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rdane rdane is offline
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Join Date: Oct 2002
Location: East side
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Why did my peak rev range change?

My 3.0 with 20/21 cams had peak HP @ 6400 and torque @ 5500.

My 3.4 was built with the same case and heads using the same 20/21 cams has peak hp @ 6100 and torque @ 5200.

The 3.4 used the same heads, a bigger throttle body, half mooned cylinders, lighter rods, lighter pistons, Ti keepers with HD valve springs and a boat tailed case.

Both used the same CIS system.

Why did the rev range drop on the 3.4? I would have thought it would have went up 300rpm, instead of down 300 rpm, with the weight drop on the internal parts and better breathing from the case/cylinder work.
Old 08-04-2004, 09:34 PM
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