Anyone know anything about propane injection? - Page 2 - PeachParts Mercedes-Benz Forum

pawoSD · #16 01-19-2007, 01:31 PM

Quote:

Originally Posted by probear

I had propane on my truck until I changed injectors and really bumped the fuel delivery up. First things first:
(1) your fuel economy will be the same if you consider the fuel value of the propane
(2) you will have more power and it will burn cleaner than adding more #2 (read, lots less smoke)
(3) you need to make sure that you do not deliver too much propane
(4) it really works better on an engine with turbo/supercharged intake.
(5) on my truck, I went through one 20lb tank every fill up, which was 500 miles. My truck held 38 gallons of #2.

All things considered, it is probably one of the cheapest horsepower to cost mods out there. The PS200 system works off of manifold pressure. On the PSD, the usual range of manifold pressure is from slightly negative to 18 PSI. The PS2000 was set (this can be changed) to start coming on at about 4lbs positive boost. At idle and slow speeds, no propane but as you increased throttle, it would gradually increase.
On my truck, it gained about a second and a half in the quarter mile.

Oh, I have a PS2000 for sale.

That equals 13.15 mpg... PLUS about $18-20 a tank for the propane....not very efficient......

kafer65 · #17 01-19-2007, 01:35 PM

My understanding is that you could run both Propane and NOS. Don't forget that the injected propane is colder than the post turbo intake charge so it has an intercooler effect as well. You could inject propane until the intake couldn't accept any more additional air and then stage in the nitrous for the extra oxygen content to use more propane.

theturtle · #18 01-19-2007, 01:48 PM

+1
the propane adds more fuel, the NOS adds more oxygen, an engine needs both to run. Engines that are turbo'd have a greater ability to burn more fuel as they already are running leaner. With a few ajustments to the turbo the added propane would be used more effectivly.

also will the ps2000 work on a 300cd???? (1983)

probear · #19 01-19-2007, 03:17 PM

Quote:

Originally Posted by pawoSD

That equals 13.15 mpg... PLUS about $18-20 a tank for the propane....not very efficient......

Yeah, I went back and rechecked my actual numbers and they are as follows:

Originally 16 MPG for 35 gals - 560 Miles
With propane 18 MPG for 35 gals - 630 Miles
When I wrote the attached article, the economy was break even but more power was available.
It was written several years ago. You can substitute your cost of fuel to see an updated comparison.

BTW, the truck is a 99 F-350 PSD CC Dually. It weighs 9000 lbs. Normally, it should get 18+ MPG.

#20 01-20-2007, 02:40 AM

Those powerjokes have extra air supplied by the turbo to burn the propane, a 79CD does not.

truckinik · #21 01-20-2007, 04:36 AM

Hey,

What's wrong with the Powerstroke?
I've been using them forever,and they blow everything else out of the water.They're fun,reliable,and ballsy.
ok,back to subject:Your saying that unless I've got a turbo,or some other way to force feed oxygen into my engine,The propane won't be as effective?
OK,I got it.
Got another question for you all,that's now sort of related to all this.
If I could just convert my car to a turbo,Why should I use a stock one,and not a huge turbo from something else?
From a volvo,or saab or something w/some real boost,like a good Banks aftermarket job?
Perhaps,a turbo from a Powerstroke,some head,and valve work,and a custom cam,and some pop-up pistons,and bore it .030 over,a high volume oil pump,and have the injection pump modified,and injectors from something much more capable.This and Propane/Nitrous systems.Bigger fuel lines...etc.
Then I'll do an exhaust.Custom header(s),and a serious 2.5" exhaust w/Flowmaster.If I do all that,I can just do up a tranny,and rear end from like a 126 car or something.
Think I can get 300+h.p. out of this little five cylinder diesel??
Am I out of my mind?

Possibly dilluted?

Or is any of what I just posted possible.

??
I know of course,that the crank,block,and rods won't last long.

Perhaps I can just have some fun with it a while,and deal with it when it blows through the hood,and firewall in a fantastic array of parts,flames,and fluids.:fork_off: Maybe,just maybe,the grand finalle will be caught on video tape....

What do ya' think??

captainmonk · #22 01-20-2007, 04:53 AM

caterpillar had a nice lil engine in the 70's 3160 i believe 160 hp
then they changed it to a 3208 kept up the hp good engines right up to 375 hp at 425 no one could keep one running
Now Cat doesnt make a good small hp engine imagine that

#23 01-20-2007, 04:57 AM

Quote:

Originally Posted by truckinik

Hey,
What's wrong with the Powerstroke?

If I could just convert my car to a turbo,Why should I use a stock one,and not a huge turbo from something else?
From a volvo,or saab or something w/some real boost?
Perhaps,a turbo from a Powerstroke,some head,and valve work,and a custom cam,and some pop-up pistons,and bore it .030 over,a high volume oil pump,and have the injection pump modified,and injectors from something much more capable.
Can I get 300 hp. out of this little five cyl.diesel?
Then I'll do an exhaust.Custom header(s),and a serious 2.5" exhaust w/Flowmaster.If I do all that,I can just do up a tranny,and rear end from like a 126 car or something.
Am I out of my mind?Possibly dilluted?Or is any of what I just posted possible.
I know of course,that the crank,and rods won't last long,but I can just have some fun with it a while,and deal with it when it blows through the hood,and firewall in a fantastic array of parts and flames,and fluids.Maybe,just maybe,the grand finalle will be caught on video tape....
What do ya' think??

First. I work with a fleet that has 30 2000 F-450 powersmokes. I've been burned by them many times. Never ending glowplug relays, alternators have been replaced at least once on all of them, royal PITA to start when it's below 25* outside, glowplugs take 3 hours to change, replaced the engine wiring harness under warranty on 4 of them after they melted, one has a flat cam lobe with only 60k miles, 2 clutch slave cylinders, 1 clutch, 2 automatic transmissions, air filters barely last 4000miles before getting plugged with grime, BIG difference in performance between them all, no torque off the line, and the turbo takes forever to spool.

Second. head, valve work, custom cam, custom pistons, boring, high volume oil pump, injectors, and header are all unnecessary. Your nonturbo engine cant even handle the stress from adding a stock turbo setup without melting the pistons. Stock turbo internals can already handle 300hp+, the changing cam profile will not be worth the $$$ for minimal gains, custom pistons don't exist unless you build them from scratch, and injectors are not a restriction on these engines. You can spend $10,000 to get 300hp from your engine and your stock 560sec will still win every race.

If you are serious about performance look no further than the SuperTurbo forum here: http://schumanautomotive.com/forums

Also, many members here would have someone drawn and quartered if they posted a video like what you described.

truckinik · #24 01-20-2007, 05:21 AM

Yes,I suppose they would be a bit upset to watch a vid like that.I've got a connection for any machine work necessary to basically do whatever I could conjur up.They can do pistons,even a crank,and rods as well as the small components,like rings,valves etc.if I so desire.This guy does a lot of work for NASA and the NAVY for subs etc.He can spec.and tool nearly anything and he owes me anyways.I'd like to do it,and then put the whole set up in my little 123 300cd coupe.Doing all of that,and still using MBZ components along the way,even the purists wouldn't have anything bad to say about it. I buit a HotRod 41' Willy's years ago.I built it with a chevy block/heads,and crank.This guy set me up with Ford pistons,rods,and rings,as well as an assortment of other parts.This was buit special for compression and other reasons.I put a 12-71 blower on top,and fuel injection.I topped out at 1500h.p. at the rear wheels on the chassis dyno,and torque ratings were through the roof.Anyways,I can make it happen,and would be a really fun project.The engine in that car has I don't know how many miles on it today,but the car is in my hometown and the guy is all over town with it all summer.I did that back in 1999 and sold the car in 2001 for a g$$d amount of money.If that has held together,why shouldn't this if it's built and engineered right?