Ford Racing 427

[cycleguy55]

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.

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.

[dallas_]

Kurt,
I have that motor and transmission combination and am very happy with it.

With mine, the motor isn't very happy lugging along at 1,700 rpm's or below, but seems quite happy over that.

I don't like highway cruising at high rpm's either. I have the .64 overdrive so can cruise at 75 just over 2,000 rpm's.

[Dwight]

I put thousands of road miles on a Keith Craft 408 with 531 fwhp and 539 tq.
3.55 gears .64 overdrive 3550 and 26" tires.

cruise all day at 2,000 and would go as low as 1,300 in 5th. We would laugh at how low it would cruise and not go into the "trailer hitch jerks".

If the motor has the correct cam and it is tuned correctly you should not have a problem cruising at 2,000 or a little less.

Dwight