Expert Advice Needed: Fuel Tuning a Turbo'd S2K
12-03-2002, 09:43 AM
#41
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Originally posted by schwett
there's some good info here.... one critical question for all the speedcraft people : does the inline pump supplied with the kit (a bosch, i hope?) affect fuel pressure in vacuum? most of them do, to some extent.
there's some good info here.... one critical question for all the speedcraft people : does the inline pump supplied with the kit (a bosch, i hope?) affect fuel pressure in vacuum? most of them do, to some extent.
12-03-2002, 12:48 PM
#43
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The Speedcraft kit comes with an inline fuel pump that serves (if I understand this correctly -- and I may not!) *only* to increase the amount of fuel available. Actual fuel pressure is then regulated by the Vortech Fuel Management Unit. The Vortech FMU (I'm told by Todd at Speedcraft) increases fuel as a linear function of boost. No boost, no increase in fuel pressure over the stock setup (which is what I understood Schwett was asking). Or at least so says Todd. But Todd hasn't actually checked the fuel pressure at idle to know for sure.
12-03-2002, 07:34 PM
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[QUOTE]Originally posted by cbender
[B]The Speedcraft kit comes with an inline fuel pump that serves (if I understand this correctly -- and I may not!) *only* to increase the amount of fuel available.
[B]The Speedcraft kit comes with an inline fuel pump that serves (if I understand this correctly -- and I may not!) *only* to increase the amount of fuel available.
12-07-2002, 04:35 PM
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Latest update (of the no-news variety)... my car's not going to return from the bodyshop until late next week, but I'll keep you all posted as soon I have the chance to fuss with Gile's settings (and RT's old VC2 electronic check valve). Thanks for standing by.
12-07-2002, 06:29 PM
#48
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one additional note : many FMUs (i've personally used a couple) DO increase the pressure at all times depending on their settings. while a rising rate FMU doesn't really "rise" until it sees positive pressure, it has internal restrictions which are affected by where the baseline is set.
i have never been able to self-tune an FMU'd FI honda without an in-cockpit fuel gauge. it's invaluable......
i have never been able to self-tune an FMU'd FI honda without an in-cockpit fuel gauge. it's invaluable......
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