05-01-2016, 06:27 AM
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CC Member
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Join Date: Jun 2013
Location: Sacramento,
Ca
Cobra Make, Engine: Superformance, 427SO
Posts: 389
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Not Ranked
Chad,
My car has a 427 side oiler making about 500/500 HP/Tq with a Tremec 5 speed, .64 5th gear ratio and 3.73 rear end ratio. This combination works very well and I really like the ability to cruise at 70mph turning about 2300 RPM vs about 3300 RPM if I had a 4 speed. The only complaint I have is that with the 3.73 rear end ratio and the torque available, first gear is almost not needed. I think the ideal combination would be a Tremec 5 speed with .82 5th gear and a 3.31 rear end gear. One thing for sure, I would never go back to a 4 speed transmission. I see absolutely no advantage since the 4th gear ratio in both the 4 speed and the 5 speed is typically 1:1. The only reason I can see for the 4 speed is if you are trying to replicate an original Cobra as closely as possible.
Just my two cents.
Ted
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32Likes
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