Fuel tuned

Rooskey

So when I add intake and exhaust to my car I should keep my same fuel ratio. I do not want to add fuel pressure even in this case. If I do go lean on a dyno at least I can correct it.

WarmAndSCSI

Messing with your fuel pressure only serves to throw off your closed loop fuel trims. This is by far the worst way of tuning ever. Your car has electronically controlled fuel injection, which happens to be tunable electronically, please don't tune it like it has a carburetor.

Plus I'm pretty sure our fuel pressure regulator is located in-tank along with the filter and pump.

__________________

Jordo!

#1, an intake and exhaust isn't going to make so great a difference that the ECU can't compensate with fuel trims -- in fact, it doesn't even appear to result in trims that are out of the "normal" range, and I've heard very few reports of driveability quirks that can be clearly traced to those bolt-ons.

Speaking of bolt-ons and AFR's, there are some dynos posted on here from Import Tuner Magazine of a 370Z with intake, intake+exahust, and both + tuning.

Interestingly enough, there is virtually no difference between the AFR's before and after the tune... in other words, you should be fine without tuning for those bolt-ons, although the tune would allow you to optimize performance, it doesn't appear to be mandatory for bolt-ons.

#2, If you really want to play with the AFR's, with or without bolt-ons, see about getting a Cobb Accessport or the Uprev Osirus ECU programmer/reflasher, and schedule some dyno time.

#3 If you were boosted, you would have serious fueling issues with the OEM set-up, and your concerns would be warranted. However, even with a blower or turbo, before going to an AFPR, you'd probably just upgrade to bigger fuel injectors. Tuning the ECU would be a must at that point as well.

__________________
Enjoy it. Destroy it.