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Registered
Join Date: Jul 2019
Posts: 147
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Front suspension tune up 1988 3.2
Hi,
the right side of the car (left = driver) is sitting 0.5 cm (1/5th of an inch) lower than the left side when measuring from ground to wheel arch...and I really feel that, the car pulls heavily to the right when I don't touch the steering wheel. (and strangely, it makes a loud low sound when steering to the left or straight, and that sound dissappears when turning to the right - where the car 'wants' to go if I would not control the steering wheel). How does the front suspension tuning work ? turning the adjustment screw 'clockwise' will lower that side ? or the opposite ? I don't understand how it works... And when does one know that the range of the adjustment screw is not enough, and that you have to change a spline on the torsion bar ? (30 splines = 12°) Strangely, the adjustment screw left AND right is at the exact same position when measuring the position of the screw, but still the car has not the same height left and right when comparing the wheel arches... Thank you for your advice, or a link to an explaining youtube video or whatever... |
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06-01-2024, 09:44 AM
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I doubt that your pulling symptoms and low sound are related to the ride height.
If the corner heights were adjusted for equal weights side to side (corner balancing), the factory allows for +- 5mm difference side to side. These chassis are simply not that precise. The more likely cause of pulling is incorrect alignment, or possibly worn tires. The loud low sound is usually a symptom of a bad wheel bearing, typically in the rear. To answer your question about front height adjustment, turning the screw clockwise will raise that side. There is no requirement for the screws(or corner heights) to match side to side. |
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06-01-2024, 11:58 AM
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Quote:
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06-01-2024, 08:20 PM
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PCA Member since 1988
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Differences in height measurements, left to right, at the fenders are common.
Get the car off the ground and rotate the wheels by hand to see if there's binding or excess friction at one wheel
__________________
1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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06-01-2024, 10:34 PM
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Join Date: Jul 2019
Posts: 147
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In my simple mind, the rear wheels were only 'followers' that always run straight forward, and that front steering left or right did not really affect the inner bearings on the rear side...but that is where the strange noise is coming from...so
all your suggestions do make sense , for which I'm grateful. Many thanks, will try to feel what wheel is dragging more than the other, but nevertheless have both of these bearings changed out of safety measure. Best regards G |
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06-01-2024, 10:53 PM
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Senior Member
Join Date: Sep 2001
Location: Chesapeake, VA
Posts: 1,699
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After driving, put your hand on the wheel and see if the caliper is hot. A dragging brake will cause a pull as well. Also recommend you have someone measure while you are sitting in the driver's seat.
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Chris 1988 911 Carrera Targa (driving project started JAN 2022) 1970 911E - Long since gone 1972 911 Targa - gone 1987 911 Carrera - gone Retired FA-18C Driver |
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06-04-2024, 02:48 AM
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Radial tire pull is also common to tire pros. Swap the front tires to see if it changes
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06-04-2024, 05:26 AM
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Wicked Witch of the East
