Offshoreonly.com - Dart vs AFR heads on HP 500

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This is the boat and those are the flow numbers for the heads. Dyno the motors and they made about 680HP at 5400RPM. The motors have about 80 hours on them now. Been running great.

With Del West inconel exhaust valves, the flow numbers were:
LIFT.....CFM @ 28"
.200.....147.46
.300.....187.68
.400.....245.14
.500.....281.84
.600.....304.88
.700.....316.20

The main reason the Del West over Ferrea or Manley was that the owner had a friend that worked at CV Products, a big supplier to NASCAR down in North Carolina, and he hooked him up with them for the same price as the Manley's.

KAAMA I would like to know who is Jim V and how to get ahold of him? I am building a pair of dart 540 motors for my formula been reading this thread lots of great and exciting info
makes me want to port the dart iron eagle heads to get more power.:evilb:

BMS Racing Engines call them they will help you with everything www.budzmotorsports.com

Quote:

Originally Posted by amazing1 (Post 2416752)

JimV's cell phone is (616) 889-0928

?i have 540 dart bottom with 345 dart aluimuna heads dart single plane intake not sure cam trying for 600hp ? are my heads to big :hitfan:

Quote:

Originally Posted by bajabob (Post 2417859)

?i have 540 dart bottom with 345 dart aluimuna heads dart single plane intake not sure cam trying for 600hp ? are my heads to big :hitfan:

A 540cid engine and heads with 345cc intake runners....some guys would say "yes" they're too big and some would say "no".

I'll just say this....I have some AFR 315cc CNC ported heads on my naturally aspirated 565cid engines in my 32' Active Thunder and I can stay right with my friend's 32' Active Thunder with his freshly rebuilt 556cid, Dart Pro-1's, rebuilt 8-71 Supercharges....his engines dyno'd @815hp with dry exhaust and he cannot pull away from me at WOT or at 3500rpm on the way up the RPM range he cannot pull away from me---I am right there! We tried it a few times this past summer.

I thought for sure he would blow me away...and he even has larger cams than I do.

It should say something about large cams and large heads. I have smaller heads and cams than what most guys would run....and my engines run up to 5500-5600rpm.

Bob Madara engineered my head/cam combination and Dave Wesseldyk assembled the engines.....still running strong after 3-4 seasons now (roughly 180-200hours).

kaama that pretty cool you can run with your buddy like that i am impress i am making my motor naturally aspirated i am hoping to have pletty of tork and horse power 3500rpm to 5500 rpm :hitfan:

thanks for the info:evilb::ernaehrung004: