tripps

Did anybody ever dynotest the 731s 741s,hp 500s,525s,efis for comparison in general? Just looking for what works,502 hp 500 type motor cmi ex,not fi

HPJunkie

9.5, 502 aluminum heads 741 was 560hp

cig28

9.8 compression, 308 steel dart heads, 741 cam. Dynoed @ 620hp

JaniH

Nice, what intake? Dyno headers or marine manifolds?

JaniH

Soon we know what my 509cid makes with Ron sporl 240/245 050", 114lsa.

cig28

Dyno headers , world intake with the brass in the thermostat housing. I’m figuring about 580-590hp at the prop shaft.

cig28

I was going 509 but with new gm 502 blocks I wasn’t going to bore the out to gain a little more hp.

Griff

There was a thread on OSO with exactly what you are looking for with those cam comparisons. It may have been with desktop dyno info. I'll do some searching and see what I can find.

Found it. It was done with a 540ci combo Who wants to play - Offshoreonly.com

tripps

Thanks Griff

KAAMA

Very interesting and informative archive resource on the Crane 741 cam, Griff. 👍