73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Performance => Topic started by: 327power on December 07, 2009, 06:41:00 pm
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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!
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I don't see why not. Another member on here just got done installing a marine 454 into his Jimmy.
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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?
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the carb is diffrent im not sure how but i dont think theres a filter on them
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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.
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sorry man, but the only reverse cooled Chevy was the LT1. and that didn't show up till 92
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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!
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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.
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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
(http://i857.photobucket.com/albums/ab138/Billy-Biscayne/SDC10130.jpg)
(http://i857.photobucket.com/albums/ab138/Billy-Biscayne/SDC10253.jpg)[/img]
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(http://i857.photobucket.com/albums/ab138/Billy-Biscayne/SDC10004.jpg)
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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.
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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
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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.
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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.
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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?
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Thats's some really cool info, Blue 82. Great pics.
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no its not the impeller is just made to the vanes are reversed from a reg v belt normal rotation pump, the water still flows through the block the same way.
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Some GM vehicles may be equipped with a reverse-flow cooling system which operates differently than a conventional type cooling system. The specialized components of this system include a gear-driven water pump with cast internal cross-over passages, an inlet-side thermostat and a pressurized high fill coolant reservoir. In this system, coolant is routed from the water pump, directly to the cylinder heads. When the heads are adequately cooled, any accumulated vapors are vented off, and the coolant then circulates through the engine block. After the coolant leaves the engine block, it returns to the water pump, moving through an internal passage into the radiator. There is a thermostat on the inlet side of the pump which meters the coolant temperature as it flows from the radiator and tries to enter the water pump casting. The water pump, which is driven by the camshaft, which is the center of the system, has cast internal passages which route coolant through the engine without sending it through the intake manifold, eliminating possible leaks. The gear-driven pump ensures coolant flow even if the drive belt breaks. The reverse-flow cooling system is advantageous because it reduces the overall cooling system pressure and basically eliminates pitting or disintegration of the water pump and seal. In addition, routing the coolant to the cylinder heads first promotes higher bore temperatures and less ring bore friction, increasing output and horsepower. Due to the increased temperature of the cylinder walls, which created higher oil temperatures, engines with reverse-flow cooling systems may be equipped with an engine oil cooler or use synthetic oil.
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Some GM vehicles may be equipped with a reverse-flow cooling system which operates differently than a conventional type cooling system. The specialized components of this system include a gear-driven water pump with cast internal cross-over passages, an inlet-side thermostat and a pressurized high fill coolant reservoir. In this system, coolant is routed from the water pump, directly to the cylinder heads. When the heads are adequately cooled, any accumulated vapors are vented off, and the coolant then circulates through the engine block. After the coolant leaves the engine block, it returns to the water pump, moving through an internal passage into the radiator. There is a thermostat on the inlet side of the pump which meters the coolant temperature as it flows from the radiator and tries to enter the water pump casting. The water pump, which is driven by the camshaft, which is the center of the system, has cast internal passages which route coolant through the engine without sending it through the intake manifold, eliminating possible leaks. The gear-driven pump ensures coolant flow even if the drive belt breaks. The reverse-flow cooling system is advantageous because it reduces the overall cooling system pressure and basically eliminates pitting or disintegration of the water pump and seal. In addition, routing the coolant to the cylinder heads first promotes higher bore temperatures and less ring bore friction, increasing output and horsepower. Due to the increased temperature of the cylinder walls, which created higher oil temperatures, engines with reverse-flow cooling systems may be equipped with an engine oil cooler or use synthetic oil.
That would be the LT1 the only GM engine with a gear driven water pump to facilitate being able to continue to drive the car if the belt broke.
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I drove my jeep 3 months ago 4 miles with only a pair of panty hose wrapped around the crank and waterpump ;D
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How many idiots driving around today would think to do that ? most drivers today can't even change their own tire. Had a guy have his truck towed into the shop I was working at one day, noticed it was a flat tire, asked him if there was anything else wrong, he said "Nope, just the flat" I said why didn't you just put the spare on and save $70 bucks on a tow, Hes said" Didn't know I had a spare if I do I don't know where it is." At which time I walked to the back of the flat bed and pointed to the spare tire hanging under the bed of the truck. Some people just amaze me how they make it through life.
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Hehe. My g/f's mom locked herself out of her running car the other day. I went out with a coathanger and a pry bar. The coathanger was too flimsy, so I used her antenna. Some people just aren't very ingenuitive any more
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True...its funny and sad at the same time that not too many people know how to do much anymore. Its like a new breed of idiots.
But, a lot of people can't do simple repairs on cars because you really can't work on cars today. They are too complicated and emission based. You can't even change spark plugs on alot of 'em. Their designed so the owner would have to bring them to a dealer.
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You can't even change spark plugs on alot of 'em. Their designed so the owner would have to bring them to a dealer.
I thought changing the spark plugs on my mom's 03 Acura TL would be a pain being a coil on plug, transverse mounted engine and all. It was a pleasure. Didn't take that much more time than a plug change on my truck.
I really don't buy into the conspiracy theory that cars being engineered for more complexity to benefit the dealer service dept. I think the complexity is only increasing out of necessity.
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Strictly just my opinion, but the complexity is only necessary to meet stricter EPA and federal mandates. I think thats why carburetors are extinct on new production vehicles, not because they are not as "precise" as fuel injection, but that F.I. is better for tailpipe emissions and to meet the federal requirements on MPG. Not that good mileage is bad...but , I can have a 2bbl V8 that gets 20MPG all day.
And, whats up with having 4 or 5 catalytic converters on an exhaust system? You don't even need mufflers with that many obstructions.
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And, whats up with having 4 or 5 catalytic converters on an exhaust system?
Answer:
to meet stricter EPA and federal mandates
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lol...Yeah, I kinda figured that out, I just think its ridiculous. IMO.
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Hehe. My g/f's mom locked herself out of her running car the other day. I went out with a coathanger and a pry bar. The coathanger was too flimsy, so I used her antenna. Some people just aren't very ingenuitive any more
Ya, I would of thought of it, but really wouldnt want to bend a antenna. Unless you pryed the door to get to the lock switch...but thats why I have a lock out kit.
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I rolled down her power windows. It was the perfect day too, we got about 8in of snow. lol
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I drove my jeep 3 months ago 4 miles with only a pair of panty hose wrapped around the crank and waterpump ;D
I did that on my 61 econoline many years ago, my friends thought I was nuts when I told them what I did. It worked tho. I patched a tire on the same van with a hot glue gun and a sweet N low package. It held air long enough to get to town (25 miles), also used a popsicle stick to engauge the voltage regulator for the alternator so it would charge the battery. I ran it like that for months without any problems. Note: if you do this, make sure to remove the stick when the engine is turned off or you"ll have a dead battery.
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lol...I used a piece of rope to substitute for a radius arm bushing on the front end of my old '78 F150. Twin I Beams suck.
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Hehe. My g/f's mom locked herself out of her running car the other day. I went out with a coathanger and a pry bar. The coathanger was too flimsy, so I used her antenna. Some people just aren't very ingenuitive any more
Ya, I would of thought of it, but really wouldnt want to bend a antenna. Unless you pryed the door to get to the lock switch...but thats why I have a lock out kit.
LOL I locked my keys in my car one night at the bar, looked around and seen the antenna, perfect unscrewed it, unlocked the door and put the antenna back on and drove home..lol