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Great work..!! And I applaud you on the DIY post & info..
The most important part of reinstalling any O2 or A/F sensor is too never allow the wiring to be wound up on the reinstall.. It creates a problem and eventual failure.
Simple solution is to counter twist the exact amount of turns before threading in, to ensure the wires are perfectly straight once installed..
On the stock sensor and thread it's approx 2 & 3/4 counter clockwise turns from a perfectly straight 4 wires..
Joe Z
You can also remove the socket clip around the transmission area from under the carpet near the knee areas. No need to guess how many turns to wind it lol, just clip it back on once the o2 sensors are in.
You can also remove the socket clip around the transmission area from under the carpet near the knee areas. No need to guess how many turns to wind it lol, just clip it back on once the o2 sensors are in.
Good call! I knew there had to be a connector somewhere....didn't feel like doing a search for it though, haha. Thanks for the info!
So what you're trying to say is that with a CAT-back exhaust and CAT removal there shouldn't be any issues with the O2 sensor after the CATs? Everything was checked for leaks upon test drive after installed, btw.
Sorry bud, I thought you were still running the Primary Cats
It seems that most people know what they are talking about my question is. If i do delete cats in manifold will that make me fail SMOG. And so people here have mentioned deleting 2ndary cats and mufflers replace with straight pipes and getting gains. Not having alot of money and time,what would be my best option. Im all stock except K&N filter. Thanks for the info.
It seems that most people know what they are talking about my question is. If i do delete cats in manifold will that make me fail SMOG. And so people here have mentioned deleting 2ndary cats and mufflers replace with straight pipes and getting gains. Not having alot of money and time,what would be my best option. Im all stock except K&N filter. Thanks for the info.
Ryan
Yes, deleting the main cats will cause headaches with your emissions testing. If you don't have a lot of cash, don't touch anything in the header.
From multiple posts, the secondary cats hold things back....along with the crimp in the exhaust and the finally the mufflers. I will be honest the muffler delete might not be for day to day driving.
I'm planning on eventually buying a new/used borla exhaust and calling it a day....but I daily drive my car and dont want to do too much to it, in case some idiot crashes into me...
Yes, deleting the main cats will cause headaches with your emissions testing. If you don't have a lot of cash, don't touch anything in the header.
From multiple posts, the secondary cats hold things back....along with the crimp in the exhaust and the finally the mufflers. I will be honest the muffler delete might not be for day to day driving.
I'm planning on eventually buying a new/used borla exhaust and calling it a day....but I daily drive my car and dont want to do too much to it, in case some idiot crashes into me...
thanks for the input,im going to go delete the secondary cats and mufflers replace with straight pipes.
I'm curious of how these gain compare to aftermarket headers. The oem headers don't look very restrictive. Does any one know the cell counts on primary cats vs secondary cats?
Okay... so I just got a baseline dyno on my completely stock 2012 IS-F Yesterday.
It was DynoJet, put down 348whp.
I was going to do PPE headers first then redyno but I'm VERY tempted to gut my cats and do a STOCK, GUTTED CATS, PPE Header comparison to put this discussion to rest...
Should be pretty accurate since all will be done on the same exact dyno.
I'm just afraid I won't be able to source a another set of factory headers if I chose to go back to stock..
Did you end up gutting the cats before the PPE headers?? And then dyno the car??
ive been to the track a few times now and have been consistently running between 12.39-12.5 with gutted cats and borla exhaust with upsized tires (275). I'm installing PPE headers within the next week and will be making another trip up to New England drag way. I'm hoping that I'll break into the 12.2's with headers. To my knowledge I don't think someone has done a comparison like this yet. I'm looking forward to the results.
ive been to the track a few times now and have been consistently running between 12.39-12.5 with gutted cats and borla exhaust with upsized tires (275). I'm installing PPE headers within the next week and will be making another trip up to New England drag way. I'm hoping that I'll break into the 12.2's with headers. To my knowledge I don't think someone has done a comparison like this yet. I'm looking forward to the results.
01-17-15, 12:33 PM
