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blabla914 |
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#1
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I like primer ![]() ![]() Group: Members Posts: 321 Joined: 1-March 04 From: Connecticut Member No.: 1,740 Region Association: None ![]() ![]() |
OK. I'm going to try to make a long story short.
Last winter I did a six conversion to a 2.0L six with a rich johnson front mount with the club sport mounts. I am also using club sport mounts at the back. I originally fitted the car with a sport muffler. I finally replaced the sport muffler with a Bursch a few weeks ago. While the sport muffler sounded great I tired of my ears ringing for about 20 minutes after getting to/from work. I'm surprised my neighbors weren't throwing rocks at me, especially on those early sunday mornings on my way to an autocross. Now that I've got a muffler that actually muffles I've noticed the car has a bit of a resonance at precisely 1900 and 2300 rpm. You kind of hear a waaaaaaaaaaa type noise and you can feel a little vibration. Is this just the hard mounts transmitting some vibration to the car and resonating at these specific rpms or do you think I really have a problem? Thanks for your help. Kelly |
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914GT |
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#2
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Senior Member ![]() ![]() ![]() Group: Members Posts: 1,100 Joined: 11-October 04 From: Tucson Member No.: 2,923 Region Association: Southwest Region ![]() |
The list is getting smaller. I'm not familiar with a 6 - how tough is it to slip the belts off the fan and alternator (or anything else) then rev the engine up? (not for long of course) Just to rule-out any belts and accessories. If you have vibration down at the base motor then sure points to the rotating assembly. Double-check those mounts, try to lift the motor or move it around to see if there's any excessive movement. You've probably already done that though. Good luck Kelly I hope you find it and hope it's something easy to fix.
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