??? ABOUT RING & PINION SIZE

Old 01-12-2009, 02:55 PM
  #11  
zipper06
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Originally Posted by JEFF69Z28
great afr said the head and cam package i bought from them was good to shift at 71-7200 rpm.I was thinking 4.56 which is all i can find for my 8.5 10 bolt,where could I purchase a 4.30 ring and pinion?
Right here, or Motive also makes them.

But i kinda wonder how you're going to put that much torque to the ground with a 9" tire and a car weighing almost 3500lbs.

Zip.

http://www.ringpinion.com/ProductDet...px?ProdID=5428
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Old 01-12-2009, 02:58 PM
  #12  
dparker
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Jeff has a 3500lb car I think I'd install as much gear as I could to get it out of the hole. ET is in the first 300ft.
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Old 01-12-2009, 03:02 PM
  #13  
JEFF69Z28
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9" wide is all i can get for width in the 86 ss monte carlo,should i go to a taller tire?
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Old 01-12-2009, 03:02 PM
  #14  
TopspeedLowet
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Originally Posted by dparker
He's running a 4500 stall so the slipage will be minimal. I think the growth of the tire will off set the slipage of the convertor. I'm using a dragmath program thats been very close on actual numbers for me. A 27 in tire actually has 84.82 roll out.
I hear what you are saying but you come up with 400 RPM off using the same inputs and tire size I used. If you feel solid with your numbers ok, Good luck
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Old 01-12-2009, 03:09 PM
  #15  
dparker
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I would but I think about a 29 to a 30in tall is all your going to be able to get without cutting your fender wells. For every inch you go up in height it will make about 5mph difference. So if you went to a 4:56 and was turning to many rpms you could always go up in tire height.
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Old 01-12-2009, 03:14 PM
  #16  
JEFF69Z28
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THANKS FOR ALL THE INPUT.I THINK IM GOING TO GET A 4.56 AND IF IM TURNING TO MANY RPM'S I WILL GET A TALLER TIRE.
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Old 01-13-2009, 12:54 AM
  #17  
JEFF69Z28
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Originally Posted by dparker
I would but I think about a 29 to a 30in tall is all your going to be able to get without cutting your fender wells. For every inch you go up in height it will make about 5mph difference. So if you went to a 4:56 and was turning to many rpms you could always go up in tire height.
IS THAT 5 MPH FASTER OR SLOWER?
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