|
|
|
|
|
#1
11-08-2002, 11:30 AM
|
||||
|
||||
|
She don't lie, propane
Sorry for the weak Eric Clapton reference but has anyone ever tried propane fumigation on a 300D turbo motor? I'd like a bit more go for the wagon hybrid.
__________________
Brian Roth, Pollock Pines, CA 1981 300TD turbo diesel on 1984 Nissan 4x4 chassis. A runner. 1973 Porsche 914 with Ford 2.3 turbo. Not a runner yet. 
|
|
#2
11-08-2002, 11:52 AM
|
|||
|
|||
|
No, but can you tell me more about the swap into the Nissan? How did you mate the engine with the rest of the drivetrain? Since there aren't any adapters on the market that I know of, the only way I can think of doing this would be to run a driveshaft from the MB tranny to a divorced transfer case - although I don't know whether a Nissan is big enough for such a setup.
Greg '84 300D, 168k
|
|
#3
11-08-2002, 12:52 PM
|
|||
|
|||
|
DO IT!
Bully Dog propane kit
OR http://www.diesel************************/flash.html Did you also read Ridge's post regarding his intercooler installation project? Have you considered replacing the automatic with a manual transmission? Cool wagon!
|
|
#4
11-08-2002, 03:18 PM
|
||||
|
||||
|
I did use a divorced transfer case. The Nissan 720, made from 1980 to 1986 had a divorced transfer case. There is a thread which includes more info and a picture a few days old called "300TD 4x4 hybrid" or something like that. I do have a file I can send you with more info. Drop me a note to broth@sanjuan.edu and I'll send it to you.
I have been reading about Ridge's intercooler. That is something I have considered. I still want to know about adding propane to a 617 turbo motor though. I've heard that propane can give you 20-30% more bhp. I'll check out those sites.
__________________
Brian Roth, Pollock Pines, CA 1981 300TD turbo diesel on 1984 Nissan 4x4 chassis. A runner. 1973 Porsche 914 with Ford 2.3 turbo. Not a runner yet.
|
|
#5
11-08-2002, 07:55 PM
|
|||
|
|||
|
Don't know if anyone has successfully done propane fumigation on a 617, but in my opinion it's not a good idea.
Most of the pickup trucks I've heard of this being done on are low compression (16:1) direct injection engines, notoriously low on horsepower to start with. On the 617, at 21:1, I'd be concerned about premature ignition ("spark" knock) from the propane igniting before TDC as a result of the prechamber design. If you get any, it will kill the engine pronto. I suspect the relatively small holes in the prechamber cause higher compression faster in the main combustion chamber, resulting in pressures high enough to ignite propane (or ether) long before injection. If you have ever tried to use ether to help start a reluctant MB you will know what I mean -- fires so early it stalls the starter motor trying to run the engine backwards. If you REALLY have to have more power, get an 87 300TD. Peter
__________________
1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
|
|
#6
11-12-2002, 01:29 PM
|
||||
|
||||
|
What you say is discouraging but it makes sense. However, I still want to pursue the matter and find out if anyone has tried propane on an engine with similar combustion pressure even if the compression ratio is less. I also heard over the weekend that Nitrous Oxide is being used to boost diesel performance while lowering combustion temperatures at the same time.
__________________
Brian Roth, Pollock Pines, CA 1981 300TD turbo diesel on 1984 Nissan 4x4 chassis. A runner. 1973 Porsche 914 with Ford 2.3 turbo. Not a runner yet.
|
|
#7
11-12-2002, 08:55 PM
|
|||
|
|||
|
Yeah, and I hear that the drag boys get 7000 ph out of a 450 ci Chrysler Hemi retread, too! (this is theoretically impossible, by the way, so say nothing of physically impossible. It only takes about 450-500 hp to drive a 2000 lb vehicle to 300 mph in a quarter mile -- after all, a P47 Thunderbolt has 2100 hp, and does 0-70 in about 300 yards......and weighs 50,000 lbs!)
Seriously, Nitrous won't help a diesel much, you already have more than enough oxygen if you don't overfuel. Certainly, it WON"T lower combustion temp, quite the opposite -- only water will do that, and that gets scary if you use too much! All the propane fumigation stuff I've seen is for direct injeciton diesels, not prechamber ones. I think the prechamber will cause more trouble than the compression ratio. Peter
__________________
1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
|
|
#8
11-13-2002, 01:49 PM
|
|||
|
|||
|
Yes it is possible in fact I am working on a system for my 300D now. I have a dual stage liquid feed system with an Impco "j" vaporizer on my Powerstroke now. It adds approximately 85-100 RWHP depending on the needle valve settings and amount of fuel I have programmed to inject. As stated above, the Powerstroke is a direct injected diesel engine though. There are a few guys with the earlier IDI engines that are running LPG, but they are only getting around 40-60 extra HP.
We also have a single stage nitrous and propane system on my buddies 2000 F250 with PSD that runs 5.2 second 0-60 MPH (6400 lb truck). Kieth Long from Diesel Performance Products lives down the street from my shop so I will talk to him about a system that would work on our engines. 
|
 |
| Bookmarks |
|
|
Linear Mode
