[quote author=Dingleberry link=board=1;threadid=10508;start=msg95023#msg95023 date=1074982277]
I think it's cheaper, cleaner, more powerful and you get better range per tank.
[/quote]
Cheaper, depends on where you live. Propane is about 1.89 a gallon out here.
Cleaner, that depends on how you adjust it. Just like a carb. If you are very poorly out of adjustment you will still be spewing lots of gas..
Power, that is a wash generally. The higher octane is handy but you really do have to optimize a motor for propane. Advance the timing a lot. And increase compression as well. Also it is better to run a cooler spark plug than you normally run.
Range? Nope, typically you can see a bit of a loss in mileage. but when you are typically getting 12-14 mpg to begin with it is not that big of a deal.
The longevity of the motor is amazing with propane. Cruiser motors run forever. Add propane and they will last even longer. Oil never really gets dirty. Neither do valves.. Speaking of valves. Hardened valve seats are a very handy thing.
Propane is almost stupid easy. And yes it will run at any angle. Even more so than a good FI system. but when it fails you can fix it with a screwdriver typically. I love it for that one reason.
I assume you are going to use forklift tanks? Get three just in case.
As for size. Any carb be it gasoline or propane is just a simple mixer. HP largely depends on how much air/fuel you can get into the motor at any one point and time. With a small throat on the mixer you will never get that much flow. Think of sucking through a coffee straw (or mixed drink straw) compared to a McDonalds straw.. Big difference right? That is your limiting factor. You might want to look into the CFM and HP rating of that carb. I bet it is pretty small.
For refrence. I was running a 350 cfm carb on my cruiser when it was more stock. With the turbo I am now running a 460 cfm 4 barrel.. (The impco 425 mixer is designed to fit on top of a holley 4 barrel butterfly set)
The adapter is going to possibly be an issue. Anyone happen to know the stock 1 barrel pattern off the top of their head? is it close at least?
Before you try to instal the kit make sure that it will provide you with the flow you need. Choking off a cruiser motor means no HP...
Letting it breathe will amke for a happy cruiser motor
BTW, with propane/turbo, 38.5's, and 4.11's I pulled hills very well. Typically would not lose any speed. I can't wait to see what 5.13's and 40's will do.
I am betting that I will be able to burn the 40's....
(Yes this is Jason_M I had to reregister at home)