Forget this please
I saw a gloss back jet boat out at El Cap one evening, tunnel hull with red or purple trim on the engine and everything else all black, running an MFI. It sounded real good. He was with a couple of other "heavy hitting" looking boats also. I know I've seen a pic of that gloss black boat on this forum but I haven't been able to find it since I first saw it. I'd love to pic that guys brain or crawl all over his boat, or both.... Since you are in El Cajon...
Big Inch Ford Lover
Thread jacking my own thread st That bitchin black boat pic, off of another forum.I saw a gloss back jet boat out at El Cap one evening, tunnel hull with red or purple trim on the engine and everything else all black, running an MFI. It sounded real good. He was with a couple of other "heavy hitting" looking boats also. I know I've seen a pic of that gloss black boat on this forum but I haven't been able to find it since I first saw it. I'd love to pic that guys brain or crawl all over his boat, or both.
Hey hot rod, m.f.i. is so simple once you grasp the idea. You have three bypasses for off-on throttle and response if you are going to cruise the boat and occassionly want to hammer down, if it is a drag boat and w.o.t. is all you are concerned about then thats different. Expanation in simplest terms. Those would be bypass valves and they do just that they bypass feul back to the tank in relation to the rpm and pressure delivered by the mechanical pump.( the only thing the pump feels rpm it is being turn and will deliver the feul to the injector BARREL VALVE which distributs the feul to each NOZZLE in the stacks. Which is regulated by the speed and preesure forced by the mechanical pump. Now comes the tune part,and its easier than people think. First of all you decide which feul you are going to run and make sure the nozzles are for that distribution. Then you call Crower or Steve Kinsler and ask for a base line to start. FOLLOW IT! they will give such things as spring pressure in the bypasses and shim thicknesses and a PILL to start.(pill being your'e jet size. Put that pill in the center of your'e dial a pill and go LIGHTLY up and down. Take the boat out see how it acts at idle, mid-range and w.o.t. then you play with each. I.E. Idles fat Take a shim out let more fuel back to tank. Mid, Boat surges and acts starved put a shim in hold more fuel. W.O.T. Boat gets to a certain rpm and NOSES-OVER Or stops pulling before you think it should (starving) Step up the pill, Boat LAYS DOWN AND BLUBBERS . back off on the pill. NOW COMES THE FUN PART. remember by going larger on the jet you are sending more feul back to the tank in which you are leaning the boat down. Smaller the jet the more the engine gets. YOU MUST ALWAYS remember it is a forced feul system. Once you grasp that idea and learn to tune it the M.F.I. can be extremely fun and more responsive than any carb boat I ever tuned. Lots of info I know but I had a UBFJ back when I raced. MThanks Sleeper CP
Next two pics up is a Alky/Nitro filter.
Third is the Back Pressure Valve.
Fourth is a Economiser Valve.
Fith is a High Flow Valve.
Hey hot rod, ALL good questions and extremily viable, Fire, true alcohol burn with zero color. FIX and what I did,add 1 pint marvel mystery oil to 20 gals alcohol burn orange and gives a dark smoke and will help injectors and pump and nozzles. Water YES alcohol attracts water big time but the previos mentioned helps that. I would go to a race and never drain or worry about that, But would drain feul system and injector the spray with ATF till next time out. NOW price go check a drum of race feul and a drum of alcohol. You can still do the injectors with feul and loose the water deal and tuning stays the same. Less maintainance with feul. Alcohol likes alot of compreesion and cylinder temp so for a lake boat I would stick with the gas and tune as iI stated. MExcellant replies! Thanks.
Picking my fuel. The boat is a lake boat, hopefully will haul some assh, so I'm considering fuel consumption but I don't want to cut myself too short worried about fuel consumption, so if I'm gaining ? a lot ? of HP by going to alcohol or E85 then that's what I'll go with. Does running alcohol or E85 "garuantee" more HP or? I have E85 near me and I can take some fuel jugs with me when I go to the water. The injection unit is now set up for alcohol but I don't know yet what I would have to change for my application.
But, alcohol and E85 is run a lot fatter than race gas and they will definately use a lot more fuel. When it gets to the point of going to the sandbar and having to turn around to go refuel that's not what I'm looking for. I'm also not looking to go to Martinez and running the thing all the way up to Walter's Camp without refueling either (a long way). I've been told that alcohol attracts water and evaporates quickly, I'm not sure if that's the best choice for a lake boat. I've been told that if there is a alcohol or E85 fire that there are no visible flames, I'm not too sure how much I like that idea either.
So that's why I'm "on the fence" about picking my fuel, I don't have enough info yet.
So it seems that's my next step is to figure out my plan further and decide on a fuel and stick with my plan. Then it seems a call to Kinsler is in order so we can figure out what I have and what I need.
I left the books out instead of repacking them up so I could read more on it and hopefully more will sink in. I'm stoked I got some great feedback on this thread. devil