who else is running poly motor mounts?
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who else is running poly motor mounts? I put poly motor mounts on my car and noticed a LOT more vibration, especialy above 3k rpm's. I was wondering if this is normal, orif I have an imbalance issue with the new flywheel I got from Autozone. Any opinions are appreciated.
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From: St. Augustine, FL
I switched to a whole new motor and to a UMA K-member when I put in my polys soooo.... its hard to tell what did it. I do notice a little more vibration but, nothing real bad. Its felt more at idle than higher RPM. I have a dumped 3" exhaust and loud stereo so, I'm used to lots of noises as well so maybe I just dont notice it much.
I always thought most motors should smooth out as they rev higher... Are you saying that yours vibrates while driving and sitting still at high RPM or just while moving? If only while moving, it might be the driveshaft or U-joints. Just another thought.
I always thought most motors should smooth out as they rev higher... Are you saying that yours vibrates while driving and sitting still at high RPM or just while moving? If only while moving, it might be the driveshaft or U-joints. Just another thought.
Last edited by hyperzone; Aug 4, 2008 at 05:00 PM. Reason: typos
I put both the poly engine mounts as well as the tranny mount and did have some vibration, while driving. However, the new mounts changed the way the engine/tranny sat in the chassis, just a little, but enough to change the pinion angle. Once I readjusted the torque arm, the vibration went away.
If the vibration is significant, I'd be thinking flywheel....
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I can put the e-brake on, put the car in 1st, with the clutch in an once I rev it up it vibrates. Bad enough that I don't want to beat on my car( which is why I bought it). So it's not the drivetrain.
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I don't think it's your motor mounts, I have them in my car with a cam and it's a little "rougher" then the stock mounts but it still feels smooth at revs LS1 Tech Stories
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Did you put a new pilot bearing in when you did the clutch and flywheel swap, as this vibration could be caused by that?
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I don't think so, there are no scratches in the collectors. I think it's the Autozone fw. I will be pissed if it's bad. Better believe I will let them hear about it. The question is where do I get a good fw for cheap?
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From: St. Augustine, FL
I would recommend the spec billet steel flywheel. It is a little heavier than stock and balanced well. Not cheap though... Dont know where you will find a "CHEAP" NEW flywheel that is decent.
I agree!
Not to be sarcastic, but it sounds like you might have gotten a "cheap" flywheel already. Now you need a "good" one.
if you need a flywheel shoot our sales guys a call
I do believe you have more of an issue then the Poly mounts. They do increase some vibration over stock rubber, but nothing that should be a concern as you have noted.
good luck sorting it out
