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Thread: HELP-Soft 60' Times

  1. #1

    HELP-Soft 60' Times

    I have made some new PB's and the car now runs 10.20@132 pretty consistent. IM happy with that but i still think the 60' times are off. Had a best 60 of 1.47. With a 5.00 gear and a glide at a 4800 launch i think it should be lower. RPM thru the traps was 7200. I called a couple of converter guys and the consesus was that the 60' times indicate the converter is tight but the rpm at the big end indicates the converter is loose. The only good info they could use was the mph as an indication of horsepower. The converter is only a 9" though. Would I see a good increase in 60' and ET if i were to buy a 8" custom race converter? Does any of this information make sense? Seen it before? Reccomendations?

    Thanks,

    Nick

  2. #2

    Re: HELP-Soft 60' Times

    Quote Originally Posted by npauline442
    I have made some new PB's and the car now runs 10.20@132 pretty consistent. IM happy with that but i still think the 60' times are off. Had a best 60 of 1.47. With a 5.00 gear and a glide at a 4800 launch i think it should be lower. RPM thru the traps was 7200. I called a couple of converter guys and the consesus was that the 60' times indicate the converter is tight but the rpm at the big end indicates the converter is loose. The only good info they could use was the mph as an indication of horsepower. The converter is only a 9" though. Would I see a good increase in 60' and ET if i were to buy a 8" custom race converter? Does any of this information make sense? Seen it before? Reccomendations?

    Thanks,

    Nick
    IMO 8 inch race converter(really need cam specs),Transbrake leaving at 4800 with a brake stall of 5500.Might be even able to drop the gear alittle to a 4.something with still a high 9 sec. e.t..I'd look for (given everythings right) mid 1.30's to high 30's.Still alot of variables though.

    Does the converter you have now max stall around 4800 to 5k?If so ,try leaving alittle lower on the rpm to flash the verter more.

  3. #3
    Senior Member MASTER BUILDER
    Join Date
    Apr 2009
    Location
    B.C. Canada
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    145
    What size tire?

  4. #4
    tire size is 33"

    cam is a .740/.710 solid roller, 280 or so duration(dont hold me to it)

    If i pull the chip i can thru uo the brake to about 5500.

  5. #5
    Senior Member RACING JUNKIE
    Join Date
    Jan 2006
    Location
    La.
    Posts
    2,890
    X2 hit the converter a little harder, maybe around 4200, you could pick up a couple hundreds by doing this. You didn't say how much the car weighs, but last sat. with a 388" 2950lb car leaving at 3600 on the chip 5500 stall converter, we went 1.442 and there's alittle left in it, track wasn't preped very good.

    JMO

    Zip.

  6. #6
    Senior Member SENIOR BUILDER
    Join Date
    Feb 2005
    Location
    LAWTON MI
    Posts
    113
    I two step mine at 3400rpm 9 converter (5000 on brake)
    4.00 rear gear 29 tire 7500rpm at top end
    Avg 60 = 1.48 best =1.44
    Avg ET = 10.21 best = 10.09
    Avg MPH = 132 best = 135.5

    With a 5.00 gear you should have a better 60
    Is it spinning?


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