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Location: So California
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hard ride on pavement, Tire problems? Need Advise.
I just had my 89 lowered and aligned with a bump steer kit installed. The ride is stable and tracks well but i can feel every crack and bump in the road. This condition existed before the lowering and alignment.
I am running 205/50/17 fronts and 255/40/17 rears Bridgestone Potenzas. My shocks are stock Bilstein and are 2 years old. What could the problem be???? Tires???? Balancing???
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89 Carrera Cab Last edited by rjb; 10-31-2005 at 06:43 PM.. |
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10-31-2005, 06:29 PM
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89 Carrera Cab |
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10-31-2005, 06:51 PM
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Re: hard ride on pavement, Tire problems? Need Advise.
Quote:
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Matthew “Sometimes the questions are complicated and the answers are simple.” |
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10-31-2005, 06:58 PM
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Mine is the same, what a great feeling ....
Bump. |
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10-31-2005, 07:31 PM
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Used Up User
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I'm very far from an expert, but you are running 17" tires 50 & 40 profile. That is part of your hard ride problem. What Bilsteins? HD or Sport? That's probably another.
To reverse the trend go back to 16" wheels with bigger profile (more air) tires. Softer Boge shocks. Etc. But you will lose the go-kart feel. Ian
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'87 Carrera Cab ----- “Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.” A. Einstein ----- Last edited by imcarthur; 11-01-2005 at 03:19 AM.. |
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10-31-2005, 07:41 PM
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Location: Austin, TX
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Yep... sportscars are supposed to be stiff and bumpy. I'd go with imcarthur's suggestions if you want to soften it up a little bit.
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Matt J. 69 911T Targa - "Stinky" 2001 Boxster "Stahlgewehr" |
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10-31-2005, 08:02 PM
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I'd recommend going to 15" wheels, the cheapest nastiest shocks you can buy at Kragens, and maybe you can find some torsion bars that are softer than stock!
ianc
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BMW 135i. Nice. Fast. But no 911... "I will tell you there is a big difference between driving money and driving blood, sweat and tears." - PorscheGuy79 |
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10-31-2005, 08:09 PM
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Location: Los Angeles
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What was it Jay Leno said when he was doing the Carrera GT speed test with David Donohue? Something like: "When you run over a dime with this car, you can tell whether it's heads or tails."
 (But the answer is probably your tires, tire pressures, or whoever repairs your local streets.)
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Jack Olsen 1972 911 My new video about my garage. • A video from German TV about my 911 |
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10-31-2005, 08:21 PM
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This has got to be a tongue-in-cheek post.
It's a sports car. If you want soft, then you've got the wrong type of car. Maybe a Mercedes might be better, eh? Stiff suspension. Stiff sidewall, low profile tires. These give a car great handling but a cruddy ride. |
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10-31-2005, 08:49 PM
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Check your tire pressures. Drop them a little to soften the ride.
Simon
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85' Carrera 3.2 02' Mazda MX5 |
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10-31-2005, 08:54 PM
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Bird. It's the word...
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Check your tyre pressures... they may have been pumped up too much
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John Forcier Current: 68L 2.0 Hotrod - build underway |
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10-31-2005, 08:55 PM
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tough group...
when did the suspension feel change? or has it always been like this? how long have you owned the car? did you move recently? and could different roads than you are used to be causing this? have you driven other 911s to compare? have other 911 owners driven yours to comapre?
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"A man with his priorities so far out of whack doesn't deserve such a fine automobile." - Ferris Bueller's Day Off |
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10-31-2005, 09:04 PM
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Location: bay area
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How old are your tires?
I had the same complaint with my car a little while ago. I had SO3s that were just about worn out. I decided to try a set of Avon M500s. Tire Rack got better times around the track with the Avons then they did with the SO3s and the Avons give a MUCH better ride. The tires were the only thing I changed and the car is great deal more comfortable now. A night and day difference really. I was actually suprised at how different. It seems as tires get older or even as their tread wears down the ride quality deteriorates. I like the other suggestions that have been offered but if new tires will get you what you want that would be ideal because you wouldn't have to trade away too much handling for comfort. I live about 30 minutes north of the city if you ever want to ride in a 911 with a stock set up and 16" Avons for comparison. |
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10-31-2005, 09:28 PM
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drag racing the short bus
Join Date: May 2002
Location: Location, Location...
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rjb - where do you live in So. Cal. If you drive...say...the 170 North through North Hollywood up to the other side of the San Fernando Valley, any car that has "sport" attached to its definition of purpose will have a rough ride. It's just the nature of a freeway assembled like a Hot Wheels track.
Metro L.A., well, everyone knows those roads suck! But if you need to examine something on your car, I'd take a stab at bushings...
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The Terror of Tiny Town |
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10-31-2005, 09:31 PM
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Large Registered Member
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How low did you go?
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'85 Carrera Coupe, Marble Grey #118 JP/R6 '93 Lexus SC400, '00 Ford F-150 '70 911T- 2.7 (SOLD) |
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10-31-2005, 09:43 PM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,330
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this has got to be a joke.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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10-31-2005, 09:57 PM
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Location: Novato, CA
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Ah, give the guy a break; he's only got 38 posts. He just hasn't figured out what kind of car he really wants yet.
ianc
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BMW 135i. Nice. Fast. But no 911... "I will tell you there is a big difference between driving money and driving blood, sweat and tears." - PorscheGuy79 |
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10-31-2005, 10:16 PM
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Another reason I'm keeping my Boges and 16" rims.
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10-31-2005, 10:24 PM
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Location: SC - (Aiken in the 'other' SC)
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Grab the top of each wheel and push it back and forth to see if the wheel bearings are loose. If your wheel bearings are too loose it will give the ride an extremely tooth rattling quality.
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- "Speed kills! How fast do you want to go?" - anon. - "If More is better then Too Much is just right!!!" - Mad Mac Durgeloh -- Wayne - 87 Carrera coupe -> The pooch. |
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11-01-2005, 01:29 AM
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1979 Porsche 911 SC (ROW) Rebuilt 3.0
1985 Porsche 911 Carrera 3.2
1987 Porsche 911 Carrera Cabriolet 3.2
1984 Porsche 911 Carrera Cabriolet
2007 Porsche Cayman
2000 Porsche Carrera
1969 Porsche 911T 2.7RS Spec with Webbers
