wierd resonance, anybody else have this? |
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wierd resonance, anybody else have this? |
blabla914 |
Nov 4 2004, 07:29 PM
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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 |
914GT |
Nov 5 2004, 08:47 AM
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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 |
Kelly, was the engine balanced? Also, rev the engine up to 1900 in neutral, with and w/o clutch engaged to see if it's the same.
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