Vibrations at 1800 RPM's
06-10-2005, 09:15 PM
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Originally Posted by tippmann243
if it was a bent crank it would get worse with higher rpm
how about you elaborate more on your "vibration"
where is it comming from and so on
how about you elaborate more on your "vibration"
where is it comming from and so on
My vibration is when reving the engine up and while the rpms are coming back down. This vibration is there while I am driving or sitting in neutral around 1800 to 2000 rpms. But I think it is from my pressure plate and flywheel being balanced together and I have changed things since they were balanced so I am not sure... I am in the middle of a T56 swap and nothing is going right.... just looking at all of the problems that are going on...
06-10-2005, 11:50 PM
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well just think of it this way if its out of balance at low speeds most of the time its going to get worse with more speed
you may want to check your exhaust and motor mounts or maybe a driveshaft
other than that im stumped
you may want to check your exhaust and motor mounts or maybe a driveshaft
other than that im stumped
06-11-2005, 10:02 AM
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Originally Posted by tippmann243
well just think of it this way if its out of balance at low speeds most of the time its going to get worse with more speed
you may want to check your exhaust and motor mounts or maybe a driveshaft
other than that im stumped
you may want to check your exhaust and motor mounts or maybe a driveshaft
other than that im stumped
Driveshaft is brand new, and hd aluminum and has been balanced. Exhaust has just been re-worked due to the T56 swap.
06-11-2005, 10:26 AM
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vibration I had a similar vibration while sitting still with the clutch in or out. It would vibrate bad at 1000 and about 1800. My problem was the balance with the flywheel and pressure plate. Had a new Aussie clutch installed that had each part individually balanced and the vibration is completely gone away.
06-11-2005, 11:03 AM
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Originally Posted by paulcars
I had a similar vibration while sitting still with the clutch in or out. It would vibrate bad at 1000 and about 1800. My problem was the balance with the flywheel and pressure plate. Had a new Aussie clutch installed that had each part individually balanced and the vibration is completely gone away.
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06-12-2005, 05:26 AM
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I have a simular problem, but mine is from 2000 to 2200 rmps, its durring acceleration, deceleration and if i hold it at that rpm band.... but i only feel it if i got my hand on the shifter, if i dont the car feels just as smooth as any other rpm range... go figure, but i am interested to see if oyu find and answer to your problem. oh by the way i got a B&M short throw, Spec stage 2 clutch and steel flywheel.
06-13-2005, 06:30 AM
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yeah... Spec told me on the phone that they balanced the clutch and flywheel at the factory before shipping it out. So i couldnt figure out where my vibration was coming from (also in the 1800 2000 rpm range) because I did a bunch of mods around the same time. But I put a new balanced clutch in recently and the vibration went away so... Dont take the manufacturers word that your clutch and flywheel are balanced and also... I dont remember enough from physics class to clearly explain the harmonics of rotational forces, but from my personal experience and from what i've read on here... clutch/flywheel vibrations that are caused by imbalance are often more noticable at certain rpm's and dont always get worse with higher rpm.
06-13-2005, 03:11 PM
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Originally Posted by OldeSkool
yeah... Spec told me on the phone that they balanced the clutch and flywheel at the factory before shipping it out. So i couldnt figure out where my vibration was coming from (also in the 1800 2000 rpm range) because I did a bunch of mods around the same time. But I put a new balanced clutch in recently and the vibration went away so... Dont take the manufacturers word that your clutch and flywheel are balanced and also... I dont remember enough from physics class to clearly explain the harmonics of rotational forces, but from my personal experience and from what i've read on here... clutch/flywheel vibrations that are caused by imbalance are often more noticable at certain rpm's and dont always get worse with higher rpm.
06-13-2005, 04:39 PM
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Oh yeah, i know its a bummer.. Being short on cash, i lived with vibration for 30 thousand miles... when i did replace the clutch, i had a new rear main seal put in incase the out of balance flywheel/clutch wore it more than usual (probably a good idea considering its low price)
