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Originally Posted by 2dr_Sentra
Wheres the injectors? what ecu are you going to run or are you going to get a wideband a SAFC? You need to do alot of research before you turbo the car.
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Yes we know that 2dr_Sentra, thank you. It has been discussed many times over the past three or so years that we have seen this kit become available. The economical "foot in the door" price of $1400 to boost our GA16DE's is very attractive to alot of us on these boards.
The result of all of these discussions regarding a safe reliable engine management for this system is that there are
many options available to us, only none of them are cheap.
But us frugal GA16DE owners never give up on our quest for cheap reliable boost. So lets continue to brainstorm here. I have come up with a new idea of how an economical fuel system upgrade could be "engineered" at home.
I invite the more experienced boosters to shoot all of the holes in this they want. It is a suggestion and if someone knows of a reason it won't work, please let us know.
It is generally agreed upon that the stock 185cc injectors are a major limiting factor for boosting our GA16DE's. So they have to go. Changing to larger injectors mandates an ecu reprogram or stand alone fuel management system. Both are expensive.
A new idea perhaps?
Lets's take a minute and compare the stock engine management systems and fueling requirements of the B13's GA16DE and SR20DE engines. Both get about 30 mpg in the same car. Both use an air mass meter to measure the amount of incoming air and adjust the mixture acoordingly [within a window of parameters course].
Ok, with that said, consider that the 30% increase of power that the TSI Superior [T20] kit is advertising will bring a 110 h.p. GA16DE up to about 140 h.p. at full throttle. The SR20DE ecu is programmed to support exactly that. See where I'm going? I'm not saying I've got this all worked out, but this is starting to look good. I have a good running '92 SE-R parts car. My idea is to swap over the SE-R's ecu, the four 259cc SR20DE injectors into the GA's fuel rail, and the air mass meter to keep the SR's ecu happy. My guess is that the GA might be a bit rich when not in the boost [which is about 98% of the time for most of us]. In addition to the small amount of correction the stock ecu can make via the air mass meter, perhaps the rising rate fuel pressure regulator [which comes in the turbo kit] can be adjusted down enough to correct this. Yes, you'd need a wide band to check this as you go. Remember that the GA engine will be drawing less air than the SR through the SR air mass meter, so that in itself should help in that regard.
Footnote: I know that the B13 GA16DE's ecu cannot be reprogrammed, and that the standard operating procedure is to aquire an SR20DE ecu and have it reprogrammed for use in our boosted GA16DE's.
Question: Does this mean that a stock SR20DE ecu will plug right into the GA's ecu connector [with it's matching air mass meter] and run? This whole idea revolves around the anwer to this question. In other words, is the order of the pin terminals similar on each ecu? I'm not concerned with the lack of the variable timing control signal as that can be connected with an rpm switch if need be.
Thanks,
Mike
