too lean?

[UFgatorZ]

i have heard that having a cold air intake and a plenum spacer can cause the car to run too lean due to too much air, is this true and if so is there still a way to capitalize on the power gains from both such as increasing fuel pressure or something?

[MATTY_T]

UTEC or something along that line would work. When you put bolt ons on the Z you HAVE to tune it to get the most out of it. I also have intake, plenum spacer, test pipes, (soon to be exhaust) but I need to get UTEC to make it all worth the money. BTW, AEM is coming out (or might have just came out) with a new system for the Z, its about 430 and you can get the wideband for it for like another 250-300. Im thinking about going with that instead of the UTEC, still not sure. I believe their is a post in the 350z section about the AEM, check it out.

[evildky]

the extra air might lean the mix a touch but not enoutgh to be a problem, unless your adding forced induction you should be fine on the stock ecu, some tuning might yield a little more power btu the stock tune is very conservitive and lean makes more power than rich