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Thread: Building a car for 1/8 mile drag racing

  1. #1
    Member MASTER JOURNEYMAN
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    Aug 2007
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    Building a car for 1/8 mile drag racing

    I'm looking at a ealry 70's Nova roller to build up for my son's first drag car. It's a really basic ride which makes it perfect for some one just starting out. I grew up running quarter mile tracks and we have been hitting some of the 1/8 mile tracks in our area just to keep the excitement level at a fever pitch. The closest quarter mile track is a bout 75 miles away and I have two 1/8 mile tracks about 30 to 35 miles away so we will be running 1/8 mile. I'm just not all that familure with what horsepower numbers translate into on the 1/8 mile, but if you take me to a 1/4 mile track I can usually come pretty close to guessing the time if I know what the HP numbers are, car, trans, the usual stuff. The car we are looking at has the interior removed, a 10 point cage, a 9 inch ford rear with leafs and slapper bars and probably guessing, 10.5 slicks around 28 to 29 inches in height. I think it's all steel except the hood. I am looking at a Scott Schaferoff 402 in/ 465hp SB engine for this car and a glide combo with the optium torque converter and rear gears for this set up. What kind of numbers (time and speed) should she put out on the 1/8? We are about 450 to 550 above seal level.

  2. #2
    Administrator RACING JUNKIE bjuice's Avatar
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    I got a 69 camaro with a 460hp 406ci SBC...Un-cut car..26x10's ET Streets
    turbo 350..456 gear,,foot braking thru the mufflers and it will run 7.50's at 89/90 mph

    i would say with a Glide,transbrake, and drop the mufflers put some 28x10 Slicks.i would say maybe some low 7.20's...possible high teens

    i have run the qtr mile a few times and i really liked it...different ball game on the big end.

    Only bad thing with the 1/8 is when you really want to start laying down some numbers,,you really have to hit it hard and run some low 60ft times or you can forgot a fast 1/8 mile et.

    tougher then one thinks to break into the Mid to lower 1.20 60 ft time...in a uncut, stock suspension ,heavy , small tire car
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  3. #3
    Senior Member MASTER BUILDER
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    1/8

    I built a 360 ci flat top trw , flat tappet cam 258-266 .570 lift, steel darts 2.02-1.60 valves 1.82 PG tbrake 29 tire 84-85 camaro has run 7.18, 8" conv mabe 5.14 gear. very trouble free but this cam is 30 years old. I would build a roller today with the problems we are having with flat tappet cams. Later J.Smith 4621 racing The SledgeHammer. bjuice the zipper has seen this car run.

  4. #4
    Senior Member DYNO OPERATOR
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    Mine and my wifes cars take alomst exactly 4 more seconds to make the second 1/8 mile. WE are both running 6.7-6.8 1/8 mile times. I think 1/4 mile is a waste, there is 4 seconds wasted to the day and 4 more seconds you can pop the top of a cold one,lol.

  5. #5
    Senior Member RACING JUNKIE
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    Those that can't run 1/4 mile seem to love 1/8 mile. Someday we'll be racing 60ft. LOL

  6. #6
    Administrator RACING JUNKIE bjuice's Avatar
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    Re: 1/8

    Quote Originally Posted by JimmySmith
    I built a 360 ci flat top trw , flat tappet cam 258-266 .570 lift, steel darts 2.02-1.60 valves 1.82 PG tbrake 29 tire 84-85 camaro has run 7.18, 8" conv mabe 5.14 gear. very trouble free but this cam is 30 years old. I would build a roller today with the problems we are having with flat tappet cams. Later J.Smith 4621 racing The SledgeHammer. bjuice the zipper has seen this car run.
    Question for you Jimmy ?...1st off Great ET....but i am betting you coming in a little lighter then the 69 camaro i have...

    My car weighs whatever a stock 69 camaro weighs from the factory, plus a 10 point cage,subframe connectors and slapper bars.....and i am 230lbs :shock:

    so i am guessing i might be maybe....what ?? 3300/3400 lbs with driver ?

    i would think our Gearing would be close due to the tire height difference.

    oh yes i am running a flat tappet in this car also..i am very seriously thinking about running this car in a few ORSCA races this year...the 7.00 class.

    gonna pick it up a little...got a 144 bm blower...also gonna look at changing to a roller, slicks, ,and a break...this should get me close enough to the index without having to be perfect every pass.. :roll:

    http://www.outlawracing.com/
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  7. #7
    Senior Member RACING JUNKIE BEAST477's Avatar
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    Quote Originally Posted by dparker
    Those that can't run 1/4 mile seem to love 1/8 mile. Someday we'll be racing 60ft. LOL
    Love the humor parker. Any luck moving the truck?
    BEAST477






    Only a rich man can afford to use cheap parts.

    http://www.racingjunk.com/profile/177549

  8. #8
    Administrator RACING JUNKIE bjuice's Avatar
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    Quote Originally Posted by dparker
    Those that can't run 1/4 mile seem to love 1/8 mile. Someday we'll be racing 60ft. LOL
    parker just curious..what is your 1/4 et .....60ft and 330ft ?..not trying to be trivial just curious thats all.
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  9. #9
    Senior Member RACING JUNKIE
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    Quote Originally Posted by dparker
    Those that can't run 1/4 mile seem to love 1/8 mile. Someday we'll be racing 60ft. LOL
    The Ed Bigley 60ft Nationals!!!

  10. #10
    Senior Member MASTER BUILDER
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    bjuice, I don'tknow what his car weighs but ths motor ran 6.85in my sons 67 camaro @2850 14-32 and 5.83 gear,he wanted to go faster so we built a 200 dome roller cam and went 6.72 that ain't a very big improvrment for the$ spent. I am going to call previous owner of the car and ask him what it weighs the guy that has it now does not know. Later J.Smith 4621 racing


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