eke_zetec_RWD Posted May 22, 2008 Share Posted May 22, 2008 i cant see why it wont once the air lock has gone which will happen super fast. Quote Link to comment Share on other sites More sharing options...
sentra Posted May 22, 2008 Share Posted May 22, 2008 some cars now have pump & reg in tank yo Quote Link to comment Share on other sites More sharing options...
peteretep Posted May 22, 2008 Share Posted May 22, 2008 a vee motor would have the same setup? Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 22, 2008 Author Share Posted May 22, 2008 wot i mean is will the regulator being tee'd into the pressure feed before the rail but after the pump be ok, rather than after the rail. being a hydrolic system pressure shud be the same every where between the pump and regulator?? Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 22, 2008 Author Share Posted May 22, 2008 some cars now have pump & reg in tank yo yea spose thats the same as what im meaning. Quote Link to comment Share on other sites More sharing options...
fuel Posted May 22, 2008 Share Posted May 22, 2008 On my V6 engine it's just a big loop it's like: ....|...|...|... |=========|-------- from pump/filter | | |=========|-0--------- to fuel return ``|``|``|`` where the 0 is the fuel reg, Quote Link to comment Share on other sites More sharing options...
Spencer Posted May 22, 2008 Share Posted May 22, 2008 ^ hard thats the norm there phill I think you'll have problems with that setup Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 22, 2008 Author Share Posted May 22, 2008 yup yea its not the normal set up, but i cant see why it wont work lol. just will save a lot of fucking around. mite just try it. wheres those super confusing brainy cunts that knw bout phisics ect when you need em. Quote Link to comment Share on other sites More sharing options...
Spencer Posted May 22, 2008 Share Posted May 22, 2008 you'll be running batch injection right one driver per bank? I can just see you having massive fluctuation problems when all injectors fire at once at high duty cycles without a constant flow in the rail. People have this problem with decent injectors on normal setups Quote Link to comment Share on other sites More sharing options...
Testament Posted May 22, 2008 Share Posted May 22, 2008 it depends on the size of the pipe/hose and injectors. I wouldn't think its that great an idea though. you are more likely to get heat soak into the fuel with that setup as there is not a constant flow in the fuel rail. Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 22, 2008 Author Share Posted May 22, 2008 split bank fireing and 2 pulses per cycle. -8 fuel hose. heat soak yea god point. hmmm ok maby il just do it normal lol Quote Link to comment Share on other sites More sharing options...
fishtailfred Posted May 22, 2008 Share Posted May 22, 2008 Yeah, the fuel will boil away at a stop, and overheat while running too (recircing the same heated fuel repeatedly) Even better than suggested is putting a Y before and after so the pump feeds one Y that feeds both rails at one end and they exit into another Y which goes to the reg and then back to the tank. Fred. Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 23, 2008 Author Share Posted May 23, 2008 yup thats what i will do Quote Link to comment Share on other sites More sharing options...
Guest vvega Posted May 24, 2008 Share Posted May 24, 2008 parallel fuel curcuits are stupid...with the injector pulsing you can end up with some stupid eddy currents fuel delivery issues Quote Link to comment Share on other sites More sharing options...
forced Posted May 24, 2008 Share Posted May 24, 2008 parallel fuel curcuits are stupid...with the injector pulsing you can end up with some stupid eddy currents fuel delivery issues Yeah? Not on my car. Quote Link to comment Share on other sites More sharing options...
Testament Posted May 25, 2008 Share Posted May 25, 2008 eddy currents? fuel is not really magnetic afaik? Quote Link to comment Share on other sites More sharing options...
eke_zetec_RWD Posted May 25, 2008 Author Share Posted May 25, 2008 wouldnt the pulses be at such a high frequency that they couldnt even be measured and there fore wont matter a fuck? one pulse per revoultion. thats fast Quote Link to comment Share on other sites More sharing options...
QCADTA Posted May 25, 2008 Share Posted May 25, 2008 eddy currents? fuel is not really magnetic afaik? Yeah dont know howd youd get that, thought eddy currents were induced in iron from the magnetic field setup from an ac voltage/current. Quote Link to comment Share on other sites More sharing options...
forced Posted May 25, 2008 Share Posted May 25, 2008 If you want 2 fuel rails, you really need a reg at the end of each one, teed together. Your pic , the fuel will get hot as it's not circulating, best case it might keep stalling, worst case it might lean out and detonate and be really hard to tune. Hot fuel is less dense so leaner AFR. Quote Link to comment Share on other sites More sharing options...
fishtailfred Posted May 27, 2008 Share Posted May 27, 2008 wouldnt the pulses be at such a high frequency that they couldnt even be measured and there fore wont matter a fuck? one pulse per revoultion. thats fast Fuel pressure variation is an issue, but I would say no more on a parallel setup than a normal inline one. OEMs install fuel pressure dampers to smooth these out (like a shock in your suspension or capacitor in a circuit). If your setup has one use it, if you can retro fit so that there is one on each rail, all the better. In fairness to vvvvvv I understand eddy current to mean in flow of water as well as electricity too. I don't think it's a real issue specific to parallel feeds though. Fred. Quote Link to comment Share on other sites More sharing options...
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