Can anyone tell me what this is? Line attached goes to a block which is connected to the fuel pump. It appears maybe vacuum.
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VMax 4 800cc
mfb
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The old muscle sleds are cool. A turbo just makes them that much cooler! I was just a little felluh but I seem to recall a turbo vmax coming to the radar runs in Medway hosted by the East Branch Sno Rovers. I want to say it was Trask performance from waterville/Winslow Maine, but I could be wrong. No matter who owned it, I remember it running mid 130s in 1000'.
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Here is my lake racer 92 turbo VMax 4 before the throttles stuck wideopen and I destroyed it by hitting my neighbor's garage. That turbo is the much more powerful 199/250 unit. Broke six ribs and ended up in the hospital for 3 days.
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My 94 750 turboed and 95 800 non turbo Vmax4s.
The 94 had a handtooled leather seat.
The 95 has since been turboed.
The 94 had a handtooled leather seat.
The 95 has since been turboed.
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I checked through the fuel system. Found no shutoff or check valves. Attached hand drawing on what I have and found. Borken line coming from tank then tees to the electric fuel pump assembly, the same line continues and feeds one pump which feeds fuel block. coming from the electric pump line going to fuel block is broke as well. The other line coming out of the tank feeds the other pump which feeds the fuel block. Both vacuum lines from both pumps are connected to the crankcase. The only way to maybe get fuel in this state is from the one pump where the line is not broken. My thoughts, how about yours?
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You seem to be missing the return hose from the Bosch regulator/bypass back to the tank via the second stock fuel tank pickup hose. I believe that both stock pumps, and the electric pump, are connected to the single pickup hose.
Also, if the hose at the 4 hose distribution block is broken, none of the pumps can push fuel to the carbs. And there would be a massive fuel leak.
new drawing attached. Missed the bypass, sorry. There is no return line going back to the tank. both pickup tubes, one supplying elec fuel pump, bypass, and vacuum fuel pump. The other pickup line runs directly to the second fuel pump.
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Yes, that's the bypass. Where does it go?
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It won't work very well. The moment the electric pump starts, the bypass sends most of the fuel right back to the electric pump suction hose. This heats the fuel a lot and probably reduces the suction signal of the electric pump.
Yes, I didn't notice that earlier. Just run the bypass directly to the tank as stated.
I'm in the process if turboing my own 2000 XCR 800 triple. There is only one large suction line from tank to pulse pump. I plan to tie into that line and go directly to the pump, then return excess fuel back into top of tank. I drew a sketch of it yesterday.
That triple will be awesome once you get that finished. I see your location is listed at SE lower Mich. That's where I was born and raised. Little town called Newport. I did a lot of racing around the Dundee area back in the days. Did a lot of riding there Grayling, East Tawas areas. I moved out to CO 26years ago and still love it out here to this day.
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You must be close by Milan or Yipsy. I still have relatives out in Carlton area on South Carleton Rockwood road. Small world. When do you think you'll have your new sled up an running? On the turbo there is 2 vac lines connections. 1 is going to main vacuum (connected to where you can adjust turbo for boost) and the other line connects to the overflow of the carb. I am assuming where it connects on the turbo it may be for the waste gate? Is this correct?
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