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View Full Version : Aftermarket Headers / Procharger



Donzi22zx
07-31-2002, 08:39 PM
Which headers work best with the 454 mag EFI. I am thinkig of buying CMI headers. What to expect speed / installation. I also would like to put a 5 psi procharger in this boat, can the boat handle the speed, how fast will it go , will it hurt the engine.
Thanks for all the help
Bill

Moody Blu'
07-31-2002, 10:30 PM
your gonna like the answers...80+ mph almost definately

your gonna need to re prop with like a 29-34 pitch

frank would know.

HyperDonzi
07-31-2002, 11:08 PM
that sounds hella ill.

Lil Grizz
07-31-2002, 11:40 PM
expect a 15 mph gain at least. the boat is pretty stable up until 75-80 ish. The ride at 75 is as sure footed (in my opinion)as the ride at 60. Above 75 the boat begins feeling too small for the speed. Depending on what your target RPM is you would be looking at 28 to 30 inch props