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Thread: Help with 60' time

  1. #1
    Member JUNIOR BUILDER
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    Help with 60' time

    I need the help of the panel for my next step.

    Here is the video from yesterday:

    http://img193.imageshack.us/i/60foot21aug090001.mp4/

    '66 Chevy II Street/Strip car
    355 SBC 671 ~630 HP and 600TQ
    TH400 w/trans brake 10" converter locks at 3500 rpm on brake
    Ford 9" spool and 4.30 gear
    4 Link IC 49.5" and 7"
    Tires 31x18 Hoosier DOT Quick Time Pro's

    The rear shocks are 8 years old and non adjustable (saving money for new)

    I have run the air pressure from 6.5 to 12 psi
    Launch rpm from 2500 to 3200

    My 60' times are no better than 1.66 and have been as bad as 1.81. I think I should be in the 1.5 60' range. 1/4 mile times are 11.3 to 11.5. I would like to see a high 10.

    Can you tell from the video which way I should go next?

  2. #2
    Senior Member DYNO OPERATOR
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    5000+ rpm converter.

    who said your making 650 hp?

    what cam shaft?
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  3. #3
    Member JUNIOR BUILDER
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    Engine dyno when built showed 630 HP @ 6000 and 618 TQ @ 4848 rpm at the flywheel.

    Lunati hyd blower cam. Don't have the exact specs here right now.

    I wondered how much was the compromise between a tighter street converter and all out track converter.

  4. #4
    Senior Member DYNO OPERATOR
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    converter going to get it moving

    what dose it wheigh?

    what ET & MPH?

    with that kind of power that little car should be moving with the wheels in the air.
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  5. #5
    Senior Member DYNO OPERATOR
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    To put it in perspctive,My 3000# 360cid sbc ran 11.80 with a 3000 rpm stall at 115 mph.

    put the 5000 rpm stall in and went 10.80 at 120 mph liften the wheels about 4 inches.

    never ran the motor on a dyno ,but I'm geussing around 475 to 500 hp

  6. #6
    Member JUNIOR BUILDER
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    Car weighs 3360 with me in it.

    ET's have been 11.27 best to 11.47.

    MPH 119 to 121

    thru the traps 5800 to 6000 rpm

    Thanks for the help, Steve

  7. #7
    Senior Member DYNO OPERATOR
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    Quote Originally Posted by montecarlo84
    To put it in perspctive,My 3000# 360cid sbc ran 11.80 with a 3000 rpm stall at 115 mph.

    put the 5000 rpm stall in and went 10.80 at 120 mph liften the wheels about 4 inches.

    never ran the motor on a dyno ,but I'm geussing around 475 to 500 hp

    your mph is showing the power.

    you will need all those specs to get the right converter
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  8. #8
    Nothing like a 8 inch converter!!! That thing will come to life! Be careful, it may show up other things it needs when it takes that kind of hit. Like preload to keep it going straight when the wheels are in the air!

  9. #9
    Member JUNIOR BUILDER
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    I have a 9" converter coming. JW Performance is building it and should be between 4800 and 5000 stall. I hope I didn't cut myself short be not getting an 8".

    Will post results next week if the rain will cooperate.

  10. #10
    Senior Member RACING JUNKIE
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    I think your 9 inch is still too big. The right set up for your car is going to be found in an 8 inch converter. I have a 9 inch in a 1000HP 582. I would call and talk to some other companies myself but an 8 inch with 5000-5500 stall is going to wake the dead in that car.


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