glad to hear it worked out for you maybe you just need to open it up more on the intake and exhaust side.

 

I am running a 5 inch intake and a 2-1/2" exhaust w/ a seethrough muffler. In a few weeks it will be a 3" exhaust running to 5" stacks. So the air will enter clean and cool into the 5" chrome intake and be blown out two 5" chrome stacks as hot, black, foreign-car-chokin' smoke.

 

keep us posted.

 

What ever you think.
But don't bet the farm on it.

 

I hope that was sarcasm...

 

I work with propane and know that if you are pushing too much propane without enough air it will soot up. Have a buddy has pi on an 88 dodge, gained 3 mpg, will out pull my 94 xlt turbo...for now.

 

It was. Or wild, impossible hope.... (snicker)

 

OK, RP's humor aside, I gotta tell ya, PI looks pretty interesting. I could pick up (pardon the pun) some torque where and when I need it, increase the fuel mileage (not a bad idea in a daily driver), and accomplish all this without blowing the bottom end out of a 20-year old quarter-million-mile truck. Oh, yeah. And the total cost for this project, using all brand new stuff (PI components, headers, dual balanced exhaust system) is well under $1K. I'm kinda liking this idea.

If you're looking for a good overview of system function, design and operation, go here: www.pacificwi-fi.com/htm_booklets/ford/. He also includes a 'shopping list', as well as instrctions on how to figure just how much propane is needed. No black smoke. It's definitely a cool website. Well worth the read.

 

I read the website article and it said that "nearly no power increase is felt at full throttle on a NA diesel w/ propane".
Maybe the writer tested it on a chevy diesel because it sure as heck made my truck scoot faster at full throttle. My 0-60 time went from about 12.5 seconds to 9 seconds after 4 tries. A 2002 dodge with a 4" exhuast and 90 horse chip does 0-60 in 9 seconds shifting through five gears.

got my pyrometer on yesterday and even though the 'pane makes it blow black it actually lowered the egts by 100 degrees with it turned on. I took the engine up to 2800 rpms before I shifted to see how hot it would get and it never got over 1100.

Anyone looking for a pyrometer should get on summitracing.com, they have a Autometer Ultralite pyrometer kit for 119.00 and i had it shipped in three days for free.

Dave, that was sarcasm if you were questioning the smiley faces.

 

Singletree-
I didnt think dodge put the cummins in their truck until 89. I could be wrong though.

 

Dieseldan, how big are the holes you have in your tube?

From what I gathered looking at the chart on that website you should have a little less than 1/8" orfice at 5.5 PSI for a 20% increase in power.

So if you drilled about 6 1/16" holes in the tube and lowered the PSI to about 2 you should get better dispersion of the propane in the air stream.

If you are blowing that much smoke, you are not getting the most power available out of the fuel because the combustion temps are to low.

As far as the previous comments, like I said think what you want, but don't bet the farm.

I hear that kind of stuff out of the Dodge Boys every day. Funny thing though, when we meet up out on the highway that all goes away.
Only 6 more months of warranty on my engine, then we will really see what it what.
After 40 years around diesels I have a few ideas, I'll have to see if they work like I think they will. So far my mods have been external things to help it out and it does OK with them.

 

The pane's lookin perty good to me right now... Ill see.

Dan, you would outrun a factory turbo. They were only rated at 5 hp more than a NA.
Dave's isnt factory though... hes is remanned, so its an ATS w/ a 3" downpipe, not the 2.25" factory size straw-for-exhaust. Anyways, even if you were kidding, you actually could beat some turbos IMO.

ISSPRO's are lifetime full-warrantied. Mine was $92, but you did get free express shipping... I got paid-in-full UPS ground...

 

Propane shouldn't hurt these engines in theory but what happens if a high miler gets any kind of buildup of propane in the bottom end? Isn't there a good chance of it going the same way as some industrial LPG powered engines I have seen and heard of? You know, the ones where the oil pan either grows a few inches or explodes due to explosions. Although, I have thought of toying with it myself still.

 

It doesnt feed as much propape as the lpg engines do, so the risk is lower. I also doubt that there would be an internal combustion in the oil tank. all the parts are oiled, so there is nothing to ignite it. The only thing that could set it off would be the pressure of the oil pump. this would still not be enough.

You could never build up enough pressure to swell the oil tank. There are too many places for it to leak out, primarily the dipstick hole. it would easily blow the dipstick out of the tube loooong before any significant pressure was achieved.

 

Just checkin' because I know it happens on LPG engines sometimes.