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Forced Induction - 5.0L V8 Engine Discussion of superchargers, turbo, nitrous and related for the 5.0L V8 engine.


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Old 06-02-2017, 09:04 AM   #541
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Originally Posted by SAL08HO View Post
Hello Guys I just got my car back from a Whipple Install and after driving around I get a very loud chirp or squeal when I let off the Throttle at high rpm in the lower gears ... Also the Supercharger seems to make rattling sound when idleing that sounds like little pebbles going around , Whipple requested a video but says it's normal and so does my mechanic!! Any help or feedback please ? Thanks
Likely you tensioner lost its ability to control the belt on decel. The belt and tensioner go through a very dramatic swing when under full song and shift or decel. When you accelerate hard a long pulls the belt stretches and the tensioner continues to go down taking up that slack, when you let off it swings back up to again take up slack since the belt now isn't under load. At the same time the tensioner is trying to take up that slack the Superchargers inertia is still spinning faster than the belt system that has slowed down so you end up with a chirp or squeal if the tensioner is not controlling the belt. The tensioner should be adjusted to its arm is near horizontal with the ground.

As far as the noise goes, all Whipple's make a little gear chatter when idling, and that's likely what your hearing now.
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Old 06-02-2017, 09:25 AM   #542
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Just find out if you have the current version tensioner and pulley bracket stands and if not the upgraded ones will take care of the chirp. The other sound is normal.
How do I find out ? I would hope I do since it's a new kit ... maybe 3-4 months old but new in the box... squeal is really loud when coming off the trottle at high rpm !
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Old 06-02-2017, 10:35 AM   #543
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First look at the tensioner and see it it's black billet aluminum with a white Whipple logo on it and if so it's the new one. If it's unpainted cast aluminum it's the old one. If you have the old one you probably have the old bracket stands as well.
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Old 06-02-2017, 12:25 PM   #544
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Post pics please. First, find the sight glass on the passenger side towards rear of the SC. It is round glass window. Make sure it shows half full w clear oil.
Who did install?
Pics from under hood w flash or use bright flashlight so we can see the tensioner.
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Old 06-02-2017, 12:49 PM   #545
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Quote:
Originally Posted by Roh92cp View Post
Likely you tensioner lost its ability to control the belt on decel. The belt and tensioner go through a very dramatic swing when under full song and shift or decel. When you accelerate hard a long pulls the belt stretches and the tensioner continues to go down taking up that slack, when you let off it swings back up to again take up slack since the belt now isn't under load. At the same time the tensioner is trying to take up that slack the Superchargers inertia is still spinning faster than the belt system that has slowed down so you end up with a chirp or squeal if the tensioner is not controlling the belt. The tensioner should be adjusted to its arm is near horizontal with the ground.

As far as the noise goes, all Whipple's make a little gear chatter when idling, and that's likely what your hearing now.
.

So most likely a tensioner adjustment will cure the problem? Thanks
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Old 06-02-2017, 12:49 PM   #546
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Originally Posted by Jmeo View Post
First look at the tensioner and see it it's black billet aluminum with a white Whipple logo on it and if so it's the new one. If it's unpainted cast aluminum it's the old one. If you have the old one you probably have the old bracket stands as well.
I will look into it but I'm pretty sure it's the latest version !
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Old 06-02-2017, 12:52 PM   #547
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Post pics please. First, find the sight glass on the passenger side towards rear of the SC. It is round glass window. Make sure it shows half full w clear oil.
Who did install?
Pics from under hood w flash or use bright flashlight so we can see the tensioner.
Yes it does show half fuel and the shop installed over 100 Whipple kits so I know it's not an install error ... I was just concerned but if Whipple also replied normal than it's normal lol
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