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Old 02-23-2006, 11:39 AM
53LEDSLED's Avatar
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converting gas engine to diesel

i was wondering if you can convert a gas engine to a diesel engine.

i was thinking keeping all the block assembly (pistons, rods, etc etc) and change everything from the heads up.

the reason i ask is because gas will eventually run out, and diesel can always be grown. well when we run out of gas, we are going to have a lot of gas powered vehicles that don't have any use.

what do you guys think?
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Old 02-23-2006, 12:00 PM
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GM tried making a diesel out of a gas 350 Olds V8 and it didn't work, the engines didn't last very long due to the high compression.
Ethanol and hydrogen can be made and run in a gas engine.
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Old 02-23-2006, 12:01 PM
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Not practical, diesel engines are compression ignition and as such have a very high compression ratio. Standard gas engine pistons and rods would not stand up to the higher compression.

Vince
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Old 02-23-2006, 12:12 PM
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richard stewart 3rd

ledsled,
first off you will be far into your dirt nap before this planet runs out of oil. May
I suggest you goggle around & read about Diesels, also GM had converts of sorts
& every car I saw, that had been equipped with this converted diesel engine when new, had been changed back to a gas engine, mostly 403 olds. rich.
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Old 02-23-2006, 03:01 PM
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[QUOTE=richard stewart 3rd]ledsled,
first off you will be far into your dirt nap before this planet runs out of oil. QUOTE]

No kidding, if you believe all the tree huggers that is real near. Fact is will not run out of fossil fuels in any of our lifetimes.

Vince
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Old 02-23-2006, 05:15 PM
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[QUOTE=302/Z28]
Quote:
Originally Posted by richard stewart 3rd
ledsled,
first off you will be far into your dirt nap before this planet runs out of oil. QUOTE]

No kidding, if you believe all the tree huggers that is real near. Fact is will not run out of fossil fuels in any of our lifetimes.

Vince
the way I belive, we can't ever, simply because of what fossil oil is made of, trees, old trees, millions of years old, and they turn to fossil oil, lots of oil, I'v heard the oil now is from the jurrasics, and the tree's are still rotting.
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Old 02-23-2006, 05:50 PM
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The gasoline engine block are to thin to convert to diesel. Compression ratio on a diesel runs from 14 to 1 up to 24 to 1. Cylinder walls not heavy enough to hold that compression. Water jackets are not large enough either. If you really want a diesel buy one.
Dave
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Old 02-23-2006, 05:57 PM
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dirt nap, now that a new one, i haven;t heard
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Old 02-23-2006, 06:06 PM
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Also dont forget that most all diesel engines out there are direct injection. Something only a few gas engines are beginning to have now. You'd also have to come up with some sort of high pressure injection pump or add another rocker arm and cam lobe for each cylinder and find a place to install an injector. It's not worth the work and money it would take to even attempt to put one together. What size diesel engine are you looking for? VW has 1.9 and 2.0L 4 cyls as well as a V10 diesel, Mercedes had a 5 cyl diesel and of course there are the 5.9, 6.0 and 6.6L diesels the Big Three put in their heavy duty pickups. I'm sure you can probably find one that would fit your needs.
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Old 02-23-2006, 06:09 PM
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I for one don't think we'll ever run out of gas, and I do mean never, ever.
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Old 02-23-2006, 06:14 PM
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We may never run out of fossil fuels but it will eventually be priced high enough that us average working joes wont be able to afford to use enough of it to commute with. They arent good for us or the environment either. If you've been to a major urban area like Los Angeles (or any number of other large cities) any time in probably the last 40 years you'll know what I mean.
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Old 02-23-2006, 06:18 PM
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Hey,if your really worried about it,running out of petroleum,that is,a gas engine can be made to run on wood,seriously ,ther was an article in an old MOTHER EARTH NEWS magazine where they had a firebox setup in the back of a pickup truck that heated wood,with a wood fire,until it released it's gas,and then piped the gaseous fuel into the carb,and it actually worked!

Don't know what it would do the quarter mile in tho.

Just throwing that out there for fun guys,but really,google mother earth news,you'll see.
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Old 02-23-2006, 08:01 PM
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Quote:
Originally Posted by FASTCHEVY
GM tried making a diesel out of a gas 350 Olds V8 and it didn't work, the engines didn't last very long due to the high compression.
Ethanol and hydrogen can be made and run in a gas engine.
Actually, the olds diesel is not a converted gas. The block, pistons, rods, crank, and many other parts are complete clean slate designs. They took existing architecture and they look identical, but the walls are cast thicker, the decks thicker, and the main webbing is very beefy. But even with all of those upgrades, it was still a pretty poopy engine. The main weakness is pretty easy to overcome, though. A good set of ARP 5/8" head studs solves the head gasket issues, but its still a wheezer.

I guess my point is, even if you take a gasoline design and beef it up to the hilt like Olds did, it still isn't do-able. So taking a plain gasoline engine and converting it just isn't possible.

Now, on the other hand... Take an olds DX roller cam diesel, bore it 1/4" over and use a forged big block olds crank with turned down counterweights and you have yourself a darn near indestructible big-inch gasoline small block
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