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#1 |
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I have an 1/8 mile bracket car. It's a '67 camaro, 2700 lbs. wet, small block , powerglide , 14/32 tires with a 538 gear. Does anybody know what my RPMs might be running a 1/4 mile?
Last edited by watsongarage; 03-26-2009 at 01:27 PM. |
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#2 | |
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If you know what your 1/8mile ET and MPH is you can determine your approximate 1/4 mile ET and MPH. One quick way to estimate is to look at the index system for the NHRA classes. Once you have an approximate 1/4mi. MPH use the following formula. It will be failry close, will vary some depending on the slippage in your convertor. rpm = (mph x gear ratio x 336) / tire daimeter. Hope this helps.... Ron 33 S/C
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#3 |
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This wont answer your question i dont think..
but another way to find out what your car will run in the 1/4 is to multiply your 1/8 mile time by 1.55 |
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#4 |
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I only gain 400-500 RPM's out the back in the 1/4 over what I'm turning at the 660' mark, but my car is heavier, and slower accelerating than yours, I'm sure.
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#5 | |
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I have a ventura (looks like a nova) 2680 lbs going down the track, glide, 5.13s 29.5 tire, the 1/4 strip was 6500 on the money. blew the motor put in a different motor, less cam etc. same running gear and it turned about 6300, just install 4.56 and now 5900. Maybe this will give you some idea |
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#6 |
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4.56 gears and 28" tires. 6,000. You may be turning 6,500 to 7,200.
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#7 |
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go to TCI AUTOMOTIVE.COM they have some very good racing, rpm and e.t type calculators and so far have been very very consistant. its under racing calculators.. hope this helps........phil
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#8 |
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HERE IS THE LINK----WWW.TCIAUTO.COM----GO TO TECH INFORMATION,RACING CALCULATORS
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#9 |
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I'm guessing about 7000-7200.
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#10 |
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Search the net for wallace racing they have all kinds of calculators to figure out a bunch of stuff. I think its Wallaceracing.com or something like that look under calculators.
Rob |
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