Drag Racing Technique Improve your track times

Extreme rpm's!!!

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Old Feb 2, 2003 | 11:36 PM
  #1  
85berlinetta383's Avatar
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From: red deer alberta
Question Extreme rpm's!!!

well I didn't put 4.11's in my car, they came with em when i bought it, but for now im stuck with them. I need to know what i can do, because right now I'm goin through the traps at like 6500+ rpm and thats not cool on a brand new motor, I would like to have it around for a little while. anyone have any suggestions on what to do? is there any way to force the 700R4 into OD?
Old Feb 3, 2003 | 12:34 AM
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Slayn's Avatar
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From: Jacksonville, FL
I would move up to a larger tire, your sig says you have 15's so I think 16's would help some. That's the only thing I can think of besides rear-end/tranny work
Old Feb 3, 2003 | 06:18 AM
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From: Columbia, SC
There's something that can be done to the 700R4 to make it shift into OD at WOT. I can't remember what it was (not to mention I'm not a tranny guy), but I seem to remember it was relatively simple and inexpensive - like a simple mod to the valve body. You may want to try posting this on the 3rd gen board to see what you get.

Other than that, a taller tire will drop the RPM through the traps. With 15" wheels you have a BIG selection of tires - a lot more than for a 16" rim. But then you would have to have your speedo fixed to read right. Good luck.
Old Feb 3, 2003 | 08:31 AM
  #4  
cASe SenSiTive's Avatar
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From: Dangerously close to Detroit
Don't bother with taking the trans to OD. Just run a taller tire, like a 28".
Or run a short tire and drop your rear-end ratio.
Old Feb 3, 2003 | 06:32 PM
  #5  
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From: Orem-Utah-USA
in your sig you were complaining about traction and a taller tire will help with that and your rpm's
Old Feb 6, 2003 | 02:32 AM
  #6  
85berlinetta383's Avatar
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From: red deer alberta
well it's definatley tire time anyways, I will look into a taler tire for sure, this may also help me get closer to the correct speed. My speedo has always ready about 10k/h over.
Old Feb 6, 2003 | 09:05 AM
  #7  
TedH's Avatar
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Move to a 28" tire. You will need a hacksaw for the rear fender lips. I have MT ET Streets, 28" x 12.5" x 15" mounted on 10" x 15" Cragars with a 6 1/2" offset and the fender lips have been flared one inch to cover the top of the tires. The 12.5 width is a sidewall measurement and will not fit in the wheelwell with a 7 1/2' backspace without some work.
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