Darts 4 Me
Member
Anyone have any general information on what to
keep an eye out for.
keep an eye out for.
340 marine engines.
- Thread starter Darts 4 Me
- Start date
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Ironracer
Gearhead
Man I never knew they used a 340, as a marine engine, that's kick ***!
Ironracer
Gearhead
Same thing I have found. Like some deep well pump Hemis and such like that some of them even rotate the wrong direction
Opposite direction would be a better description. It wasn’t wrong in the duel engine boat.
Ironracer
Gearhead
Oh Heck No! Counter Rotation on any dual! ( I worked at a Marina as a boat tech for a second)
I don’t understand
Professor Fate
Push the button, Max...
Marine:
Built for higher rpm usage than industrial motors, they regularly see extended use at higher rpm.
Dual engines had one running in reverse rotation. The reverse rotation engines used different starters, cranks, cams, oil pumps, distributors, and crankshafts; none of which are useable in a passenger car. If you have a RR engine, it's basically good for the block and heads, and a few small parts.
Built for higher rpm usage than industrial motors, they regularly see extended use at higher rpm.
Dual engines had one running in reverse rotation. The reverse rotation engines used different starters, cranks, cams, oil pumps, distributors, and crankshafts; none of which are useable in a passenger car. If you have a RR engine, it's basically good for the block and heads, and a few small parts.
Ironracer
Gearhead
If you've got two engines running in a boat you want one to go one way and one to go to the other, sorry bout that
Ya that’s what I was saying. It’s not wrong in the boat.
otherwise you'll just go around in circles!
Ironracer
Gearhead
Lol, or you would have to hard steer the other direction, and creep along like a crippled jet ski, cuz she damn sure won't be using any gas to go forward! it'll all be going to keep you straight!
Ironracer
Gearhead
Post edited
Coffee&Cars
Well-Known Member
Counter rotating props cancels out torque from the props. It makes a boat more stable. Also different types of hulls use different rotations. Some rotate inwards and some outwards.
Coffee&Cars
Well-Known Member
Love to find a industrial 340. The 318 was used by many boat manufactures. There are parts out there. Usually marine blocks have extra material in the main webbibg area.
valiantwagonguy
Well-Known Member
I had a 340 chrysler marine in my 1965 Pembrook mahogany hull cabin cruiser . It was a good motor . The boat was a single screw 28 ft and went thru the water real nice.It cruised at around 2500 RPM and drank around 8 gallons of fuel an hour Just gave away the service manual for Chrysler Marine ( genuine MOPAR ) to a friend .It covered 340 and 318 . There was also a 225 marine engine used in smaller light weight boats . Most of these motors were salt water cooled so be aware of that if you are going to build one for a car , rust never sleeps .
Hellrats
Just another dumbass
Some single engine boats, Correct Craft, used reverse rotation only. My 1968 Correct Craft Barracuda 318 is that way.
I think Direct drive prop boats use reverse rotation. I don't think IO's do. (inboard/outboard)
@71GSSDemon wil know I bet.
@71GSSDemon wil know I bet.
Mine is direct drive for sure, sounds right.
Mopar boats? These had 340's. Chrysler S-III Super Bee 1974 for sale for $10,000 Lot's of good photos.
on a single engine, it doesn't matter much. Each OEM will have their reasons. On multi engine, you would want an even spread (Standard rotation and Counter rotation) if possible
Darts 4 Me
Member
Thanks, guess they have steel cranks good blocks
if there not already rust buckets.Some had reverse rotation.
maybe my Dart would back up faster??
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