Detroit diesel on SVO? - Topic Powered by Eve Community

Member

Posted

Thank you very much for the reply SUB. I had just about given up hope for a reply and hadn't checked recently.I thought the fuel passing through passage ways in the cylinder head and the unit injector/lines nestled under the valve cover, might make for a nice 'final' heat for SVO, on this engine design. Never occured to me that a 2-stroke might be an advantage also. Phil

Location: Ontario | Registered: 12 May 2006

Ignored post by VW cat posted

SUB

Member

Posted

Now I'm looking to tune up an old 2 53, hoping to find service info as all my detroit books are for 71 series- Any leads?

Location: Vancouver Island, Canada | Registered: 30 September 2001

Ignored post by SUB posted

buickanddeere

Member

Posted

Two stroke Detroits are ideal for burning "non diesel".
Each injector is an individual assembly, simple to access/replace and rebuilds are dirt cheap.
Old S series injectors are best used as paper weights,door stops or cores for rebuild. The N series are better and C are very good.
Use the N series trunk pistons for the most compression you can get.
Military cross head pistons are better but awful tough to find. Some doink somewhere decided a high compression piston in a DD military engine is secret classified info & materials. Thus the public shouldn't have them???
Those dopes should get a life and read what's openly available in Jane's books or Aviation Weekly.
On four valve natural aspirated two stroke diesel engines a C45 or C50 in a 53 series, a C70 in a 71 series or C100 in a 92 series are about tops for size. That is if they are set for full stroke.
Efficiency is better using an ever larger injector and limiting it's rack travel. The same amount of fuel is injected over a shorter period of time while the piston is closer to TDC.
A C70 injector works good in a 53 series with the rack travel reduced.
And yes a two stroke DD with just a blower and no turbo really is considered naturally aspirated.

Registered: 22 August 2007

Ignored post by buickanddeere posted

Member

Posted

I came across an ad recently listing a 353 Detroit aluminum engine. The owner said he wanted $1500 for it and it was a surplus military engine at one time. Are these a good engine, must be much lighter than a cast iron unit. Phil

Location: Ontario | Registered: 12 May 2006

Ignored post by VW cat posted

Skulptor

Member

Posted

Hey Folks,
Just moving this thread up to see if there is anyone else running a DD on grease? If so, what did you find as some of the "do's and don'ts"??
I have an 8V71 in a '77 GMC bus. My plans are a 200 gallon tank and appropriate valves and heaters as necessary. If you have a little time to write, I'd really appreciate any insight you may have on those.
I'm also centrifuging my oil. (or will be as soon as I get the oil. My CF is ready to run.)
But even with CF-ing the oil, I guess a heated fuel filter would be a good idea too. Any recommendations of which one to use? DD's push allot of fuel thru- so I am told.
Thanx in advance for any advice!!!
Getting going,

Chaz
Pix of my CF- http://s58.photobucket.com/alb...Skulptor/Centrifuge/
1973 GMC bus w/8V71 Detroit
Fuel oil furnace converted
Passive solar underground home at www.amstudio.us

Location: Batesville IN. | Registered: 15 September 2007

Ignored post by Skulptor posted

roadoiler

Member

Posted

I have a 1982 Olds Delta 88 with an aluminum block 353 out of an Army Gamagoat. My plans are to set it up to run on wvo.

Location: perry oh | Registered: 13 July 2007

Ignored post by roadoiler posted

Member

Posted

Thank you Skulptor and Roadoiler for keeping this topic alive. I'm trying to figure out how far 200 gallons of SVO would get a bus.

Roadoiler, I was curious about a 353 swap in a pick-up. The aluminum engine must be pretty light. Phil

Location: Ontario | Registered: 12 May 2006

Ignored post by VW cat posted

Sunshine Express

Member

Posted

buickanddeere - are you still out there?

just bought a 1974 transit bus with a 6V71 DD

are you running your DD on WVO or SVO?

if so, how's it going? any tips on conversion for me?

thanks

quote:
Originally posted by buickanddeere:
Two stroke Detroits are ideal for burning "non diesel".
Each injector is an individual assembly, simple to access/replace and rebuilds are dirt cheap.
Old S series injectors are best used as paper weights,door stops or cores for rebuild. The N series are better and C are very good.
Use the N series trunk pistons for the most compression you can get.
Military cross head pistons are better but awful tough to find. Some doink somewhere decided a high compression piston in a DD military engine is secret classified info & materials. Thus the public shouldn't have them???
Those dopes should get a life and read what's openly available in Jane's books or Aviation Weekly.
On four valve natural aspirated two stroke diesel engines a C45 or C50 in a 53 series, a C70 in a 71 series or C100 in a 92 series are about tops for size. That is if they are set for full stroke.
Efficiency is better using an ever larger injector and limiting it's rack travel. The same amount of fuel is injected over a shorter period of time while the piston is closer to TDC.
A C70 injector works good in a 53 series with the rack travel reduced.
And yes a two stroke DD with just a blower and no turbo really is considered naturally aspirated.

Location: Pendleton OR - for now | Registered: 24 March 2008

Ignored post by Sunshine Express posted

Sunshine Express

Member

Posted

wondering how far you got with this. just bought a 1974 transit bus with a 6V71 and deciding SVO/WVO -vs- BD100

any tips are welcome. -jwt

quote:
Originally posted by Skulptor:
Hey Folks,
Just moving this thread up to see if there is anyone else running a DD on grease? If so, what did you find as some of the "do's and don'ts"??
I have an 8V71 in a '77 GMC bus. My plans are a 200 gallon tank and appropriate valves and heaters as necessary. If you have a little time to write, I'd really appreciate any insight you may have on those.
I'm also centrifuging my oil. (or will be as soon as I get the oil. My CF is ready to run.)
But even with CF-ing the oil, I guess a heated fuel filter would be a good idea too. Any recommendations of which one to use? DD's push allot of fuel thru- so I am told.
Thanx in advance for any advice!!!
Getting going,

Location: Pendleton OR - for now | Registered: 24 March 2008

Ignored post by Sunshine Express posted

8V71

Member

Posted

The military 353 is aluminum, but was not known for reliability, since they took a shortcut in producing it for the Gamma Goat. Being amphibious, they wanted a lighter engine, hence the aluminum. Where they fell short was in not beefing up the castings in certain areas to account for aluminum's weaker strength. They simply poured aluminum where steel used to be.

Registered: 13 April 2008

Ignored post by 8V71 posted

8V71

Member

Posted

I would like to get in touch with anyone that has actually used hot oil in the 8V71. It does look promising, what with the engine heated oil right by the injectors, plus the 2 cycle, where less cooling happens between bangs, although I'm not sure that makes a big difference, being as we're talking about milliseconds. If you've done the conversion/installation, I'd be interested to know what valves were used. Thanks.

Registered: 13 April 2008

Ignored post by 8V71 posted

Member

Posted

I found a rare reference to running SVO in a 2-stroke Detroit Diesel. Phil
http://www.thedieselpageforums...d.php?t=27946&page=3

Location: Ontario | Registered: 12 May 2006

Ignored post by VW cat posted