katit

iTrader: (1)

I wonder what gains could be achieved with tuned PFC?

I'm thinking about installing stock cat and muffler back (I will leave downpipe)
Can't tolerate sound out of my exhaust.

I will also have Blitz SMIC

What kind of WHP I should count on in this setup?

grimple1

iTrader: (1)

if you're putting the stock cat and muffler back on from an aftermarket .. . then it's probably a decrease in hp.

fendamonky

iTrader: (6)

At the very least you should be able to expect a small increase from un-tuned to tuned (with tuning as the variable, not modification level more/smarter mods + tune will net more HP than less mods + tune, obviously).. If nothing more you would get better gas mileage (OR you can increase boost and tune the AFR's to match, getting you a moderate increase in HP, depending on how high you can constantly get the boost with the restrictions of the stock system..)

With reliability mods and moderate bolt ons I saw an increase from 240whp to 280whp with a *conservative* tune.

AdamBench

ya i had intake adn exhaust and saw larger gains than that but it wasnt quite as conservative and i only ran it that way for a short time then i had the whole thing overhauled

gracer7-rx7

iTrader: (16)

Probably not much unless you turn up the boost. The factory ECU works up to 10 PSI. With the PFC you should be able to run 12 PSI but do go to the FAQ thread and research what the stock fuel system can support before you take my word for it. The larger Blitz SMIC will also work better than the stock IC which was only designed for 10 PSI.

IMO, the car sounds good with a downpipe, stock cat and Racing Beat cat back exhaust but "sounding good" is very objective. I'd sooner do the RB cat back than a PFC.

katit

iTrader: (1)

I got PFC already and I have Greddy (Trust) exhaust with Bonez cat

Greddy too loud. RB sounds pretty good but little bit on loud side and e$$pensive.

My feeling is that tuned stock car will be faster then stock ECU car with exhaust.
Even with stock boost levels

7_rocket

iTrader: (6)

RB exhaust are the quietest exhausts for the car.

Mahjik

iTrader: (1)

There will be some power gains, but not a lot. Someone dyno'd a car with full bolt-ons and the stock ECU at a little under 10 PSI for 266rwhp. Most cars with bolt-ons and a PFC running 10 PSI will dyno in the 270'ish rwhp range.

katit

iTrader: (1)

Hm. That is very strange. That means that stock ECU very well tuned for performance. Tuning ECU is equal to what they call "chipping" and usually gives + 20hp or so.

Maybe PFC didn't do much in your example because stock ECU was already pretty lean with those bolt-ons.

Mahjik

iTrader: (1)

For the most part yes. On a FI car, if you want more power; raise the boost. Basically the simplest way to accomplish the task.

Sgtblue

iTrader: (16)

I've got that same cat-back and cat, with a bonez downpipe. If your PFC is new and the later version, it comes with a pretty decent base map for your mods.
No real dyno figures, but after installing the PFC my butt dyno saw a small increase in power throughout the range. Nothing dramatic, but it was there.
There are other advantages to the PFC, even if you don't intend to further modify and tune. The processor is quicker than the stock ECU and the 3k hesitation will just be a bad memory. Casual checking also saw a slight (maybe 1 to 2 mpg) increase around town on the base map, not to mention the monitoring capabilities with the commander.

katit

iTrader: (1)

I keep PFC that is no doubt. I have datalogit, wideband and CarPC is on a way. I will be able to use FC-Edit in a car without carrying laptop. This is cool part about PFC and my project.

I just need to battle noise