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

Re: Gear Ratio?
 

My bracket car had a 28" tire, went 116 MPH and was turning 6400 RPM if that helps.

Re: Gear Ratio?
 

That does help, thanks.

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

Re: Gear Ratio?
 

Slippage on my low HP stocker (8" converter) is about 6%.