NastyNate65

Just like the title says. I did a search but didnt find anything concrete. I am buying pacesetter longtubes and ORY today and was wondering if i need to dish out $40 for O2 extensions. I have heard of some people tuning out the rear O2 sensors completely. If i deleted the rear O2s does that mean that I would not need the extensions? Im just trying not to waste money.

Pitbull329

iTrader: (3)

You need the o2 extensions for the front.

Not sure what lengths.

I recently did my header install, and I swapped out some pins on the PCM. So, now the pcm sees the rear o2 connections as front o2s

NastyNate65

Ok man thanks for the info. I wasnt sure if they were for the front or rear. How did you do the pin swap in the PCM?

Pitbull329

iTrader: (3)

Assuming its for your 98. Heres a link on how he went about doing the pin swap.

https://ls1tech.com/forums/pcm-diagn...front-o2s.html

Here is the setup of how your pcm is wired.

http://www.ls2.com/boggs/torques/98pinpcm.htm

Its like a 5 minute job.

o2 extensions wont be necessary if you do this. Since the rear o2 connections are near the o2 bungs on your LT headers.

cyberkill

I just bought Pacesetter/TSP Y combo from TSP and it says that it comes with "wire to manually extend the front O2 sensor via cutting and splicing." I don't know how hard this is, but I'm definitely going to give the Rear O2 conversion a try.

SMALLBLOCKHERO

iTrader: (2)

when i did mine ,the pass side seemed long enough to not need an extension. but driver side surely did. i just had the rear O2's turned off in the tune.

Pitbull329

iTrader: (3)

Don't forget to go by the year of your car. I know from 98 to 99, the wiring changed.

NastyNate65

Well i just bought the headers/ORY with the O2 extensions to make it easy on myself. But i just got a better paying job so its all good

cyberkill

By it being a 5 minute job, it sounds pretty simple, but is there a writeup for this? How do you "swap pins"? I thought you couldn't pull out those wires.

Justus67

iTrader: (3)

Get the extensions it makes it easier, if you end up not using them sell them on here. But I had to use them on mine, and I used O2 simulators.

TooLateVTEC

iTrader: (2)

Im not sure how different your car is from mine, but my wiring harness for the rear o2s were at the tailshaft of the tranny...AKA nowhere ****** close to the collectors LOL

blackfbird98

i just did my headers this past weekend. i got the bosch 3111 oxygen sensors and havent had any probems and they are plenty long i had to actually zip tie some of it cause they were so long. as for the rear o2's you can jus have them tuned out if you get a dyno tune thats what im doing.