quick question max rpm out of 502?
07-25-2003, 04:06 PM
#1
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quick question max rpm out of 502?
your thoughts,
450 hp gm crate motors, with upgraded crane valve train,stud girdles, merlin heads ported with inconel and sever duty valves, dart intake, etc..
what is safe as max rpm??
i have been told everything from 4900- 5900 rpm
your thoughts please....
450 hp gm crate motors, with upgraded crane valve train,stud girdles, merlin heads ported with inconel and sever duty valves, dart intake, etc..
what is safe as max rpm??
i have been told everything from 4900- 5900 rpm
your thoughts please....
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07-25-2003, 08:03 PM
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5900 too high, unless you like rebuilding all the time. 5400 is as high as I go on my blower motors, and then only for short time periods. 5000 is great if your boat planes good with props on it to limit RPMs that low.
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Steve Gresham
'03 Donzi 33ZX
Steve Gresham
'03 Donzi 33ZX
07-25-2003, 08:15 PM
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The bottom end of a 502 Mag should turn 6500 no problem. I ran my 502 in a previos boat 5600 with no problems. It was a solid roller motor though. Valve train will be your weak link..
07-25-2003, 08:40 PM
#9
The bottom end will take 6000 RPM all day but it does wear it out quicker. The max RPM will depend on how well your engine breathes. More in and out = more RPM.
I ran mine a whole year at 5900 RPM untill I bought new props. I am proping mine for 5400 RPM.
I ran mine a whole year at 5900 RPM untill I bought new props. I am proping mine for 5400 RPM.
