Thread: Pulley size

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  1. #1 Pulley size 
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    Ok, I got my Grand Prix allready modded and here is my question. It has the Thrasher modular pulley system and I want to know how to figure out what size pulley is on my s/c. Thanks for any help.
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  2. #2 Re: Pulley size 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    It should say on the face of the pulley.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  3. #3 Re: Pulley size 
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    Yea,thats what I thought. Theres a white worn off sticker with nothing on it.
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  4. #4 Re: Pulley size 
    The Blue One blueguy's Avatar
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    Measure it.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
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  5. #5 Re: Pulley size 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    What blue said!

    You can use a tape measure and just measure the outside straight across.
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  6. #6 Re: Pulley size 
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    I tryed with a tape and it didn't seem like a very accurate measure because of the center bolt.
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  7. #7 Re: Pulley size 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Maybe try a ruler then?
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  8. #8 Re: Pulley size 
    The mod from over yonder TheOtherNick's Avatar
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    Buy a caliper they are handy to have.
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
    SMGPFC Two Nipple General
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  9. #9 Re: Pulley size 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    Or.... unscrew the pulley from the hub and use the tape again...
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
    Projects: 86 Monte Carlo SS / 98 Sonoma / 74 Honda CB750
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  10. #10 Re: Pulley size 
    The Blue One blueguy's Avatar
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    ...soooo...that^

    OR, double the radius since the screw gets in the way?

    lulz.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  11. #11 Re: Pulley size 
    The mod from over yonder TheOtherNick's Avatar
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    dont forget teh pie.
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
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  12. #12 Re: Pulley size 
    The Blue One blueguy's Avatar
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    Circumference ?

    oh man...love this thread already.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  13. #13 Re: Pulley size 
    The mod from over yonder TheOtherNick's Avatar
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    Im drunk and thinking of pie.
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
    SMGPFC Two Nipple General
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  14. #14 Re: Pulley size 
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    Thanks guys. Now I feel real s.m.art.
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  15. #15 Re: Pulley size 
    The Blue One blueguy's Avatar
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    I just hope it has more than the pulley on it...


















    inb4smallpulleyandnomodsandblownmotor?
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  16. #16 Re: Pulley size 
    The mod from over yonder TheOtherNick's Avatar
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    I am going to guess its a 3.25
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
    SMGPFC Two Nipple General
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  17. #17 Re: Pulley size 
    The Blue One blueguy's Avatar
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    2.047"

    With some sweet tribal carvings.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  18. #18 Re: Pulley size 
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    Yea. Headers,exaust, t-stat,open cone intake
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  19. #19 Re: Pulley size 
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    Other then that,not sure
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  20. #20 Re: Pulley size 
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    Quote Originally Posted by michaeljus View Post
    s.m.art.
    OCD kicking into overdrive.
    - Ed - 2000 Grand Poverty Daytona edition. Rough idle. Funny whistle. Steering issues at WOT. 3.8 SC pulley.
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