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Originally Posted by newdrifter5
i think theres alot of misinformation on this subject. People should REALLY research before they post. First off the bmw m3 uses itbs and a maf and is one of the best N/A powerplants ever for its size. Skylines use itbs and i believe nissan pulsars which was a little mini skyline AWD and TURBO. ITBs on our cars WOULD NOT COST 6000. The hardest thing about putting itbs on a car not equipped is tuning. Tuning off a MAP signal is very hard because it becomes very erratic when the throttle is punched dropping very quickly and rising the same. Thats y almost all running itb setups use tps signals as a main reference. but if u incorporate a plenum into ur systems u can now run a maf sensor which until now i never really thought about(being a honda guy for many years) which should really help that problem since all factory itb cars seems to have been running them m3, skyline, pulsar. So, if u can have a plenum attached to ur itbs, tuning with a reflash will be very feasible and i believe drivablility very nice due to our air metering sytem. But u may not be very pleased with them without larger cams(stage 2 and up) since i always hear about itbs responding well to big cams. But they would DEFINATELY be a upgrade from our VERY restrictive intake setup stock. Im always down to talk about some itb setups(i have 2 in my grage right now) so lets keep this topic rolling.
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No one said they weren't effective, just a bit of reading tells you that they'd work. 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?