fuel tech questions
02-18-2003
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fuel tech questions
ok So I have a couple of questions. What does the returneless fuel system do to make it so hard to turbo the civic? Can you adjust fuel ratios with a piggy back fuel system? like greddy e-manage or s-afc etc etc. If you can then you could run larger injectors in the civic correct? Then why are companies having trouble turboing the civic? Just some questions I am gathering knowledge of the 2k1 civic my best friend owns one and we will be attempting the kit. The mechanical part putting the kit on doesn't scare me. However the ecu and proper fuel does. Any knowledge or where to go read about how it works would be great.
02-18-2003
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Rep Power: 0 It's hard because you don't have that extra fuel on hand when you need it for something like a turbo. That return line allows for extra fuel to be sent but if not used just sent back. So returnless means no extra fuel. Companies aren't really having a hard time doing it, they are having a hard time doing it legally. the returnless fuel line is part of how the 7th gens got their ULEV rating(cuts way down on vapor lose), you can't just get rid of that rating. you still have to pass emissions. You could try the piggy back sysytems like that but those system are only good for small ajustments, like I believe the s-afc is and 8 point one. NOT the quality you would want to run a turbo. and even if you did do that it's pretty limited. Your best bet is what most people are doing, waiting for a hondata or someone to come out with a real fuel managment system. once that happens I'm sure you will see a lot more turbos. then you can get bigger injectors, increase fuel pressure....all that stuff.
02-18-2003
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[hr]Originally posted by: 2001civ
It's hard because you don't have that extra fuel on hand when you need it for something like a turbo. That return line allows for extra fuel to be sent but if not used just sent back. So returnless means no extra fuel. Companies aren't really having a hard time doing it, they are having a hard time doing it legally. the returnless fuel line is part of how the 7th gens got their ULEV rating(cuts way down on vapor lose), you can't just get rid of that rating. you still have to pass emissions. You could try the piggy back sysytems like that but those system are only good for small ajustments, like I believe the s-afc is and 8 point one. NOT the quality you would want to run a turbo. and even if you did do that it's pretty limited. Your best bet is what most people are doing, waiting for a hondata or someone to come out with a real fuel managment system. once that happens I'm sure you will see a lot more turbos. then you can get bigger injectors, increase fuel pressure....all that stuff.[hr]
[hr]Originally posted by: 2001civ
It's hard because you don't have that extra fuel on hand when you need it for something like a turbo. That return line allows for extra fuel to be sent but if not used just sent back. So returnless means no extra fuel. Companies aren't really having a hard time doing it, they are having a hard time doing it legally. the returnless fuel line is part of how the 7th gens got their ULEV rating(cuts way down on vapor lose), you can't just get rid of that rating. you still have to pass emissions. You could try the piggy back sysytems like that but those system are only good for small ajustments, like I believe the s-afc is and 8 point one. NOT the quality you would want to run a turbo. and even if you did do that it's pretty limited. Your best bet is what most people are doing, waiting for a hondata or someone to come out with a real fuel managment system. once that happens I'm sure you will see a lot more turbos. then you can get bigger injectors, increase fuel pressure....all that stuff.[hr]
edit : btw it can also control extra injectors retard the timing and you can save maps. also can change vtec engagment.
02-18-2003
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Rep Power: 0 One other thing is neither one of those devices, to my knowledge, has the capability to vary the fuel map with boost. I am almost certain they can only change the mixture according to rpm's....
02-18-2003
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Rep Power: 0 correct rpms and throttle position. boost is really irrelevent. u can't just plug in a psi number and expect it to work right. psi really has nothing to do with it.
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