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Originally Posted by mozart4898
However, you're using as your examples cars that already come with ITBs! How can you compare that to our car, which the last I checked, only has one throttle body? OK, somehow you fabricate a plenum to work with the RPW 6 pack throttle body (but something in my mind tells me that defeats the purpose of them anyways and also just plain won't fit under the hood). You still have 6 throttle bodies, and a stock ECU that's only set up to control 1. What I mean to say is, when you press down on the gas (the "throttle") it opens the throttle body, 1 of them. If you add 5 more, how are you going to control that? Sure, simply opening and closing them is probably just a matter of the throttle cable, but there's more to it than that. The ECU meters everything - don't you think that it'll get just the slightest bit thrown off by the effects of 6 throttle bodies, instead of the 1 that we have stock? Regardless of how it's metered or what signal you're tuning off of, how does the stock ECU (even reflashed) deal with the effect of 6 independent throttle bodies? How, now, do you not have a tuning issue that would require a standalone?
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1st: I used the example of the m3 skyline and pulsar to show what 3 factory itb equipped cars with notable performance have in common: plenums, maf sensors, and very stock drivablility.
2nd: the ecu does not control our throttle body, since last time i checked were not drive by wire.The ecu does get a tps signal off the side of onefor assessing load. All itbs ive ever seen still have tps sensors so thats not a problem.
3rd, a simple linkage system opens and closes all the throttle bodies at the same time so thats not really an issue EXCEPT for setting all of them to close the same which is just a little fine tuning.
Lastly yes i DONT think these could be tuned on our cars in 5 minutes with a proper setup. It would be a little tricky but i think the very capable reflash with its ability to control fuel and ignition tables would be able to get it sorted out on a dyno with alot of tlc. U have to remember the MAIN item telling how much fuel to inject is the maf which only reads how much air is passing thru it. U nail the gas with an itb setup its gonna read the airflow change and send a proper signal. Im very hopeful for this concept and will probably be goin the N/a myself on my gts in the future. Long live the 3g!