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Gear ratio decision, 4.1 4.3 or 4.56?

1326 Views 24 Replies 12 Participants Last post by  PHWOARchild
Currently a blast to drive but I want to try dial in the whole system even more, wondering of the 373 are just too mellow for what this combo needs? sometimes at part throttle acceleration it seems a little sluggish.. id like more instant snap if that makes sense..

Currently have 373, and its nice, but i wan to push the street factor the the limit - the 383 doesnt always have the brute low end of the big bocks, so some mods are necessary.

Cam is around 2000-6000 236° / 242°, 288° / 294°, 11:1 (installed straight up), 200/64cc alu heads, 5.7 rods. 850 dbl pumper brawler, Vic JR, 1-3/4 LT headers into 3 inch collector and 2.5 true duals. 373 posi, 2004R, 3k stall..

18-20 initial, vac adv disconnected .. Hei stock.
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I guess the only comment I have is the engine is built for top end power, that leaves the gearing choice of pursuing where the power is. This doesn’t really have any street drivability as the OEMs would define it.

I run a 2800 stall in a light vehicle with high gearing and a 350 with a lot less cam, so one of my impressions is you need more stall as well as stiffer gears and eliminate the lock up which probably isn’t available with higher stall anyway.

Basically sounds like a good design for a super T10 or equivalent 4 speed stick more than a TH200.

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