Quote:
Originally Posted by kurts1967
I already own a Tremmic five speed and have 350 gears that I do not want to change. The representative at Ford racing said to me that that motor is not happy cruising down the highway at less than 22 to 2500 rpm's. To me that is high. With all my gears and tires etc. I should be about 2100 RPMs doing 75 miles an hour.
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It looks like you're looking for justification to fit a square peg (engine power band) into a round hole (your desired RPM for "happy cruising").
You may be better served and your time better spent by contacting a qualified engine builder and have an open discussion about your goals, your parameters and what a solution might look like.
Brent Lykins (CC member blykins) is an engine builder who participates regularly on these forums and, based upon his previous contributions, is probably someone who could help you out.
Another option is Craft Performance Engines, a CC sponsor.