 klicks, which is a little over halfway. It's a lot better, but still have the feeling it isn't 100 %.

When driving fast it even feels unsafe. I've got plenty of racing experience, including 2 stroke karting, but I can't figure out how to get the right setup.

I've got a few trackdays in August but don't want to race it like this.

Any input is welcome...
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Old 08-06-2014, 03:21 PM   #2
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Quote:
Originally Posted by Tuurtje View Post
My recently purchased '10 ls3 manual, with 22' and BC type BR coilovers feels like it kicks me out of my seat if I go a little to fast over a bump.

I took them out and adjusted the spring according to factory specs. Set the damping to 17 klicks, which is a little over halfway. It's a lot better, but still have the feeling it isn't 100 %.

When driving fast it even feels unsafe. I've got plenty of racing experience, including 2 stroke karting, but I can't figure out how to get the right setup.

I've got a few trackdays in August but don't want to race it like this.

Any input is welcome...
From posts I have seen street settings are in the 10-15 range,or softer depending on your comfort level. Not sure what yours are doing or where they were set before, also the 22" tires wont help with ride either, especially with the stiff springs the coilovers come with.
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Old 08-07-2014, 03:55 AM   #3
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I don't mind a hard ride, it isn't driven a lot. I want to know what the wheels are doing on the road.

We went to Germany a week ago where it is alowed to drive Vmax. There was a bump when doing 200km/h. I almost lost "my precious" It felt like the rear had no contact with the road any more.

Even speedbumps in my town, when taking to fast, kicks me out of the seat. It feels like I have to little damping when the springs return to their start position...
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Old 08-07-2014, 07:15 AM   #4
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If you are being kicked out of the seat upon hitting the bump, the issue is likely a high compression rate. For street driven vehicles I like to valve the shocks/struts really soft on compression (let the spring do the job of soaking up the bump), then have a decent amount of rebound (let the shock slow the oscillation of the spring).
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Old 08-07-2014, 07:37 AM   #5
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Forgot to mention that it's lowerd. In going is hard but good, out going is to fast. Spring preload is set at factory specs.

This morning I went for an alingment, it wasn't out of factory specs a lot, but did it anyway. Front and rear. Rear camber was a little out, and toe wasn't a straight zero.

Now the rebound, is again a little better but the steering isn't as sharp as it was.
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Old 08-07-2014, 11:51 AM   #6
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How much have you lowered the rear?
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Old 08-07-2014, 03:43 PM   #7
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Don't know what the original height is but this is how it looks like now. It has the same diameter as original. I run 22" with pirelli zero nero 315/25 - 22.
The height measured from the floor up to the edge of fender = 71 cm which is approx. 27.95 "
The tires don't rub the inside of the fender and the coilovers still have some thread left for lowering even more. I could get the tires within alignment specs with oem bolts...

Last edited by Tuurtje; 08-07-2014 at 04:17 PM.
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Old 08-09-2014, 03:42 AM   #8
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Took the coils out again and changed them from left to right, to see if I could notice a difference. Same all over, what could be the issue ???

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Old 08-09-2014, 08:40 AM   #9
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Raise you ride height 20 to 30mm. You are so low thee rear upper control arms run out of travel.
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Old 08-09-2014, 10:38 AM   #10
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It could be the 22" with the lack of profile on the tires.
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Old 08-09-2014, 11:58 AM   #11
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It is the ride height.
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Old 08-09-2014, 02:02 PM   #12
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Thanks everyone, especially JusticePete. It was the ride height. I gave the wheels an extra 18 mm of travel. It now is the way I want the rear to give feedback. Don't know if I'm going to do the front also or let it have this wedge shape look.

Looks good though.

Picture coming up.
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Old 08-09-2014, 02:29 PM   #13
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