Quote:
Originally Posted by wi54545
What wheels and tires are you running?
Stock 16" Fuchs 205/55/16 225/50/16
Is the existing body roll objectionable to you?
The car feels very loose. I would like it feel more firm in this area.
What ride height are you planning on?
I just measured the fender heights as it sits. I haven't touched the height personally. This height or slightly lower.
25.25" Right Front 24.75" Left Front
24.5" Right Rear 24.625" Left Rear
Do you want to increase, decrease or leave the over/under steer character of the car as is?
I just want it to be more confidence inspiring if I take it on track someday. My home tracks are Brainerd and Road America so longer straights and fast sweepers. Perhaps neutral to slight oversteer. Don't want bugs to be hitting the back window per say. I'm a novice that has completed DT in the M2 which is very easy to drive fast.
Thank you so much for the write up!
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You have several things that need to be addressed
1) nothing wrong w/ 205/55 & 225/50 perse but they really want 7 & 8s to get the most from them
2)when people say loose it usually means oversteer, I'm guessing that you meant it rolls more than you like which is normal for a stock suspension w/ at least ok tire grip
3) again just a wild a** guess but @25+/- " the car appears to have been lowered. By how much is hard to determine based on the data seen here, another WAG ~.5"
here's how to accurately measure front ride height on a 911
205/55 x 16 give an a of 11.9 to 12.2" , 303 to 308mm
a -b is he ride height, factory spec is 108+/-5mm, 120mm is lowered 12mm
stock over/under +/- a bit is where I'd stay, the more rear spring wrt the front the more oversteer, the more over the more the driver has to stay on top of the steering
20/25 t-bars puts you right where you are now, 20/26 a bit less under or more over depending on how you look at it, 20/26 gets rid of the most objectionable roll especially if you go from 20/18 to the late 22/21 roll baars, 20/27 more so and the suspension is getting uncomfortably harsh on anything but smooth roads, buyers choice here.