Marine Engines

[327power]

Can you drop in a marine engine in a daily driver? Besides induction and all that, aren't they basically the same engine?
I saw a 262 V6 from Jegs that made 260hp and 300ft lbs. Pretty neat!

[eventhorizon66]

I don't see why not.  Another member on here just got done installing a marine 454 into his Jimmy.

[327power]

Really?...so basically, a marine engine IS a regular steet engine? I thought that maybe they had different types of bearings or something for water use. Very interesting. That means if I see a good deal on say...a marine 350, it'll work just fine as long as I swap over the intake and exhaust, etc?

[Irish_Alley]

the carb is diffrent im not sure how but i dont think theres a filter on them

[Blue 82]

The Main and Rod bearing clearances are a bit more generous in a Marine engine
same goes for certain types of pistons and ring end gaps.

Marine engines run much cooler due to raw water cooling (some have heat exchanger(s) and use thermostats). We were reverse cooling SBC's way back in the early 80's.

Marine engines get different gaskets too (usually of (much) higher quality than passenger vehicle stuff)

The exhaust valves are different also, on some SBC's the exhaust stem diameter is 3/8" vs 11/32" for a passenger vehicle and are sodium filled ($53 each last time I bought a set). Rotators on the exhausts are a must, except in stuff like Drag boats and crazy roller cammed offshore racers.

The cams are different also, due to the somewhat restrictive marine manifolds and torque requirements.

Can you use a marine engine in a truck?

Sure, many a Mercruiser 454 has found it way into 73-86's down here.

[Jim Rockford]

sorry man, but the only reverse cooled Chevy was the LT1. and that didn't show up till 92 

[327power]

Anyone ever heard of a marine 292? Straight 6 that is. I wonder if they make a ton more power than the street ones. Like I mentioned earlier, the little marine 262 is is making more power than a Goodwrench 350!

[Jim Rockford]

You can make just about any engine fast, Its just how much do you figured you will spend before it becomes more trouble than its worth.

[Blue 82]

sorry man, but the only reverse cooled Chevy was the LT1. and that didn't show up till 92  

GM did not invent the reverse cooled SBC
They introduced a reverse cooled engine for passenger cars.

Raw water cooled engines don't use a thermostat
Intake water varies from 60 to 90 degrees down here
Instead of flooding the block with COLD water
We cooled the heads first.

Marine engines use an external, belt driven water pump to draw water through the hull
From there we would plumb the transmission heat exchangers in (Borg Warner V drives)
From there it would got into the back of the intake manifold, through fittings inserted in the intake manifold, next to the dizzy
The thermostat housing was blocked off
Water would exit the block where a passenger car water pump mounts
Then be plumbed into the exhaust manifolds where it would exit the vessel

On a marine engines you don't need your normal passenger vehicle accessories
AC compressor, power steering pump, AIR pump etc.......
All you need is an alternator and an external water pump thats driven from the crank pulley (only).

GM never produced a reverse cooled BBC
But here's a few pics of a 725hp 588CI BBC



[/img]

[Blue 82]

[Jim Rockford]

Looks good, thanks for the lesson, I just question alot of crap I hear on the internet these days. people think some weird stuff so you can understand.

[Blue 82]

Since this one is fed from the thermostat housing
Deck plugs were added (on the front 2 cyls) to route the water to the rear of the block



A quick vid of it on the Dyno
http://www.youtube.com/watch?v=-XO-rEY3_n0

[327power]

I have to agree on the more trouble than it may be worth theory. Thats probably the main reason why I shyed away from that 292 build.

[Marc]

292 were popular in fishing boats here years ago.  Inline engine was easy to work on and would work at 1800 rpm all day long.  The GM dealers in town stocked them just for fishermen.  Speed was not an issue. 

[team39763]

According to SummitRacing, my 94 TBI in my C3500 has a reverse rotation water pump...I think.

sorry man, but the only reverse cooled Chevy was the LT1. and that didn't show up till 92 

According to SummitRacing, my 94 TBI in my C3500 has a reverse rotation water pump...I think. Is that the same thing as reverse cooled?