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Registered
Join Date: Aug 2003
Location: Denver
Posts: 1,242
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Ride Height Front to Back ratio
I know that ride height is a personal preferrence, but, is there a general rule as to ratio from front to back. I have tail and chin spoiler installed however is there a proper relationship beteen front height and back?
For example, should the front be x inches (mm) higher or lower than the back? This is for a street car so I'm not concerned with track setup. Michael
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1999 996 C4 Cabriolet 1997 BMW M3 (Hail) 1985 928 S (Sold) 1982 SC Targa (Sold) |
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07-27-2004, 08:42 AM
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Registered
Join Date: Sep 2002
Posts: 3,580
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Fender height in front should measure 0.5 inches higher than fender height in the rear. This gives a 1-degree downward rake to the car.
According to Bruce Anderson.
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993 |
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07-27-2004, 08:58 AM
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Designer King
Join Date: Mar 2004
Location: Toronto, ON Canada
Posts: 5,499
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Measure up from the floor, or road surface, through the center of the wheel to the top of the wheel arch opening to get this dimension.
Bruce recommended 25.5" front and 25" rear for those using 15" x6 and 7" wheels and 195/65 front and 215/60 tires.
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Paul Yellow 77 Sunroof Coupe/cork interior; 3.2L SS '80 engine/10.3:1/No O2; Carrera Tensioners; 11 Blade Fan; Turbo tie rods; Bilstein B6; 28 tube Cooler; SSI, Dansk; MSD/Blaster; 16x7" Fuchs/205/50 Firestone Firehawk Indy 500s; PCA/UCR, MID9 Never leave well enough alone |
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07-27-2004, 07:56 PM
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Now in 993 land ...
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Read your bentley manual or the 101 projects book and go with the euro ride height. Measure from center of wheel to center of torsion bar for an accurate setting. Fenders, tires and wheels can lead to large errors in fender lip to floor measurements. HTH,
George |
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07-27-2004, 08:06 PM
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Registered
Join Date: Jun 2004
Location: Los Alamos, NM
Posts: 390
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Before I lowered mine last summer, I went around measuring the fender heights of all 911's I could. The lowest I found was 24" F 24.5" R. There were several clustered around the so-called Euro height of 25.5 F 25 R. I finalled settled on 25 F 24.5 R and have been happy (car started at 26.25 F 26.75 R !!!). Two comments:
1. I have to be very careful in and out of some parking lots. 2. I could not reach factory specs for camber, had settle for a little more negative. After more reading this sounds like a good thing and I plan to go even a bit more negative at some point. I recommend corner balancing after lowering, if you can find some wheel scales. Also, I could never make sense out of the Bentley method of measuring ride height.
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Scott Wilburn 1988 911 Carrera 3.4 L 1998 M3 1984 308 QV |
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07-27-2004, 09:34 PM
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Now in 993 land ...
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Quote:
It's easy. Measure wheel center to floor. Measure center of torsion bar to floor. Subtract. And voila, there is your ride height. This method takes all the body variation out, also, the wheel center doesn't care what tires, rims, inflation etc. you run. All you need is a flat and level surface to work on. Cheers, George |
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07-27-2004, 09:43 PM
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