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  1. ktbundy

    Propane Mixer Requirements

    The fuel in question for me is LPG, and yes I do have a large intercooler up front. I am going to be using two model E's with two Impco 225 mixers. Pretty much everything under the mixers has to be custom, so I have my work cut out for me. Are you the same Hemi from turboford.org? If so I have...
  2. ktbundy

    Propane Mixer Requirements

    Franz are you suggesting either one 425 or two 225's? I was a little leary of one 425 at 350+hp. Can't say that I have ever seem anyone blow through a 225, but that's an interesting idea. Being as though I have access to lots of Impco parts(but very little others)I plan to make this a budget...
  3. ktbundy

    Propane Mixer Requirements

    I live in Canada, about as far away as you could get. I have a wack of Impco parts, but I seem to be caught in between one mixer or two. Tom
  4. ktbundy

    Propane Mixer Requirements

    I am currently building a turbocharged Ford 2.3 engine for racing. I'm hoping to manage 350-400hp and plan on using my readily available Impco parts. My dilemma is that I seem to be on the borderline of using one 425 mixer. Should I just fabricate my intake to accept two mixers? Or is it...
  5. ktbundy

    propane requirements for a turbo big block

    I have studied the Impco catalogs for info on 425 mixers and found that they will flow around 460cfm and are good to about 300hp. My question is, on a turbocharged big block V8 capable of 700+hp would you require more than 2 of these mixers to adequately fuel this engine? I'm thinking along the...
  6. ktbundy

    PROPANE COMPRESSION LIMITS

    I think I understand your point about different quench heights for different fuels. Mine was based more on gasoline. As far as the motor goes, it is built with hardened seat inserts, stainless valves and forged pistons. This would be a vapor set-up utilizing 2 impco mixers on top of a tunnel ram...
  7. ktbundy

    PROPANE COMPRESSION LIMITS

    Is propane capable of supporting an engine with 12.5 to 1? The piston quench is near perfect at .045. The camshaft has a fairly large overlap also. I have seen 11.5 to 1 used, but I am wondering if this is pushing it a bit too far. Thanks in advance.
  8. ktbundy

    intake design for turbo/propane

    I forgot to mention the reason that I was looking at using a carb base was due to the limited throttle body size on the manifold.
  9. ktbundy

    intake design for turbo/propane

    Will an intake designed for fuel injection function well on a propane fueled turbocharged engine? Being a gas I know there won't be any puddling, but these manifolds are designed for air travel while the fuel is injected right into the cylinder. I believe propane likes longer runners, so I am...
  10. ktbundy

    propane for high performance

    I think I may have come up with a solution to my hood clearance problems, but thought I would run it by here first. I have mocked up a custom plenum that positions the mixers off to the side. I have one mixer/vaporizor combo hanging off the drivers side, and the other on the passenger. I removed...
  11. ktbundy

    propane for high performance

    I have run into a bit of a stumbling block with regards to my intake height and the mixers. Doing a quick measurement, I will not only need to cut a hole in the hood, but the mixers will need just over 8" of clearance above the hood. I don't know if I can put a scoop on this car that will...
  12. ktbundy

    propane for high performance

    I guess the next obvious question would be, does this type of application need a closed loop system? Or will this function properly without it? Most of the older cars and trucks that I have seen at the wreckers just run the fuel lock/vaporizer/mixer set-up. Also I looked at that cam website from...
  13. ktbundy

    propane for high performance

    Thanks for your reply Franz. Ironically enough, it was your information on the web that led me here. After reading your information on engine build-ups, I felt I was on the right track. I forgot to mention that I'll be running a 284/484 camshaft. Not too radical, but enough to wake the motor up...
  14. ktbundy

    propane for high performance

    I'm about to convert my car over to propane using standard Impco parts. I have a 360 Mopar engine that will be running 11.5 to 1 compression. The heads have stainless valves, bronze guides and hardened seats. Everything internally is pretty much new, as is the machining. I have chosen a Weiand...

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