Car started 2 whistle after intake install
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Joined: Mar 2008
Posts: 84
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From: Laplace Louisiana
Car started 2 whistle after intake install
Do anybody know if its normal for my C5 to whistle after install a fast manifold intake. I did buy knew gasket and car idles fine. Car did pick up a couple tenths at track but whistle when r.p.m.'s goes up. I checked for leaks with carb cleaner all checked out good.
Drifting
Joined: Jan 2006
Posts: 1,372
Likes: 2
From: Ramona CA
That's the downside of the FAST intake. Both my son-in-law and I upgraded our rides to ZO6. I used the GM LS6 intake - no whistle. He used the FAST - it whistled. The FAST comes in 2-3 parts. He had to take it apart a few times to get the whistles at the corners out.
Weiand has anew single unit that is better than the FAST.
Weiand has anew single unit that is better than the FAST.
Racer
Joined: Mar 2008
Posts: 263
Likes: 0
From: 300 ft AGL Wilmington NC
dont know what to make of it, but i have my stock LS6 manifold and as i depress the throttle, i hear a high-pitched wistle also. not sure if we are talking about the same sound, but, my two cents.
Burning Brakes
Joined: Aug 2007
Posts: 756
Likes: 1
From: Oakton Virginia
It may not be a vacuum leak. Air tumbling over a sharp edge can cause a whistling sound. I put a BBK on my Z28 and intitally I had a pronounced whistling sound. It turned out to be the gasket between the the TB and the manifold. Part of the gasket was protruded into the neck of the intake. I cut the gasket down flush and no more whistling. I don't know anything about the FAST but perhaps you have a sharp edge somewhere.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
Mine whistles too---If you call or E-mail FAST--they will send you a write up on the fix for the whistle---They attribute it to the sharp edges in the T-Body opening--It is an easy fix --Most all of them whistle so don't feel like it is a problem--It kinda sounds cool anyway--I eventually fixed mine according to their instructions--and it quit-----
PS i have a copy of the "whistle fix mod" from FAST--If you send me your E-mail --i will forward it
PS i have a copy of the "whistle fix mod" from FAST--If you send me your E-mail --i will forward it
Last edited by tblu92; Apr 4, 2008 at 01:15 AM.
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Melting Slicks
Joined: Nov 2007
Posts: 2,197
Likes: 2
From: Niagara Falls NY
St. Jude Donor '08-'09
Maybe the motor is just happy with the new intake
Do anybody know if its normal for my C5 to whistle after install a fast manifold intake. I did buy knew gasket and car idles fine. Car did pick up a couple tenths at track but whistle when r.p.m.'s goes up. I checked for leaks with carb cleaner all checked out good.
