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Hoyo Hoyo is offline
Registered User
Join Date: May 2010
Location: in my mind..Myrtle Beach
Posts: 50
Flap flap flap......

I always thought the exhaust needed to be replaced. The car makes that flapflap sound under boost. The guy at the dyno told me the exhust was making to many sharp turns combined with 3.5 inch tubing would make that sound. Now i know different.

I just very recently had to replace the 915 with a 930 trans due to 915 failure. The guy who fitted the -86 930 told me that the flapflap sound is because leakage between top and cylinders.
This may explain the low 280rwhp.

I assume next step is to find out why.

Old 11-18-2011, 09:20 AM
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