Marine Block

Discussion of the Marine / Industrial Hemis.

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Marine Block

Post by scottm » Wed May 29, 2002 5:30 pm

Is there any difference between a marine block and
those used in automotive applications? And is there
any difference between reverse and normal rotation
marine blocks? Will the crank, heads, and/or intake
from automotive engines work on a marine block?

Scott Moseman Admin


Marine engine rotation

Post by BoatHemi » Fri Nov 15, 2002 3:01 pm

The rotation of a marine block is a function of the gear box (v-drive, straignt drive, reduction, etc. Not the motor rotation. The gear box provides the counter rotation.

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Joined: Tue Jan 14, 2003 11:51 pm
Location: Nebraska

Marine block- Industrial block- Reverse rotation

Post by IndustrialHemiGuy » Wed Jan 22, 2003 11:20 pm

Scott, The Marine/Industrial blocks were made from the same molds as the car blocks, but there was a difference. The difference was the material , the marine/Ind had a 5% nickel content mixed into the cast , which made these blocks extremely wear resistant (providing the air cleaner is present,dirt will wear out anything). I believe these blocks were also physically tougher than the automotive blocks. The reverse rotation motors were different only in the camshaft and distributor drive . A Dodge dealer in Fairbury Nebr used to stand the reverse rotation motors up on the tail end (bellhousing side) and couple a wellshaft to the engine crankshaft thus eliminating the need for a driveshaft or gearhead, they also had to run a dry sump oil pan with a remote oil supply (really unique). The truck motors used an intake manifold with a thermostat in the manifold . I have never seen a ind 56 or 56a with this setup. The 56 ind & 56a ind both used car type manifolds. Dean
55 Dodge truck 331 Hemi,59 Dodge 2wd 354 Hemi,w/howards cam(HOT ROD!!!). 59 Dodge Power Wagon 331 Hemi (A TRUE POWER WAGON). 1975 Dodge Bighorn semi tractor LOTS & LOTS of Industrial Hemis, 2 Dodge Hemis, 3 DeSoto Hemis, 392,331,Firepowers

Gregg Dearth
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Joined: Wed Feb 26, 2003 2:17 pm

Post by Gregg Dearth » Wed Feb 26, 2003 2:25 pm

If anyone needs a 331 marine block, I have one available, make offer. No heads, or drive gears. But has cam, crank, rods, pistons inside and dual 1 barrel manifold. Removed from boat that burned. Located near Buffalo NY.
Dual quad M45sp3 in a 1956 Century Coronado

Les Longanetti
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Joined: Sun Mar 06, 2005 10:14 am
Location: Valparaiso, Indiana

Hemi Powered Boat

Post by Les Longanetti » Sun Mar 06, 2005 8:18 pm

In the last year or two there was an artical about Dustin Whipples twin Hemi powered eliminator boat. do any of you happen to know what issue of Hot Boat or Power Boat it was in? I would really like to read about that boat but I have no idea as how to get the magizine with out knowing which one or what month or year. appreicate any help..

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