Help - 3.89 or 4.11 for my application!
#1
Help - 3.89 or 4.11 for my application!
Oh joy, another one of these threads...sorry, but I searched and couldn't find anything that fit my application.
So here's the deal, I have a full weight 99 Formula with a 383. 500 rwhp n/a, 238/244 cam, 4L60E w/ 3600 converter, 9" rear end, 28" rear tires, and a 150-250 shot of N2O. The car is not a DD, but I would like it to be somewhat street friendly for a weekend cruise every now and then. Would I be better off with 3.89 or 4.11 gears?
My main hesitation with the 4.11's is that I'm more concerned with 1st being too low and about running out of gear in the 1/4 (in 3rd while spraying), not as much with the cruise in OD (although that is a factor also)...what do you guys think?
So here's the deal, I have a full weight 99 Formula with a 383. 500 rwhp n/a, 238/244 cam, 4L60E w/ 3600 converter, 9" rear end, 28" rear tires, and a 150-250 shot of N2O. The car is not a DD, but I would like it to be somewhat street friendly for a weekend cruise every now and then. Would I be better off with 3.89 or 4.11 gears?
My main hesitation with the 4.11's is that I'm more concerned with 1st being too low and about running out of gear in the 1/4 (in 3rd while spraying), not as much with the cruise in OD (although that is a factor also)...what do you guys think?
#4
I'm thinking I'd like to stay between 6500-6800, I'm sure the engine could handle a little more...but I just don't want to push it. I'm kind of leaning to the 3.89 also, because IF I pick wrong, I can always drop to a 26" tire and make up for it...but I can't fit much bigger, if that makes sense.
#6
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A shorter tire = a net increase in gear ratio (numerically larger). Taller = net decrease (numerically smaller).
#7
You use a smaller tire to lower the overall effective ratio of the car. For example a car with 4.11 gears and 28" tires will drive similar to a car with 3.89 gears and a 26" tire. Putting 28" tires on a 3.89 geared car would be similar to a car with 3.55's and 26" tires.
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#9
Putting larger tires on a car has the same effect as putting high gears (numerically lower) into it...
#10
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Try our calculators out on our website. It will help you make a decesion on tire and ratio you wnat to run. Here is the link.......
http://www.jawsgear.com/calc_rpm.html
Jeff
http://www.jawsgear.com/calc_rpm.html
Jeff