Finally got the full "kussmaul" settings - Car feels absolutely nuts now!!
10-19-2007, 05:31 PM
#1
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Finally got the full "kussmaul" settings - Car feels absolutely nuts now!!
So I picked up my car from the shop last night and now I finally have the suspension set to the full Kussmaul specs.
The last time we tried it and couldn't get the front low enough nor the camber to the specs. (couldn't get past -1.4dgr in the front).
That time I (and the shop) didn't know you can rotate the strut studs.
So now it's done and after driving it back home last nite, all I can say is WOW!!!
It completely transformed the feel of the car. The steering and the turn-in is so damn sharp now! It finally feels like what many here have been saying before, sharp as a scalpel, a real precision tool! By all means was it was it bad even before but the difference in the feel is just unbelievable!
I've got -2.8dgr camber in the front since that's the minimum now with the struts rotated. I may get less miles out of the street tires with this setup but I'm willing to sacrifice that for the feel & performance I get in return.
I can't wait for Sunday to take her out on the track again!!! Damn I love this car!
The last time we tried it and couldn't get the front low enough nor the camber to the specs. (couldn't get past -1.4dgr in the front).
That time I (and the shop) didn't know you can rotate the strut studs.
So now it's done and after driving it back home last nite, all I can say is WOW!!!
It completely transformed the feel of the car. The steering and the turn-in is so damn sharp now! It finally feels like what many here have been saying before, sharp as a scalpel, a real precision tool! By all means was it was it bad even before but the difference in the feel is just unbelievable!
I've got -2.8dgr camber in the front since that's the minimum now with the struts rotated. I may get less miles out of the street tires with this setup but I'm willing to sacrifice that for the feel & performance I get in return.
I can't wait for Sunday to take her out on the track again!!! Damn I love this car!
Last edited by Juha G; 10-20-2007 at 01:16 AM.
10-19-2007, 07:16 PM
#2
I've found that tires make a huge difference. My initial factory alignment felt squirrely and then I went to Kussmaul settings and r compound tires. What a huge difference. I thought it was the alignment but now that I've switched back to the PS2s, I see it was mostly the tires. My car feels sloppy again.
I think the PS2s have a much softer sidewall and contribute much to the unsettled behavior many us have felt in our cars. No doubt a good alignment helps get the car buttoned down but without good tires...I think there is only so much you can do...
YMMV.
I think the PS2s have a much softer sidewall and contribute much to the unsettled behavior many us have felt in our cars. No doubt a good alignment helps get the car buttoned down but without good tires...I think there is only so much you can do...
YMMV.
Last edited by Jim H.; 10-19-2007 at 07:18 PM. Reason: added info
10-19-2007, 08:28 PM
#3
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Sloppy with PS2's? Something isn't right. My car feels perfect on the PS2's- Sharp and stable. By the way why are you running an R compound tire with the stock suspension components? This adds an incredible amount more load and stress to components that were designed around the PS2 tire.
10-20-2007, 01:43 AM
#4
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I've found that tires make a huge difference. My initial factory alignment felt squirrely and then I went to Kussmaul settings and r compound tires. What a huge difference. I thought it was the alignment but now that I've switched back to the PS2s, I see it was mostly the tires. My car feels sloppy again.
I think the PS2s have a much softer sidewall and contribute much to the unsettled behavior many us have felt in our cars. No doubt a good alignment helps get the car buttoned down but without good tires...I think there is only so much you can do...
YMMV.
I think the PS2s have a much softer sidewall and contribute much to the unsettled behavior many us have felt in our cars. No doubt a good alignment helps get the car buttoned down but without good tires...I think there is only so much you can do...
YMMV.
10-20-2007, 01:43 AM
#5
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Thread Starter
Jim, when was the last time you had the car aligned? As I understand it, the suspension on the GT3 is somewhat lively and should be checked quite often.
I'm sure the R-comps make it even better but like Supermonkey said, the suspension was designed around street tires.
Yet, I think the next set I'm gonna put on my BBS wheels is MSPC's., for track use only of course..
I'm sure the R-comps make it even better but like Supermonkey said, the suspension was designed around street tires.
Yet, I think the next set I'm gonna put on my BBS wheels is MSPC's., for track use only of course..
10-20-2007, 10:08 AM
#6
Three Wheelin'
I went back to back with PS2s, then switched to cups on the track. It was a world of difference. The car felt more balanced and stable in the fast straights. I hated the car with PS2s.
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10-20-2007, 03:32 PM
#8
Juha,
Alignment is checked regularly and the last rubber change was immediately noticable in every respect. High speed sweepers, turn in, mid-corner adjustment, etc. all markedly diminshed with PS2s.
SuperM, I think R Comps are perfectly okay with the stock suspension. Slicks are another story...
Cheers.
Alignment is checked regularly and the last rubber change was immediately noticable in every respect. High speed sweepers, turn in, mid-corner adjustment, etc. all markedly diminshed with PS2s.
SuperM, I think R Comps are perfectly okay with the stock suspension. Slicks are another story...
Cheers.
10-20-2007, 03:43 PM
#10
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SuperM,
I've been running Yokohama A-048 R compound for track days and been very pleased with them. The only upgrade I've done to the suspension have been the TRG drop links and rear toe arms.
I don't have slicks because I drive to the track so the A-048 work out well other than the noise.
I've been running Yokohama A-048 R compound for track days and been very pleased with them. The only upgrade I've done to the suspension have been the TRG drop links and rear toe arms.
I don't have slicks because I drive to the track so the A-048 work out well other than the noise.
10-22-2007, 05:18 PM
#12
Can you describe exactly how you rotate the strut studs? I've also read about shims to make 2.5deg possible.
Thanks,
Mark
Thanks,
Mark
So I picked up my car from the shop last night and now I finally have the suspension set to the full Kussmaul specs.
The last time we tried it and couldn't get the front low enough nor the camber to the specs. (couldn't get past -1.4dgr in the front).
That time I (and the shop) didn't know you can rotate the strut studs.
So now it's done and after driving it back home last nite, all I can say is WOW!!!
It completely transformed the feel of the car. The steering and the turn-in is so damn sharp now! It finally feels like what many here have been saying before, sharp as a scalpel, a real precision tool! By all means was it was it bad even before but the difference in the feel is just unbelievable!
I've got -2.8dgr camber in the front since that's the minimum now with the struts rotated. I may get less miles out of the street tires with this setup but I'm willing to sacrifice that for the feel & performance I get in return.
I can't wait for Sunday to take her out on the track again!!! Damn I love this car!
The last time we tried it and couldn't get the front low enough nor the camber to the specs. (couldn't get past -1.4dgr in the front).
That time I (and the shop) didn't know you can rotate the strut studs.
So now it's done and after driving it back home last nite, all I can say is WOW!!!
It completely transformed the feel of the car. The steering and the turn-in is so damn sharp now! It finally feels like what many here have been saying before, sharp as a scalpel, a real precision tool! By all means was it was it bad even before but the difference in the feel is just unbelievable!
I've got -2.8dgr camber in the front since that's the minimum now with the struts rotated. I may get less miles out of the street tires with this setup but I'm willing to sacrifice that for the feel & performance I get in return.
I can't wait for Sunday to take her out on the track again!!! Damn I love this car!
10-22-2007, 05:28 PM
#13
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Thread Starter
But basically you just drop down the mcphersons, take the bolts on the top off and install them in the other available holes (the strut top has two hole patterns). This will rotate the struts 60 degrees and will make your camber range from approx. -2.5 to -4.0.
This is how the CUP cars come from the factory.
Send me your e-mail address with PM and I can send you the info package I sent to my shop. (a picture and description)
10-22-2007, 06:04 PM
#14
PM sent.
Thanks!
Mark
Thanks!
Mark
There's a thread on here somewhere regarding rotating the strut tops so just do a search on "rotate struts".
But basically you just drop down the mcphersons, take the bolts on the top off and install them in the other available holes (the strut top has two hole patterns). This will rotate the struts 60 degrees and will make your camber range from approx. -2.5 to -4.0.
This is how the CUP cars come from the factory.
Send me your e-mail address with PM and I can send you the info package I sent to my shop. (a picture and description)
But basically you just drop down the mcphersons, take the bolts on the top off and install them in the other available holes (the strut top has two hole patterns). This will rotate the struts 60 degrees and will make your camber range from approx. -2.5 to -4.0.
This is how the CUP cars come from the factory.
Send me your e-mail address with PM and I can send you the info package I sent to my shop. (a picture and description)
