Building a car for 1/8 mile drag racing
03-30-2009, 06:19 PM
#1
Member
MASTER JOURNEYMAN
Thread Starter
Join Date: Aug 2007
Posts: 45
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.
04-01-2009, 06:39 PM
#2
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RACING JUNKIE
Join Date: Apr 2003
Location: Greenville s.c.
Posts: 3,236
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
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
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "
Bjuice..
"I'M YOUR HUCKLEBERRY ! "
04-01-2009, 07:46 PM
#3
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MASTER BUILDER
Join Date: Jan 2007
Location: Batesville Ms.
Posts: 167
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.
04-02-2009, 03:11 AM
#4
Senior Member
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Join Date: Feb 2009
Posts: 510
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.
04-02-2009, 02:34 PM
#6
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RACING JUNKIE
Join Date: Apr 2003
Location: Greenville s.c.
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Re: 1/8
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.
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/
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "
Bjuice..
"I'M YOUR HUCKLEBERRY ! "
04-02-2009, 03:57 PM
#8
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RACING JUNKIE
Join Date: Apr 2003
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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
__________________
Bjuice..
"I'M YOUR HUCKLEBERRY ! "
Bjuice..
"I'M YOUR HUCKLEBERRY ! "
04-02-2009, 06:10 PM
#10
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MASTER BUILDER
Join Date: Jan 2007
Location: Batesville Ms.
Posts: 167
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
