318 stroker motor 330 HP 349 cu.in.

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honestcharlie56
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby honestcharlie56 » Wed Dec 07, 2016 1:51 pm

I'm pulling my 318's Friday......wish I could follow in your footsteps!!!
1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's

javalin390
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby javalin390 » Fri Dec 09, 2016 8:26 pm

Been following this thread, the end result sounds great. I'm going through two schools of thought as I read the posts. First being I am a 25 year mechanic, specifically GM, second being that the best way to retain everyday reliability is to keep things close to stock. I say this from years of owning old hot rods, where I try to keep the ignition systems close to stock, only because, if I ever broke down with an ign failure, just simply pick up another module at any parts store, as opposed to some fancy MSD or Petronix where I would have to special order it. That said, being a GM guy, my opinion is the HEI is the best ignition system ever designed. You said you are running HEI's. I'm aware Davis Unified makes them for Mopars, and am curious what brand yours are. Do they have vacuum advance? Do you have any stats on them? Were they specially modified for marine use? Would love to know more.
Jim Elias
1974 37' SedanFlybridge
Twin 360 Chryslers.
Marblehead, Ohio

Trowerpower
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby Trowerpower » Sat Dec 10, 2016 10:59 am

Hey Jim, they built them specifically for the application. I have used them for two seasons with no issues. I have not touched them, Approximately 120 hours of run time. They cost $968 including their spark plug wires. I went with straight spark plug boots and added 4" to the stock 318 wire lengths to get around the exhaust manifolds. They fit well. I am running 11 degrees of advance, no vacuum advance for marine applications. Check out http://www.performance distributors. Com. I hope this helps.
Trower Power
1987 32ft Marinette Sedan Flybridge
Blue Sky
twin 392 Chrysler Stroker Motors
Performance Distributors
750 Edlebrocks
fresh water cooled
1.5 to 1 velva-drives
Onan 6.5kw gen set

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Busia
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby Busia » Sat Dec 10, 2016 2:22 pm

If you don't have vacuum advance, I would guess you have mechanical or centrifugal advance (counterweights).
BUSIA
located in Ketchikan, Alaska. Gods country
32 foot Marinette express. (no fly bridge)
twin 350 Crusader (Chev 350) engines
1:1 Borg Warner velvet drive transmissions
Closed cooling (antifreeze in the engine)
Proud to be retired IBEW

Trowerpower
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby Trowerpower » Sat Dec 10, 2016 10:46 pm

I believe they are mechanical advance.
Trower Power
1987 32ft Marinette Sedan Flybridge
Blue Sky
twin 392 Chrysler Stroker Motors
Performance Distributors
750 Edlebrocks
fresh water cooled
1.5 to 1 velva-drives
Onan 6.5kw gen set

Fastjeff
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby Fastjeff » Wed Dec 14, 2016 1:41 pm

Boats don't use a vacuum advance.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

EWRice
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby EWRice » Wed Dec 14, 2016 5:37 pm

Mechanical advance is the primary method of spark control for (almost) all engines. The only exceptions I have seen are engines designed to run at one speed, ie generators. Vacuum advance is a supplement to mechanical advance to gain economy under varying loads at a given rpm, ie pulling a trailer up a hill at 2200rpm vs cruising down a flat highway a 2200rpm.

Some early marine engines used a vacuum advance until the mid 1960s. My Graymarine 327 has vacuum advance, but it is about worthless. There may be a very small range of speed/rpm where it might do something.

EST is full computer control of advance. Crusader started using the GM EST distributors in their engines, and now there is a kit available to put this distributor in any original Chevy V8, 4.3l V6, and the two I4 engines. Includes new distributor, coil, brackets, wiring harness and plug wires. Highly recommended for anybody upgrading a GM points or Thunderbolt ignition system. Uses same cap and rotor as 87-95 chevy trucks.
Muskegon Lake
1972 32' Express flybridge
Twin 318s
On board air & prime 920
1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson

Trowerpower
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby Trowerpower » Wed Dec 14, 2016 10:20 pm

Okay after further review DUI distributors have a weight and spring arrangement for spark advance. Now I am speaking over my head. My boat runs like a watch with these distributors. Contact Performance Distributors for more information.
Trower Power
1987 32ft Marinette Sedan Flybridge
Blue Sky
twin 392 Chrysler Stroker Motors
Performance Distributors
750 Edlebrocks
fresh water cooled
1.5 to 1 velva-drives
Onan 6.5kw gen set

Trowerpower
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby Trowerpower » Wed Mar 08, 2017 7:20 pm

Happy New Year to all of my fellow Marinette owners. Plan to dewinterize BlueSky and the 392 stroker motors March 25th weather permitting. The engines are under warranty until mid July 2017 so i want to use them as much as possible. So far all is well. Lets hope it stays that way.
Trower Power
1987 32ft Marinette Sedan Flybridge
Blue Sky
twin 392 Chrysler Stroker Motors
Performance Distributors
750 Edlebrocks
fresh water cooled
1.5 to 1 velva-drives
Onan 6.5kw gen set

honestcharlie56
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Re: 318 stroker motor 330 HP 349 cu.in.

Postby honestcharlie56 » Wed Mar 08, 2017 9:05 pm

awesome man, I can't wait to see video's of these bad boys under way......lets see it.
1990 Marinette 32 Sedan Flybridge "Hubba"
Twin Chrysler 318's