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Vibration at 1600rpm
Has anyone experienced this? What to check first?
74' 911 2.7 Right at 1600rpm on normal take-off, I get a vibration/rumble from the rear. If I take off in traffic, low rpm and after clutch is engaged, I can feel/hear it. It just started, doesn't seem to be getting worse. The only mods have been short shift kit. Am I just now noticing something that has always been there? Am I launching too low RPM's??? Thanks, ???paul???
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If you aint breakin' it, you aint racing it hard enough! 1974 911 3.0 Euro Sahara Beige/Black Last edited by Pkaaso; 07-03-2005 at 03:09 PM.. |
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07-03-2005, 03:07 PM
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Low RPM Vibration.....
If your car still has one of the rubber center clutch discs, a chunk of rubber might have come out and gotten lodged on one side of the pressure plate. I had this happen on a 1988 924S. The fix is a new clutch.
Good Luck!
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FEC3 1980 911SC coupe "Zeus" 3.3SS god of thunder and lightning |
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07-03-2005, 03:24 PM
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I did replace the disk with a spring type when I had the engine out last time.
Thanks, Paul
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If you aint breakin' it, you aint racing it hard enough! 1974 911 3.0 Euro Sahara Beige/Black |
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07-03-2005, 03:35 PM
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Non Compos Mentis
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Keep it above 1600 rpm. Way above.
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07-03-2005, 03:44 PM
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Paul, get John over for a test drive...
Did you get those tires yet? |
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07-03-2005, 03:52 PM
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Scott,
I'll have to get him to drive it to get his oppinion. I just don't remember that vibration being there before. But, I always took off at about 2500 to 3000 rpm. It' just when my daughter is riding with me, I like to really take it easy. I know, I know... These cars arn't meant to be taken easy. No, tires are ordered but not mounted yet. I have been struggleing with the idea of having the rims polished by AL REED first. But then, I've been told that is not the best idea as the polish is only good for about a year or so. I think I will have the rims cleaned and repainted back to stock. What do you think? Paul
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If you aint breakin' it, you aint racing it hard enough! 1974 911 3.0 Euro Sahara Beige/Black |
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07-03-2005, 10:56 PM
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By-the-way
What is the best rpm to take off at? Under normal traffic conditions? Too high... wearing clutch Too low... lugging engine What to do to die today?
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If you aint breakin' it, you aint racing it hard enough! 1974 911 3.0 Euro Sahara Beige/Black |
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07-03-2005, 10:58 PM
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Prolly go with the Toyo Proxes 4 these are replacing the FZ-4
Good price and seems to be a good tire.
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If you aint breakin' it, you aint racing it hard enough! 1974 911 3.0 Euro Sahara Beige/Black |
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07-03-2005, 11:01 PM
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i notice this same shudder when i'm backing out of my driveway..i just release the clutch while under very little power and i often feel a shudder. sounds like the same thing..just the clutch slipping a little maybe.
ryan
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To the memory of Warren Hall (Early S Man), 1950 - 2008 www.friendsofwarren.com 1990 964 C4 Cabriolet (current) 1974 911 2.7 Coupe w/sunroof 9114102267 (sold) 1974 914 2.0 (sold) |
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07-03-2005, 11:06 PM
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Gon fix it with me hammer
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chain tensioners ok ?
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07-04-2005, 02:54 AM
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I use about 1,400 to 1,500 or so and tend to get a little shudder from the clutch but the car comes off of a dead stop easily that way. Doesn't seem to be a big deal.
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07-04-2005, 12:58 PM
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I'm off the clutch completely by the time I feel the vib/rumble.
Still not sure what I'm feeling/hearing. Chain tensioners are rebuilt and added the collar. Paul
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If you aint breakin' it, you aint racing it hard enough! 1974 911 3.0 Euro Sahara Beige/Black |
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07-04-2005, 03:00 PM
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paul,
hmm..have you checked your motor mounts lately? ryan
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To the memory of Warren Hall (Early S Man), 1950 - 2008 www.friendsofwarren.com 1990 964 C4 Cabriolet (current) 1974 911 2.7 Coupe w/sunroof 9114102267 (sold) 1974 914 2.0 (sold) |
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07-04-2005, 03:08 PM
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Ryan
No, I have not. I'll look at those tomorrow. Thanks, Paul
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If you aint breakin' it, you aint racing it hard enough! 1974 911 3.0 Euro Sahara Beige/Black |
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07-04-2005, 04:21 PM
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Maybe I'll just replace everything connected to the gas cap.
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If you aint breakin' it, you aint racing it hard enough! 1974 911 3.0 Euro Sahara Beige/Black |
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07-04-2005, 04:22 PM
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Zeus (god of thunder and lightning)
1984 Porsche 911 Carrera Cabriolet
2007 Porsche Cayman
2000 Porsche Carrera
1974 Porsche 911 2.7
BimForce the Third, Esquire
