Supercharged
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Name : Blake
Age : 34
Location : Akron, Ohio
Joined : 2008-03-12
Post Count : 611
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 | | Subject: Belt slip & screech noise Wed Jul 02, 2008 12:22 pm | |
| i was getting on it and when 1st gear was right about to shift and i let out of it as fast as i could  yeah it was the belt trying to catch up with the pulleys im guessing it makes a horrible loud screech, never knew about that one  | |
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AA
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Name : Aaron
Age : 47
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18452
Merit : 252
| | Subject: Re: Belt slip & screech noise Wed Jul 02, 2008 1:24 pm | |
| Somewhat normal. You can replace the belts if worn, or install a 3.5" SC tensioner pulley to tighten things up. _________________ '05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch^^^ SOLD ^^^  '70 Ninety-Eight Holiday Coupe 455cid • 116k miles^^^ SOLD ^^^ | |
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Supercharged
Addict
Name : Blake
Age : 34
Location : Akron, Ohio
Joined : 2008-03-12
Post Count : 611
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| | Subject: Re: Belt slip & screech noise Wed Jul 02, 2008 4:05 pm | |
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BillBoost37
Junkie
Location : Enfield CT
Joined : 2007-11-28
Post Count : 769
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| | Subject: Re: Belt slip & screech noise Thu Jul 03, 2008 8:38 am | |
| A stretched or worn belt will frequently result in belt slip.
I think that's what Aaron was getting at. | |
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AA
Administrator
Name : Aaron
Age : 47
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18452
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| | Subject: Re: Belt slip & screech noise Thu Jul 03, 2008 9:23 am | |
| I meant it's part of the physics behind a blower spinning 20k RPM and then being asked to stop instantly.
As long as I've had my car, when I floor it in 1st, then let off sharply at 5k RPM, it's going to slip a little, making a chirp. This gets even worse when belts are bad, but can happen even with fresh ones. Smaller SC pulleys also encourage this phenomenon.
When you're driving the car in an erratic fashion, some slip is "normal", imo. I wouldn't describe the noise as horrible, though. It's just a noise.
To Bill's point, since your engine has a stock SC pulley, the noise is probably the result of worn/stretched belts, but the reason for it happening is not surprising. _________________ '05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch^^^ SOLD ^^^ '70 Ninety-Eight Holiday Coupe 455cid • 116k miles^^^ SOLD ^^^ | |
|
Supercharged
Addict
Name : Blake
Age : 34
Location : Akron, Ohio
Joined : 2008-03-12
Post Count : 611
Merit : 0
| | Subject: Re: Belt slip & screech noise Thu Jul 03, 2008 1:11 pm | |
| okay, i see what your getting at | |
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