Turbo Ghost
Well-Known Member
Apparently, the head pressure isn't an issue as I haven't seen any comments from the ones who've directly connected the aux to the main about leakage. The head pressure is roughly 0.3psi so, not too much pressure. For your second query, I can't imagine even at full-throttle the aux fuel line wouldn't be able to keep up with demand. I don't know what size line the vent tube takes but, I would guess maybe 5/16" or so and that should flow plenty to keep up. Yes, I agree expansion when not running would push fuel back up into the aux tank but, the pressure would be same as head pressure unless the aux tank vent failed. THEN I think you would have a problem! Otherwise, I think everything will be fine. It's really all a moot point for me now as my plans for a gen 2 fell through and I decided to adult instead. I just ordered a 14x40 portable building to become my workshop so I can finally have a place to store and work on all my bikes instead of letting them sit in my carport rotting away neglected! I can't do projects that take more than a day as loose and open parts are exposed to the elements and I have racoons and other critters that like to steal small, shiny things! Once I can get my shop set-up and start restoring some bikes I'll sell some and hopefully before too long I'll join the gen 2 club!Here kicked my stupidity in .... should not try to play with the big boys.
Yes, got you.
Anyway, do we THINK or do we KNOW if the head pressure to the cap is an issue for a 2.5 gallon tank?
When the pressure increases, (when the fluid expands due to i.e. heat), it will push the gasoline back to the secondary tank I believe, unless the head pressure caused by the secondary is >threshold. (I'm mixing two different topics now ) and there is no movement in the system (not running).
But let me ask a different thing, back to the fuel line.
When the engine runs and the secondary tank cannot deliver the same amount of fuel per minute what the engine is consuming, would mean, the main tank gets emptier over time, but there would not be much pressure to the main cap, as the main tank is not full unless the engine is not running, right or wrong?
So the diameter of the fuel line could be something to consider. *twisting head*