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03-11-2014, 10:05 PM | #3 | |
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Join Date: Jan 2013
Location: Columbia, SC
Posts: 1,926
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Re: Torque within a usable range of Speeds
Quote:
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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My 65 C10 build: www.lugnutz65chevystepside.weebly.com Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild. Last edited by Lugnutz65; 03-11-2014 at 10:23 PM. |
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