Thread: Belt Wrap System write-up (pics)

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  1. #1 Belt Wrap System write-up (pics) 
    GTP Level Member OrangeL67's Avatar
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    We've all heard of belt slip, and we all know what it is. The problem is, if we don't know how to identify it, we probably won't know if we are being robbed of power by it. Before I go into detail, let me first say that a belt wrap system is on the same level as my cam/e85/& Intercooler in terms of providing power to the wheels.

    Out of sight, out of mind. That is until you are pushing for a performance goal and can't seem to translate your mods into a desired 1/4 mile or trap speed. Remember, you don't have to have a 2.55 pulley to see belt slip. My 3.3 and 3.1" setup both had some belt slip. Minimal as it may have been, the signs were still present. The effects just were not enough at that point to concern me.

    The first and most accurate thing you can do to ID belt slip is get yourself a boost gauge. On a 2.8" pulley, my boost would rise to 11.2-11.6 psi at 5000 RPM at WOT. Above 5k, it would drop quickly back into the mid-high 9psi range and would not climb far above 10psi thereafter.

    Another very important thing to look for is rubber dust. This is black oily looking dust that accumulates around everything that is near the supercharger pulley. This dust is rubber from your belt slipping, just as you will get rubber all over your fenders when you do a burnout.

    Notice the dust on the coolant bottle and the fuse box cover






    And for those of you with hard-core setups (2.8 pulley and smaller) You may actually hear a screeching rubber burning sound at high rpm's. In a minor slip situation, you may hear a small chirp during shifts at WOT. In a more severe situation, you will hear the belt doing a burnout under your hood from 5000 RPM to Red line! you can even smoke the belt.

    HOW TO FIX THE PROBLEM...

    Smaller belts and oversize tension pulleys can help, but they can only do so much. Think about this; You want to twist a bottle cap off. You are strong enough, but cannot get a good grip on the cap. so you wrap your elbow around a light pole to get leverage on the bottle cap. This could help, but it's silly and it probably won't spin the cap anyway. You need to get a better hold on the cap itself. Better leverage increases your strength, but it's useless if you are already strong enough to twist the cap. The more effective way to open the bottle is to find a better way to grip the cap. When the belt is the correct size, and your stock tensioner is working fine, you need to address the core of the problem: GRIP.

    This is where the Belt wrap system comes into play. This helps the belt contact 2/3rds of the pulley surface as apposed to a little over half.

    Notice how the belt completely covers the front wall of the pulley in the picture using a W-Body Store Belt wrap system and compare it to the previous pictures



    Installing this system not only stopped my boost from dropping after 5k RPM's, It also allowed me to GAIN 1.6 PSI from 5k to shift point maxing out at 12.5 pounds on a 2.8 pulley ( & 13.7 on a 2.6). This is a gain of roughly 3 &1/2 pounds of boost from 5k to redline on a 2.8! You can probably imagine the contrast of top end power with the belt wrap installed. Probably my best mod for the money spent. Just something to think about if you have a small pulley M90 build.

    VS cam build 13.01@107 316whp/ XP build #1 12.78@110 334whp/ XP build #2 12.56@113 347whp
    IS3 Cam build (Ready to put out some serious numbers)
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  2. #2 Re: Belt Wrap System write-up (pics) 
    GT Level Member RegalGS98s's Avatar
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    Nice write-up. What size is that pulley though? Hope it has better bearings than the smooth 3" pulley that's supposed to be run on the supercharger belt line. In about 50k miles I had to replace it 3 times. Once I switched to a 3.5" pulley, I didn't have the issue again and the pulley still has hardly any play. I also had the increased tensioner effect as you said. For whatever reason the 3" groove pulley didn't have any problems. I figure because it has a more constant load than the 2 smooth pulleys that are on the tensioner side of the belt wrap.
    SMGPFC #0330 - 3.25, Intercooled, Custom Tune, 1.84rr, LS6 Springs, roller timing chain, SLP Headers, Borla Exhaust, built Trans, B&M Trans Cooler, home cut poly uppers, gapless rings, N* TB, Ported heads.
    Soontocome: CAM?, Custom modified M112, home poured Poly Engine and Trans mounts
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  3. #3 Re: Belt Wrap System write-up (pics) 
    I live here. TLSheff's Avatar
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    Nice Write-Up!!!

    W Body Store
    ^ Is available for both GenIII and GenV

    Smoothflow Pulleys
    ^ Has an alternative for the GenV specifically (could be modded for a GenIII)

    Just giving options on design, they do the same thing

    Quote Originally Posted by AmericanSoldier View Post
    ...not scanning/monitoring your motor is like bangin a hooker and you just HOPE your not infected.
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  4. #4 Re: Belt Wrap System write-up (pics) 
    GTP Level Member Dee23's Avatar
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    Old thread but a thread is a thread. But anyway I was just thinking about this very same topic rather i should get the oversized tensioner pulley or the pulley wrap kit.

    Hmmmmm, which is more effective?
    Not your average grocery getter, but theres always at least two things on the list.... 10w-30 Castrol Titanium and Shell 91 premium mixed with a lil 100 octane racing gas......
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  5. #5 Re: Belt Wrap System write-up (pics) 
    GrandPrix Junkie CrazyGuy03's Avatar
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    The one that puts more contact on the SC pulley ex belt wrap or 2 extra ribs
    2003 Buick Regal GSX lots of mods - click here to see latest build - http://www.grandprixforums.net/threa...ld-for-the-gsx

    *For Reference - Does not have a Zack Howard Cam - It's an Intense Stage 3 - Thank You*
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  6. #6 Re: Belt Wrap System write-up (pics) 
    GTP Level Member Dee23's Avatar
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    I was thinking belt wrap too.

    Now Wbody or Smoothflow belt wrap?
    Not your average grocery getter, but theres always at least two things on the list.... 10w-30 Castrol Titanium and Shell 91 premium mixed with a lil 100 octane racing gas......
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  7. #7 Re: Belt Wrap System write-up (pics) 
    GXP Level Member GTPpower's Avatar
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    Steven Chesser sells them as well.


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  8. #8 Re: Belt Wrap System write-up (pics) 
    GrandPrix Junkie CrazyGuy03's Avatar
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    Who is that ? Link for contact info ?

    I have a PRJ style one. Someone recently uploaded the CAD file and began making them again
    wonder if thst is the same person ?


    only reason I am not running my belt wrap with my 8 rib is because the IC lines are routed in such a way that the bar won't fit
    2003 Buick Regal GSX lots of mods - click here to see latest build - http://www.grandprixforums.net/threa...ld-for-the-gsx

    *For Reference - Does not have a Zack Howard Cam - It's an Intense Stage 3 - Thank You*
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  9. #9 Re: Belt Wrap System write-up (pics) 
    Killa Bee Scottydoggs's Avatar
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    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  10. #10 Re: Belt Wrap System write-up (pics) 
    GXP Level Member GTPpower's Avatar
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    ^^that


    2001 GTP Drag Car - XPZ, Tischler heads, Upsidedown M90 IC'd, e85, Gen V, 2.3 w/ 5%OD
    2005 F350 6.0 - studded, deleted, tuned
    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
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  11. #11 Re: Belt Wrap System write-up (pics) 
    The Blue One blueguy's Avatar
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    Good lord old thread
    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
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  12. #12 Re: Belt Wrap System write-up (pics) 
    Donating User Swiggles's Avatar
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    Could also do a bonneville engine bracket and icm bracket, gives you more wrap, harder to find these days.
    No more GP 04 Impala SS Indy:
    Gen V 3.4”|FWI|N* TB lq4 MAF|1.9 Modded Rockers|F&R Plogs|ZZP 3" Catted DP|ZZP 2.5" Catback|
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