FD3SR1

I was told that i needed a wide band o2 sensor. do i need a wide band with an apex-i pfc when going single? if so where do i get one?

modrx7

iTrader: (1)

you will need the wideband o2 sensor in the downpipe, at least for tuning purposes at minimum

Edan

TEZTnTUNE

if your going to be tuning your powerFC you will definitely need one. if u dont know what a wideband lamda meter is u can try a search. now if your going to go get your powerFC tuned at a shop with a dyno, u can just rent theirs.

DCrosby

........ you shouldn't get one, because you obviously have no clue on what you're doing. Have your car tuned by a professional....

Wideband is needed for tuning, since the (stock) single wire O2 is used for closed loop mode, (when cruising on the freeway) when the ECU is trying to reduce emmissions and fuel economy... but it's only so accurate, as all it can tell if things are pig rich or way lean... a wideband is a sensetive instrument, that is pre-heated upon igntion trigger, and can read accurate fuel ratios throughout it's band usually 10-20 or somewhere near there... depends on who makes the sensor. The factory sensor usually outputs a 0-1v signal, the wideband usually puts out a 0-5v signal... (More resolution)

Also don't stick a wideband's input into the stock ecu, it will either fry, or royally confuse your stock system.

FD3SR1

im not going to tune the car myself. im trailering it to have it tuned by gothamRacing or RP. where is a good place to pick one up? i havnt seen one for sale anywhere.

TEZTnTUNE

i ve been usuing a plx-300 for years. works great

FD3SR1

where can you find one?

APEXL8T

Some info...http://www.megasquirt2.com/PWC/lsupur.htm

FD3SR1

will those fit on an rx7?

DCrosby

www.horespowerfreaks.com is where I got mine.... for me it was a "In Stock" situation, NGK (Honda) Sensors are in high demand, and they don't make that many / year....
O2 Sensors are O2 sensors, I don't think you'll have a problem, I thought I had to weld in a standard "Bung" and it ended up fitting in the stock location....
I'd ask the seller just the same....

FD3SR1

cant you get just the sensor? The pfc reads a/f ratios correct? if so couldnt you just tune off of the power fc insted of paying 300+ for the entire system?

DCrosby

Well, yes and no, you need the heater, and controller, since the controller interprets the system's signal and outputs the 0-5v signal. This is neccisary for the Power FC or any ECU needs to read the signal, then what you might not need, is the Readout Box, which does the same thing as the Apexi box does... it just shows you the numbers on a LED display. So the display box is not neccisary, yet the controller / heater are...
HPFreaks has a cheaper setup that just comes with the contoller and sensor... I'd immagine otehrs would too...

XSTransAm

if hes having the car tuned by gotham or rp, and it sounds like he dosent plan on doing any tuning by himself, why would he need a afr meter?

FD3SR1

so I dont relly need one correct? wide bands are only good for tuning correct?

DCrosby

Well it's in the same sort of category as the AFR / EGT Gauge.... people who know how to tune will pay attention to them to see how well the car is tuned, or how much it is out of tune... but it's not one of those things that you use on a daily basis like a boost gauge, or Rad. Temp. Gauge....

I eneded up buying one, in the hope of learning how to tune, and ended up eventually blowing my motor, and sad to say I'm not exactly sure, why it blew, so I didn't even learn much from the process, except to leave it to people who rebuild their own motors, or can afford to rebuild every 6 mo.

I suppose once the car is tuned, and you change something, like midpipe etc... it is possible that you could see the AFR change, and make minor adjustments, to bring it back into spec, but I don't reccoment tuning from scratch if you've never done so...

So it's a valuable tuning tool, but not a neccecity, and you definitely can get better add-on's for you FD that are more valuable to you as an end user...