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02-04-2016, 03:05 PM | #1 |
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Location: Columbus, OH
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Gear Ratio?
I am going to be ordering a 12 bolt from Moser for my 95 Firebird Pure Stocker. Using the online calculators like Wallace Racing seems to indicate with a 28" tire the right gear would be a 4.56. Assuming the car runs right it should be in the 110-115mph range. Are my calculations right or do I need less or more? Keep in mind this is a Pure Stocker with restricted valve springs so can't handle high revs.
Thanks, Frank |
02-04-2016, 03:55 PM | #2 |
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Re: Gear Ratio?
My bracket car had a 28" tire, went 116 MPH and was turning 6400 RPM if that helps.
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02-04-2016, 09:05 PM | #3 |
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Re: Gear Ratio?
That does help, thanks.
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02-07-2016, 01:23 PM | #4 |
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Re: Gear Ratio?
I'm looking at changing gears in my 3rd gen bracket car. The Wallace calculator doesn't seem to allow for converter slip, assuming you have an automatic. I run 29" tall tire and a t350 with 4.50 gear and at 100mph in the 1/8th my car is at 5900-6,000RPM. Wallace calculator says 5213 for my gear/MPH.
Wallace uses MPHxGear Ratiox336 divided by Tire Height=RPM Last edited by Eman; 02-07-2016 at 01:27 PM. |
02-07-2016, 02:56 PM | #5 |
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Re: Gear Ratio?
Slippage on my low HP stocker (8" converter) is about 6%.
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