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Thread: belt slip?

  1. #1
    Junior SCH Member
    Join Date
    Apr 2005
    Posts
    47

    belt slip?

    Hello everyone. I just had my brothers 96 Cobra dyno'd, Vortech T trim with stock 6 rib belt setup with a RR 3.2 pulley. It made 529rwhp @6800rpm....on 93 octane....tuner wanted to pull timing out cause of sketchy ethanol pump gas these days...with 16 degrees it came to 493rwhp/405rwtq with about 13psi. The belt shows no sign of wear, no belt dust and the Motec data acquisition doesn't show any obvious signs of slippage. My problem is that the boost builds real slow. Is it posssible for the belt to be slipping(especially low rpm)even though there are no obvious signs? I'm ready to go 8 rib but do'nt want to be wasting my time. Thanks in advance.
    1993 LX Hatchback
    408, Canfield Heads, Trick Flow Intake, Ys trim, Gen 7, PA-Super Leaker C-4,3.27 diff, 83lbs inj,kooks 2" into 3.5 collectors, Dr. gas 3" X pipe,Bassani 3" cat back,Second Street Speed Twin in-tank Bosch,Solid roller cam,Jesel Shaft mount rockers,VP C-16,Mallory HyFire667c

    10 # 10 rib TKO=625 rwhp
    17 # COG C-4=650 rwhp
    NEW SETUP(porting and valvetrain mods)
    18 # COG C-4=725 rwhp
    ...about my horsepower curve...well there isn't any curve....kinda straight up...then straight across...hahaha
    1 gallon VP C-16 $8.50
    1 supercharger COG belt $110
    Smoking the tires from a 100mph roll $PRICELESS

  2. #2
    SCH Moderator BLOWNBY's Avatar
    Join Date
    Mar 2004
    Posts
    1,380
    13 psi is a lot for a 6 rib setup. I would imagine you'd see alitlle improvement w/ 8 rib. Plus you will probably see consistent psi.

    However, the 3.2 RR pulley is a good pulley to prevent slip. If your not seeing really any dust and don't plan on more boost then stick w/ what you have.

    If you see inconsistent 13 psi readings later upgrade.
    351 "stockshort block": -Vortech T-trim (21 psi), Trick Flow Heads, Lunati Cam, Weldon fuel system, Lentech AOD., 3.55 gears, 27" Hoosier QTP's, 3500# with me

    -545 rwhp
    -10.02 @ 135mph---Is 9.99 to much to ask?:freaks:
    -1.42-- 60'
    Quote Originally Posted by regattacoupe
    Since when do they let Homo's with 700rwhp that run 11's be a SCH mod? :shocked: :obscene: :D

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