Quote:
Originally Posted by Lugnutz65
I considered using a 1988 WC Camaro T5 with my 250 L6 but decided against it. Fifth gear is 0.63 and calculations suggested my engine would lug unless I was doing 70MPH. RPMs would be 1906 at 70 MPH and 29" tire + 3.73 rear. So basically I'd have to downshift to 4th gear below 65 MPH. I decided to use a T5 with a 0.73 5th gear.
What kills me is that GM put that same T5 with a 0.63 OD in a 1988 Camaro with a 26" tire and 3.08 rear. Yes! A 3.08 rear!!!!
That Camaro had a 305ci V8 and RPMs would be 1755 at 70 MPH with a 26" tire and 3.08 rear. The V8 had enough torque to make it work but 1755 RPMs is kinda low. It seems to me that the Camaro would have had the same problem and couldn't use that 0.63 gear below 65 MPH. That's a guess of course since I have never driven a 3rd generation Camaro with a T5 and 0.63 OD.
If my truck had a V8 then I would have used the T5 with the 0.63 OD.
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will run a spreadsheet just for your set up, send me a pm here and I will email you the information. You have plenty of torque so getting the speed right will be the deal.......Kieth
ran the information, you are correct plenty of torque no matter what speeds are:
3:73------72mph @2000rpm
3:90------68mph @2000rpm
4:10------65.5mph @2000rpm all have plenty of torque, if there are no 3:90s' for your rear end then the 3:73 are the correct choice.....Kieth