Ok sorry I have been away for a few days lots of hurdles.....

1) No current manufacturer is going to build new boats for a factory class and the line to buy those boats is not around the block.
2) The old boats will attract attention IF they come out to race.
3) This is not an all Mercury program however it will be a 502 based engine program.
4) If you have no positive input please refrain from posting I happen to know all the negatives.
5) If you have a boat and are interested email me [email protected] or text me 6093175466.

I have been making progress behind the scenes and I'm getting more and more excited.....who knows if it will work I certainly don't but once upon a time it did!!!

DISPLACEMENT: *Maximum 510 CID, with a 4” stroke crankshaft only.* Crankshaft throws must be in accordance * with OEM specifications.


COMPRESSION RATIO: Maximum compression ratio of 9.0:1.*


CAM: *Any hydraulic roller cam *with *a *maximum intake lift of .610 inch and exhaust lift of .632 inch measured at the valve with zero lash is the only cam allowed, with an OEM stock gear timing chain, no belt driven timing chain systems are allowed.* Variable cam timing not allowed. * * **


BLOCK: Chevrolet designed blocks, with their OEM specifications, NO MODIFICATIONS, manufactured by *General Motors, World Products and Dart must be approved by Stinson **

MATERIALS: *Crankshaft, Flywheel, connecting rods, pushrods, and wrist pins must be made of steel, Titanium or other materials are not allowed


HEADS: The approved cylinder head is the Dart Pro I Head, Part Number*19100010*M (bare head) or 19100112M (complete head with valves and springs) with their stock OEM specifications, no modifications allowed. 1.7 ratio rocker arms on stud mounted rocker arm shafts only. The head serial numbers must remain on the head and may not be defaced or altered.* The Stock Mercury 525 OEM Head with it’s OEM specifications and no modifications may be used. **


INTAKE MANIFOLD: Any stock cast intake manifold with a Holly Carburetor 4150 style (size) base may be used. No fabricated or tunnel ram type manifolds may be used. Intakes may be port matched up to 1 ½ inches to match cylinder heads. Carburetor spacers or adapters are NOT ALLOWED.


INDUCTION SYSTEM: *One Holley carburetor 4150 style(size) only is allowed.* Naturally aspirated only, no forced induction allowed.


LUBRICATION (ENGINE): *External oil pumps or dry sump systems are not allowed. * * * **


IGNITION SYSTEM: *Engines are required to use the MSD Digital or Analog Ignition system limited to 5800 RPMs. Crank triggers and belt drive ignitions are not allowed.


ENGINES ARE REQUIRED TO HAVE THE IGNITION SYSTEM LIMITED TO 5800 RPMS AND HAVE A G2X DATA LOGGER INSTALLED and maintained to Monitor the RPM level during the race.* The RPM level during the entire race must be verifiable on the Data Logger*

Thoughts

There are a lot of holes in your engine rules. With those rules you can make well over 500 hp. The more rules you have the more you will have to tech the boats/motors this will take a lot of time and money. You are better off giving a cubic inch stipulation, cast intake single 4. And let everyone run what they bring. If you put something together like that you can count the old F1 Donzi in. Other than that I don't believe you will have the resources to tech the boats properly and it's not going to be fair.

Looks intesting. Maybe lose the max com ratio in favor of, must be able to run on 93 oct @ 32 degrees. I only say as we run a higher ratio and not lookin to go down. I think most guys I know with a 502 based na motor run 600 hp give or take . Is that the target? Very do able and economic with oem heads. Just my 02

I bet if I offered you 10k for every win you would close your mouth and pay attention

That's kind of the target but again I'M LISTENING AND VERY FEW ARE TALKING

Just as a discussion point, the engine rules as stated pretty much exclude most class 6 boats.

The key point to me as a competitor, is engine tech.

With the spec the motor should be aprox. 625 hp, should have one on a dyno soon and can give you more info.

But, a single 502/509 with stock heads and 1 carb is fairly inexpensive to build.

With the smaller race course that we race today, the big hp high number isnt as important as torq. Its not how fast u can go its how fast u can get there.