FT-86 SpeedFactory Catted UEL Header

[STV3]

Originally Posted by chas3wba0

Sound clip pls

Edit: NVM found it

Was it this one? Because this is the most recent.
[ame]http://youtu.be/9_QCk_kURcI[/ame]

Really need to stop being lazy and make one while driving.

[SCharged]

P0420 here too.. wasn't expecting this with this header, but hey, you gotta pay if you wanna play I guess.

[Cartman]

So... After 3500 miles, I got the P0420 code with my @FT-86 SpeedFactory header, I only have a catted FP, 2.5" Overpipe, drop in filter and manifold spacers.

I feel that my cat might actually be bad, as I've felt the car rather sluggish the past month. Feels slower than when I had the stock header on. And I don't know if this cat works differently than normal ones, but I did the temperature test a few days ago, and the exhaust side is colder than the intake, which is a clear indicator of a fautly cat. Intake side was reporting 360C while exhaust side was around 300C.

[Sypher]

Originally Posted by Cartman

So... After 3500 miles, I got the P0420 code with my @FT-86 SpeedFactory header, I only have a catted FP, 2.5" Overpipe, drop in filter and manifold spacers.

I feel that my cat might actually be bad, as I've felt the car rather sluggish the past month. Feels slower than when I had the stock header on. And I don't know if this cat works differently than normal ones, but I did the temperature test a few days ago, and the exhaust side is colder than the intake, which is a clear indicator of a fautly cat. Intake side was reporting 360C while exhaust side was around 300C.

is your catted front pipe the factory pipe or aftermarket?

i noticed huge AFR changes when i had a full exhaust with the Speedfactory header. my car managed to only throw the code a couple times over 12k+ miles but i know it had to do with the other exhaust mods combined with the header. I guarrentee your light is popping on because you have too many mods without a tune which is causing your AFR's to be out of tolerance. AFR's out of tolerance will cause your exhaust gasses to be wrong, either rich or lean, and will cause the faulty cat code to come on. Our stock tune doesn't like it when we start tacking on a bunch of mods.

FWIW i lost a freeway race to a friend with a muffler delete and catless front pipe while i had full exhaust. I later found out it was the AFR's making my car SLOWER. I now have a tune and the car rocks now with proper AFR's

Also if i'm reading your temperature discription correctly it sounds as if your cat is fine. exhaust is hottest when it leaves the heads and will begin to cool throughout the exhaust. while a cat does retain a ton of heat it isnt crazy to think the exhaust is cooling by the time it leaves the cat.

hope that helps

[chas3wba0]

Originally Posted by Sypher

is your catted front pipe the factory pipe or aftermarket?

i noticed huge AFR changes when i had a full exhaust with the Speedfactory header. my car managed to only throw the code a couple times over 12k+ miles but i know it had to do with the other exhaust mods combined with the header. I guarrentee your light is popping on because you have too many mods without a tune which is causing your AFR's to be out of tolerance. AFR's out of tolerance will cause your exhaust gasses to be wrong, either rich or lean, and will cause the faulty cat code to come on. Our stock tune doesn't like it when we start tacking on a bunch of mods.

FWIW i lost a freeway race to a friend with a muffler delete and catless front pipe while i had full exhaust. I later found out it was the AFR's making my car SLOWER. I now have a tune and the car rocks now with proper AFR's

Also if i'm reading your temperature discription correctly it sounds as if your cat is fine. exhaust is hottest when it leaves the heads and will begin to cool throughout the exhaust. while a cat does retain a ton of heat it isnt crazy to think the exhaust is cooling by the time it leaves the cat.

hope that helps

Great info. I haven't seen the CEL since that one time ~1k miles ago and I've been to stock tune and back to Stage 1... guess I won't worry too much if/when I see it again

[Cartman]

Originally Posted by Sypher

is your catted front pipe the factory pipe or aftermarket?

i noticed huge AFR changes when i had a full exhaust with the Speedfactory header. my car managed to only throw the code a couple times over 12k+ miles but i know it had to do with the other exhaust mods combined with the header. I guarrentee your light is popping on because you have too many mods without a tune which is causing your AFR's to be out of tolerance. AFR's out of tolerance will cause your exhaust gasses to be wrong, either rich or lean, and will cause the faulty cat code to come on. Our stock tune doesn't like it when we start tacking on a bunch of mods.

FWIW i lost a freeway race to a friend with a muffler delete and catless front pipe while i had full exhaust. I later found out it was the AFR's making my car SLOWER. I now have a tune and the car rocks now with proper AFR's

Also if i'm reading your temperature discription correctly it sounds as if your cat is fine. exhaust is hottest when it leaves the heads and will begin to cool throughout the exhaust. while a cat does retain a ton of heat it isnt crazy to think the exhaust is cooling by the time it leaves the cat.

hope that helps

The power loss started after a few weeks of running the OFT BPB UEL Stg 2 tune, I reverted it back to stock 2 weeks ago and have similar power surge feeling as when I had the tune, though not as noticeable.

And no, that's not how a cat works, a cat is supposed to run 100 to 150 degrees hotter on the outlet side than the inlet side, that's how you know your cat is working correctly. It's essentially an oven that cooks NOx

Anyways... I'm playing with the idea of just chopping off the cat and going catless

[s2d4]

Originally Posted by Cartman

The power loss started after a few weeks of running the OFT BPB UEL Stg 2 tune, I reverted it back to stock 2 weeks ago and have similar power surge feeling as when I had the tune, though not as noticeable.

And no, that's not how a cat works, a cat is supposed to run 100 to 150 degrees hotter on the outlet side than the inlet side, that's how you know your cat is working correctly. It's essentially an oven that cooks NOx

Anyways... I'm playing with the idea of just chopping off the cat and going catless

Probably better to just sell it and get one uncatted and for others to begin with rather than cut it up to fix compromises.

[Cartman]

Originally Posted by s2d4

Probably better to just sell it and get one uncatted and for others to begin with rather than cut it up to fix compromises.

If the cat is fucked... I can't really sell it, now can I...

[STV3]

Originally Posted by Cartman

The power loss started after a few weeks of running the OFT BPB UEL Stg 2 tune, I reverted it back to stock 2 weeks ago and have similar power surge feeling as when I had the tune, though not as noticeable.

Do you think that the OFT UEL stage 2 tune is the cause of your cat possibly going bad?

I just got my OFT in the mail last week and am using the same Stage 2 tune to rid of my p0420 CEL. I did notice a new burning smell after running the car hard that was never present before the tune.

[Cartman]

Originally Posted by STV3

Do you think that the OFT UEL stage 2 tune is the cause of your cat possibly going bad?

I just got my OFT in the mail last week and am using the same Stage 2 tune to rid of my p0420 CEL. I did notice a new burning smell after running the car hard that was never present before the tune.

AFR with that tune runs a bit rich, I flashed that tune with BRZ edit on a dyno, tested it, and altered the mix with a tuner buddy of mine. IIRC mix was dropping to 11.4 AFR under WOT on my car, we altered it to where it only dropped to 11.96 AFR under WOT.

[FT-86 SpeedFactory]

Originally Posted by Cartman

If the cat is fucked... I can't really sell it, now can I...

The cat has a 5yr warranty and rated for airflow at 5.XL of air when in use.

If the cat is bad it can be replaced under our warranty program, although a tune not made specifically for this header can definitely cause issues.

Please if you are running a tune with this header do not use a tune meant for a catless header. They are very different animals. Runner length, collector, and cat are all different. Running a tune not optimized for something as important as a header will definitely cause sluggishness and a slew of other issues.

[Sypher]

Originally Posted by Cartman

The power loss started after a few weeks of running the OFT BPB UEL Stg 2 tune, I reverted it back to stock 2 weeks ago and have similar power surge feeling as when I had the tune, though not as noticeable.

And no, that's not how a cat works, a cat is supposed to run 100 to 150 degrees hotter on the outlet side than the inlet side, that's how you know your cat is working correctly. It's essentially an oven that cooks NOx

Anyways... I'm playing with the idea of just chopping off the cat and going catless

ok fair enough. but if you think it's a clogged you could do a vacuum test to see for sure. low vacuum would verify your analysis of a clogged cat.

also a clogged cat or any part of the exhaust for that matter typically results in a constant loss of power. doesnt really surge as you describe. I had an 89 camry with a clogged primary cat and it just didnt want to go. was slow as shit. after new cat it felt like it gained 50% more power.

[Cartman]

Originally Posted by FT-86 SpeedFactory

The cat has a 5yr warranty and rated for airflow at 5.XL of air when in use.

If the cat is bad it can be replaced under our warranty program, although a tune not made specifically for this header can definitely cause issues.

Please if you are running a tune with this header do not use a tune meant for a catless header. They are very different animals. Runner length, collector, and cat are all different. Running a tune not optimized for something as important as a header will definitely cause sluggishness and a slew of other issues.

I know about the warranty, shipping is what's making it not worth it, it'll be cheaper to cut my losses and cut the cat locally and install a straight pipe to it.

As far as the tune goes, like I stated on my previous post, we altered the fuel trims on the tune to something more acceptable for the header, and actually gained HP over the OFT.

Originally Posted by Sypher

ok fair enough. but if you think it's a clogged you could do a vacuum test to see for sure. low vacuum would verify your analysis of a clogged cat.

also a clogged cat or any part of the exhaust for that matter typically results in a constant loss of power. doesnt really surge as you describe. I had an 89 camry with a clogged primary cat and it just didnt want to go. was slow as shit. after new cat it felt like it gained 50% more power.

I might have to try a vaccum test. Who know if it could be my stock catback causing issue.

[STV3]

Originally Posted by Cartman

AFR with that tune runs a bit rich, I flashed that tune with BRZ edit on a dyno, tested it, and altered the mix with a tuner buddy of mine. IIRC mix was dropping to 11.4 AFR under WOT on my car, we altered it to where it only dropped to 11.96 AFR under WOT.

Yeah I saw that on mine too but IDK how accurate the AFR reading is on the OFT seeing as its reading from the stock sensor. Do you have a wideband in your car? Im coming from a turbo car, so in that world 11.4 would be ok but I figured that was pretty rich for an N/A car.