Fuel Management Options On A Low Boost Set Up
10-10-2008, 01:00 PM
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Ok guys, after searching through the forums and not finding exactly what I was looking for this is my first real post. (I try to search first because I HATE posting a question that has already been answered. And if I didn't search hard enough please don't hate.)
Anyway, I plan on building a turbo kit for my Tib 1.8 and need some help with fuel management options. The highest I want to run is around 7~8 psi. Now I would rather not spend $1,000 plus on a stand alone computer. I am sort of leaning towards an FMU along with 290cc injectors, a 255lph fuel pump, and the ECU off of a 2.0. Does this sound doable? If so does all this seem like I would be running too rich?
Anyway, I plan on building a turbo kit for my Tib 1.8 and need some help with fuel management options. The highest I want to run is around 7~8 psi. Now I would rather not spend $1,000 plus on a stand alone computer. I am sort of leaning towards an FMU along with 290cc injectors, a 255lph fuel pump, and the ECU off of a 2.0. Does this sound doable? If so does all this seem like I would be running too rich?
10-10-2008, 01:05 PM
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290's will be too rich at idle and off-boost. You need a way to trim some fuel. To go real cheap, try an SAFC2. Or for a little more, AEM FIC or an SMT-6.
10-10-2008, 02:44 PM
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you could get a RRFPR and adjust the idle pressure down with the bigger injectors.
the turbo kits im working on will work that way for low boost (4-6psi) and will be offering the AEM F/IC and UEGO for higher boost setup.
the turbo kits im working on will work that way for low boost (4-6psi) and will be offering the AEM F/IC and UEGO for higher boost setup.
10-10-2008, 03:23 PM
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I checked out the Apexi SAFC II and I think I will end up going with that along with a wideband o2 sensor kit so I can know if I am too rich or lean throughout the powerband. Then I can fine tune it by adjusting the fuel map like the SAFC II lets you do.
10-10-2008, 06:37 PM
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dont plan on pushing more than like 4-6psi with an SAFC II.. those are garbage for turbo setups with any decent boost.
the tibs ECU is too much of a PITA and will correct itself after a few days or less. i believe it will happen if you adjust more than +-25%.
the tibs ECU is too much of a PITA and will correct itself after a few days or less. i believe it will happen if you adjust more than +-25%.
10-11-2008, 12:14 AM
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Yeah but the SAFC II would be just for correcting the richness during idle and no boost. Then leave the fuel map untouched past like 2500 RPM or something like that. The 12:1 FMU will do the rest under pressure. Right?
10-11-2008, 08:03 AM
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FMU's are garbage.. thats why pretty much no one thats boosted has one in their car. speed-factor used to offer them in their basic kit a long time ago and no one was really successful with the FMU's as far as i know.
FMU's work alot better on supercharged engines because they have linear boost, turbocharged engines do not.
FMU's work alot better on supercharged engines because they have linear boost, turbocharged engines do not.
10-11-2008, 08:06 AM
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QUOTE (SOCKS @ Oct 10 2008, 08:37 PM)
dont plan on pushing more than like 4-6psi with an SAFC II.. those are garbage for turbo setups with any decent boost.
the tibs ECU is too much of a PITA and will correct itself after a few days or less. i believe it will happen if you adjust more than +-25%.
the tibs ECU is too much of a PITA and will correct itself after a few days or less. i believe it will happen if you adjust more than +-25%.
Change all ECU constant power 12V lines over to hot-at-on power. This way you reset the ECU every time you turn on the car. Should never be able to learn anything.