update 1991 C4
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Heel & Toe
Joined: Jan 2002
Posts: 23
Likes: 21
From: Pembroke Pines FL
update 1991 C4
Hi guys, car progressing nicely. Weatherstripping....A/C fixed....bringing paint back, headlight gears finished...put in the air foil today ( a bit of a difference) etc...lots of fun...
Ordered a new serpentine belt and will put on this weekend.
There is a round heavy disk that sits in front of the engine. about 10 inches around. I had come across in the forum where people had removed it because it was useless and they gained HP? Don't even know how to do a search for that lol but it looks like it just bolts off. I figured if I'm already there putting on the new serpentine belt, might as well take this thing off too?
Any thoughts?...What the heck is that thing for anyway?
Ordered a new serpentine belt and will put on this weekend.
There is a round heavy disk that sits in front of the engine. about 10 inches around. I had come across in the forum where people had removed it because it was useless and they gained HP? Don't even know how to do a search for that lol but it looks like it just bolts off. I figured if I'm already there putting on the new serpentine belt, might as well take this thing off too?
Any thoughts?...What the heck is that thing for anyway?
Race Director
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From: Compound in the Grove, Ga.
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I think most refer to it as a Frisbee. Sounds like you coming along nicely. Lets see some pics.
Link
Link
Last edited by FASTAZU; Nov 10, 2020 at 06:37 PM.
Melting Slicks
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Never really saw the point in ditching the frisbee, other than maybe seeing more of the front of the motor.
What it's for is to reduce the shock when the AC clutch engages.
What it's for is to reduce the shock when the AC clutch engages.
Melting Slicks
Joined: May 2019
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From: Mid-Atlantic
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If you do take it off, which is effectively pointless, but if you do, then use washers on the bolts in order to accommodate the thickness of the frisbee.
Melting Slicks
Joined: May 2019
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The question has also been brought up as to whether or not the water pump bearings would go sooner. Dunno if anyone has ever tested that theory or not, though.
Safety Car
Joined: Apr 2016
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From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
Today, at Corvettes at Carlisle, Gordon Kilabrew was giving a Q & A session at the 35th Registry tent. I asked him why the "frisbee" had been added to the front of the 1988 L98 water pump pulley.
He said that it was installed to dampen out vibrations when the AC cycled on/off. He further said that it was later found that it caused the belt to chirp and so eventually GM omitted this element from the water pump pulley.
He then said that we could just take it off and all would be fine.
He said that it was installed to dampen out vibrations when the AC cycled on/off. He further said that it was later found that it caused the belt to chirp and so eventually GM omitted this element from the water pump pulley.
He then said that we could just take it off and all would be fine.
https://www.corvettemuseum.org/gordon-killebrew/
Team Owner
Joined: Oct 2004
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From: altered state
St. Jude Donor '05
Usually rotational engine parts dont matter far as that goes.
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Drifting
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I do believe that Gordon Killebrew should be quite believable. Taking it off won't hurt anything.
https://www.corvettemuseum.org/gordon-killebrew/
https://www.corvettemuseum.org/gordon-killebrew/
Chris
Melting Slicks
Joined: Aug 2018
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I do believe that Gordon Killebrew should be quite believable. Taking it off won't hurt anything.
https://www.corvettemuseum.org/gordon-killebrew/
https://www.corvettemuseum.org/gordon-killebrew/
Race Director
Joined: Feb 2002
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From: Compound in the Grove, Ga.
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