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Old 08-21-2003, 03:38 PM   #1
d4d4d4d4
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Lightbulb Converting Boxer to diesel?

Is this at all possible? It would probably require lots of custom work, but I think a bio-diesel subaru would be pretty cool! Maybe the old 2.2T or the newer 2.5T would be able to handle the compression ratio 22:1. Any thoughts?

Did VW ever make diesel boxers?
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Old 08-22-2003, 09:35 AM   #2
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[Austin Powers voice] YEAH BABY!!
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Old 08-22-2003, 12:18 PM   #3
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Thoughts,

Gasoline engines do not tend to do well when converted to diesel. Just ask General Motors. Although I agree a turbo block would be a better candidate, that still does not address the larger bearings typically required in a diesel. Even a turbo engine only sees higher cylinder pressures occasionally (at WOT). The diesel sees them every cycle. However a proper diesel Subaru is supposed to be in the works. With any luck we'll see it in the upcoming 7-passenger.
VW did make a boxer diesel. I believe it was water cooled and part of the Wasserboxer line (both gas and diesel) which made it into the Vanagons. However, that engine is just lethargic beyond belief.
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Old 08-22-2003, 04:01 PM   #4
Jon [in CT]
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Default Re: Converting Boxer to diesel?

Quote:
Originally posted by d4d4d4d4
I think a bio-diesel subaru would be pretty cool!
It appears that someone in the UK has done this already and was busted for it:
http://www.guardian.co.uk/uk_news/st...807299,00.html


And maybe this Subaru diesel automatic wagon is still "for sale" in San Jose:
http://www.craigslist.org/sby/car/15163265.html

Last edited by Jon [in CT]; 08-22-2003 at 04:27 PM.
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Old 08-24-2003, 02:28 AM   #5
d4d4d4d4
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Thumbs up

It would be really cool if Subaru came out with a diesel boxer. I would buy one and convert it to a vegetable oil burning engine. Imagine a 3.6 L flat six diesel with AWD. That would be nice.
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Old 06-06-2004, 12:36 AM   #6
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lol rations on cooking oil
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Old 06-08-2004, 06:32 PM   #7
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Quote:
thoughts?
Yeah. The whole idea strikes me as strange when asked in a performance conversion forum. People here are not looking for a 12 sec 0-60 smoker. There are a multitue of places where this thread would get you a metal, along with deep discussion about the morality of the war. Not here though. Sell the Impreza and go for a euro green machine.

Mike McBride
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Old 07-25-2004, 12:01 PM   #8
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any old vw diesel will fit in any subaru engine bay. all are boxer style. vanagons with ej motors are around, so you could use a vw turbo diesel "old" motor in any new suby. biodiesel requires fuel to be heated so it's thin enough to be pumped to engine. or start vehicle on diesel then switch to "grassoline" to keep running. you can fill up at any mcdonalds free of charge. although you'll have to filter before refueling, it is free. some big city food chains actually pay to have it disposed of! so start your own biodiesel station, and make some cash while converting cars in your spare time. i'll stop by with my biocar when you're done.
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Old 08-01-2004, 07:35 PM   #9
CatchMyDrift
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I swear the goverment is going to make us pay to breath one day..... jerks.
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Old 08-01-2004, 08:01 PM   #10
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Quote:
Originally Posted by Jon [in CT]
It appears that someone in the UK has done this already and was busted for it:
http://www.guardian.co.uk/uk_news/st...807299,00.html


And maybe this Subaru diesel automatic wagon is still "for sale" in San Jose:
http://www.craigslist.org/sby/car/15163265.html

NAZI's.....

sounds like the US prohibition. I like how the cop says that you have to use TAXED gas.

AND, just to add my 2 pence... this is a conversion forum so it's fine where it is regardless if you're making more HP or not.
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Old 08-03-2004, 06:22 PM   #11
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hate to jack the thread but bio diesel has to be made in your garage or something...you have to add lye and alcohol to the cooking oil and kinda mix the oil and filter it from the glycerin solids in big tubs in order to burn it in your "diesel" engine im not exactly sure of all the details but i remember it takes more work then just stoppin by the mcdonalds..plus you'll have to fight groundskeeper willy and the oil recyclers for that used cooking oil!!! oh yeah a diesel subaru would be nice in a 6 cylinder version!!!
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Old 08-05-2004, 04:28 PM   #12
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Default biodiesel V/S SVO

You guys are getting the two confused. Straight vegetable oil (SVO) has to be filtered, de-watered and heated to reduce the viscosity. Biodiesel can be used straight though it is no good at < 20 deg F. so blends are used. It requires the alcohol/lye processing to make it.
Most VW diesels are inline 4's and would require a large bump in the hood at the least. The question I have is; Is it worth it? If you want a diesel, buy the VW. I own an '81 rabbit PU and a 2000 impreza. Best of both worlds.
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Old 08-05-2004, 04:37 PM   #13
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No VW boxer product is diesel. Never produced. The Vans that had the diesel option had the same engine as the Diesel rabbit/Jetta. 75hp. I have seen some conversions of TDI powerplants into Vanagons and Westies. For a diesel boxer, I would think the compression required to ihnite the fuel would be too great for the boxer engine design crankshaft to bear. No spark in Diesel remember, its ignited by compression alone.
A tdi Impreza or Legacy wagon would be very cool.
-Ob
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