Recommended redline rpm

[letitbe]

Anyone know what the redline for the Ford Racing 342 Stroker/GT40 alum. heads?

Letitbe

[69 Mach I]

Originally posted by letitbe


Anyone know what the redline for the Ford Racing 342 Stroker/GT40 alum. heads?

Letitbe

It will depend on your internals: Stock or forged crank? What kind of connecting rods?

[Rick Parker]

This is a very pointed question letitbe. The people or (group) that designed the engine internals or that put the package together would be best informed and qualified to answer your question.

Rick

[bkozlow]

I believe it is about 6200 rpm, at this point your lifter are going to go out and start floating.

bkozlow

[etimothy]

It depends on a lot of factors including those mentioned above. I'm running a CHP street fighter shortblock with Performer RPM heads. Perhaps I am making a wild assumption but...Edelbrock cites the power band for the Performer RPM package as 1500 to 6500. So I have blindly set the rev limiter at 6500. I haven't quite hit the rev limter yet and have not yet experienced valve float. There is however another important (make that very important) factor to consider. Pay close attention to the rated RPM of your flywheel, especially if it is not SFI certified. The last thing you want is to lose your legs from the knee down

[rcweingart]

You also have to consider your cam, valve springs and valve train. Solid lifters run higher than hydraulic. Stiffer springs/double springs with more load on the seat enable higher rpm before float. Roller cams have higher ramp acceleration and required stiffer springs. Lighter weight valve train components, ie, rockers, push rods, retainers, enable higher rpm before vale float. All things equal, 6500 rpm is not unreasonable but the longer you run at that rpm, the greater the chance of breakage.