Quote:
Originally Posted by cameron02
With modern transmissions (overdrive) I reckon you might as well go around 4 to 1. I have a 3.91 to 1 and revs are still quite low on the freeway thanks to overdrive. Unless you want to break the land speed record I cant see the point in installing tall gears (like 2.92 or 3 to 1) with a modern transmission.
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That depends I feel on what first gear ratio you have. If for instance you had a TKO500, earlier 3550, or T5 with a 3.27 first you could/would only use it for pulling stumps. It would be way too short and cause so much wheel spin one wouldn't use it. It would be faster and as effective to start in second.
Even a 2.66 first T56 with a 3.91 rear will give you tyre frying take off so may be more effective with a 3.7 rear. I tend to feel the more torquey engines would be better off the 3.5 or 3.7.
At the other end of the rev range it would be cam dependent. ie a T56 with a .74 fifth and 3.91 rear will be pulling 2100rpm at 100KPH.. In 6th at the same (legal) speed it would be at 1420rpm so even with a mild cam it (6th) may well not be truly usable until you got well into the 130KPH mark at 2150rpm.
All very personal tho.