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hp vs 1/4 mile

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Old 12-09-09, 09:45 PM
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how much rwhp do you need to run 11.50s in a 85 rx7 with 3rd gen single turbo setup,4.30 gears and slicks ?

i have a 73 rx3 coupe backhalf street car, running a 93 single turbo, 76mm/ 96ar on pumpgas.what whp will i need to run high nines in the 1/4 mile ? any info will be helpful.

Last edited by mar3; 12-09-09 at 11:05 PM. Reason: Merged threads on same topic, don't need two sep threads here...
Old 12-10-09, 05:05 AM
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How much does the car weigh??
Old 12-10-09, 08:49 AM
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NY Car weight

Originally Posted by allthingswankel
how much does the car weigh??
2200lbs with driver
Old 12-10-09, 11:59 AM
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There are some calculators on the net like this one: http://robrobinette.com/et.htm. Seems about 300 whp could do it with a car that light.
Old 12-10-09, 12:38 PM
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+1 ^ but 400-450rwhp should def do it. But are you doing any thing about the suspention? Just because you have slicks doesnt mean your car will hook up and launch well..
Old 12-10-09, 09:08 PM
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Originally Posted by AllThingsWankel
+1 ^ but 400-450rwhp should def do it. But are you doing any thing about the suspention? Just because you have slicks doesnt mean your car will hook up and launch well..
85 rx7 has se rear 4.10 gears with stock suspension.
Old 12-10-09, 09:09 PM
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Originally Posted by pumpgas
2200lbs with driver
sorry 2750lbs with driver. my rx3 weighs 2200 with driver
Old 12-11-09, 02:48 PM
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If it is going to be just a drag car i say get some shocks and springs that are gunna let you sqwat and go. Maybe some trac bars? Honestly i dont even know if they make thos off the self but im sure with a little time and effort you could fab some up yourself. Or get someone to do it for you.
Old 12-15-09, 09:03 AM
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450-500 whp range should be sufficient to run 11.5 or less in a 2800lb car with slicks pending you hook nicely and don't have any hiccups down the 1/4 mile.
Old 12-29-09, 08:11 AM
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I was running 10.4's in my FD with 519 rwhp on 295 wide KDW2's, setup on Tein Flex Coilovers. My car weighed about 2,900 lbs with me in it. Good luck with your build
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