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Thread: 1/8 mile ET guess?

  1. #1
    Senior Member SENIOR BUILDER
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    1/8 mile ET guess?

    1/8 mile ET GUESS just finished my race car (40 willys roadster) weights 2400# with me in it (200#) 109" w/b, 4:56 gears, 32.5x16.5x15 hoosiers, 1:76 P/G, motor is a donovon sbc 4.155 bore but had been decked 180,000!, afr 227 heads by darrel white port matched brodix intake, 1050 dominator, 13.9 to 1, erson roller 712 intake 675 exhaust, 278 intake & 282 exhaust @.050, 6" rods, crank is 3.6250 stroke makes 393", 2" headers, 5k stall converter new, ran sunday at about 3000', was disappointed with et?

  2. #2
    Senior Member RACING JUNKIE
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    5.4-5's Id think CI is hurting it, converter is to tight IMO also Will need to shift it very high rpm to make it work.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
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  3. #3
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    David i thought it would run at least in the low 6's, but 2 runs on sunday it ran 6.687 and 6.688 @ 103.69 & 103.93! i thought in the 1/4 a low 9 but this is not going to happen i'll be lucky with a low 10. i'am going to look at the bottom end to make sure it is not hurt. thanks for your input Doug

  4. #4
    Senior Member RACING JUNKIE
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    At that weight your hopes should of been met IMO Sounds like a very good setup, did you happen to see what the rpms were doing or have a playback and know what flash stall and fall back rpm was.

    Hopefully its something simple because it sounds like good stuff. I used to have a 383sbc that wasnt as good as your stuff listed, ran 6.0's @ 2700lbs so I'd think yours should run that for sure.
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  5. #5
    Senior Member RACING JUNKIE
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    Does that engine need a 1050 dominator at 393 ci? Where do you shift it at?

  6. #6
    Senior Member RACING JUNKIE mopar1968's Avatar
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    5.8-6.0


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  7. #7
    Senior Member RACING JUNKIE
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    Re: 1/8 mile ET guess?

    Quote Originally Posted by bowler
    1/8 mile ET GUESS just finished my race car (40 willys roadster) weights 2400# with me in it (200#) 109" w/b, 4:56 gears, 32.5x16.5x15 hoosiers, 1:76 P/G, motor is a donovon sbc 4.155 bore but had been decked 180,000!, afr 227 heads by darrel white port matched brodix intake, 1050 dominator, 13.9 to 1, erson roller 712 intake 675 exhaust, 278 intake & 282 exhaust @.050, 6" rods, crank is 3.6250 stroke makes 393", 2" headers, 5k stall converter new, ran sunday at about 3000', was disappointed with et?
    Bowler, my friend, how you doing, i still haven't used the Zoomies i bought from you a couple yrs. ago. i would really like to see the willy's roadster. The Anglia that i bought the headers for is on the back burner for now.

    Zip.

  8. #8
    Senior Member SENIOR BUILDER
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    Willys Roadster

    to all i can tell a funny story about the car, saturday i ran 3 time trials running 7.5 felt like it was missing! i went ahead and raced went 6 rounds and won PRO! went home and brought my instruction manual on my accel 300 ing. checked the rev limiter and it was set at 7500 rpm's, so i turned it off sunday and it runs 6.68 and now i could not cut a light! not what i was looking for but better! the plugs look good, i run 110 race gas, to be honest not sure of the rpm's. i would guess about 7000, one other question on ebay a dealer is selling bowtie blocks both 350 & 400 i was wondering how they compare to dart shp? because of the deck my engine builder used 434 je pistons i'am thinking at the end race season going to a 434 thanks to all Doug

  9. #9
    Senior Member DYNO OPERATOR
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    My guess you ought to be in the low 6's. JMO

    TS1955

  10. #10
    Senior Member MASTER BUILDER
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    I would guess that you should be running about 5.90's, as I built a 388 for a guy several years ago for a 2350lb car that had similar cam, heads, intake, and a 1050 dominator. It ran 9.20's in the quarter with a 4.88 gear and 32x14x15 and a 5500 stall.

    Looking at the rear gear, tire size, and being in high gear, it shows that you should only be up to around 5000rpms to run 103mph. Something doesn't seem right with your ignition box, or you have lots of slippage in your transmission or even maybe the transmission is a reverse pattern shift and you are taking out in high gear and then shifting to low(I did this one on a T400). For you to run 7.50's with the RPM limit set to 7500 with a possible miss, and then run 6.60's with the rev limit turned off either means slippage or an ignition problem.

    My car has a big block, but it only goes through at 6150 rpms and that is with 4.56 gears, 33x16x15, and a powerglide that I shift at 7400 and it runs 5.60's at 120mph.

    Bill Mitchell


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