Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB
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Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Engine, Exhaust, Transmission (https://www.ft86club.com/forums/forumdisplay.php?f=8)
-   -   Header info for a newbie (https://www.ft86club.com/forums/showthread.php?t=71412)

Foobar 08-07-2014 07:28 PM
If you damage your cat, the shop would usually replace it with OEM equipment, as that's what federal regs call for.

If its an aftermarket piece, you're on your own, they won't touch it.

There's no real functional difference between primary and secondary. Primary is monitored by the ECU, secondary is just a redundant backup. Technically, both are required by federal regulations to remain OEM and intact for the life of the warranty which is 8 years or 80k miles as they are part of the emissions control system.

Sent from my Nexus 5 using Tapatalk

B-R-Z 08-07-2014 09:10 PM
Quote:
Originally Posted by Foobar (Post 1887727)
If you damage your cat, the shop would usually replace it with OEM equipment, as that's what federal regs call for.

If its an aftermarket piece, you're on your own, they won't touch it.

There's no real functional difference between primary and secondary. Primary is monitored by the ECU, secondary is just a redundant backup. Technically, both are required by federal regulations to remain OEM and intact for the life of the warranty which is 8 years or 80k miles as they are part of the emissions control system.

Sent from my Nexus 5 using Tapatalk
I'm mainly trying to a) Not have a CEL and b) Not mess up my car by my ECU trying to correct the air\fuel ratio based on the o2 readings. Maybe I can have the shop cut the factory cat out of my header and put it in my front-pipe? Just kidding (kind of) but I really want to figure this out.

Foobar 08-07-2014 09:52 PM
Quote:
Originally Posted by B-R-Z (Post 1887926)
I'm mainly trying to a) Not have a CEL and b) Not mess up my car by my ECU trying to correct the air\fuel ratio based on the o2 readings. Maybe I can have the shop cut the factory cat out of my header and put it in my front-pipe? Just kidding (kind of) but I really want to figure this out.
I'm not sure what you're trying to avoid - you're going to want to get a tune for the header anyway to maximize the benefit so that should address the ECU and CEL for you.

Are you trying to get by without a tune? If so, you'll need some kind of defouler setup to trick the o2 sensor and avoid CEL. That's a lot less involved than trying to move a cat and sensors around to another part of the exhaust system.

B-R-Z 08-07-2014 09:56 PM
Quote:
Originally Posted by Foobar (Post 1887994)
I'm not sure what you're trying to avoid - you're going to want to get a tune for the header anyway to maximize the benefit so that should address the ECU and CEL for you.

Are you trying to get by without a tune? If so, you'll need some kind of defouler setup to trick the o2 sensor and avoid CEL. That's a lot less involved than trying to move a cat and sensors around to another part of the exhaust system.
I told you what I'm trying to avoid in my previous post. Another member moved his sensors around the secondary and has no cel for 5000+ miles. My only concern is the ecu messing with a/f ratio

Foobar 08-07-2014 09:57 PM
Quote:
Originally Posted by B-R-Z (Post 1888001)
I told you what I'm trying to avoid in my previous post. Another member moved his sensors around the secondary and has no cel for 5000+ miles.
And I'm telling you that a proper tune will handle what you need, so are you tuned or not?

B-R-Z 08-07-2014 09:59 PM
Quote:
Originally Posted by Foobar (Post 1888003)
And I'm telling you that a proper tune will handle what you need, so are you tuned or not?
No tune and no plans to at least until warranty is expired... it just isn't with it to me to spend $500+ on 10hp. The cel can be fixed other ways, and hopefully this ecu correction that I read about on the forums Idk how legit it is

Foobar 08-07-2014 10:02 PM
Quote:
Originally Posted by B-R-Z (Post 1888004)
No tune and no plans to at least until warranty is expired... it just isn't with it to me to spend $500+ on 10hp. The cel can be fixed other ways.
Then yes, in that case you want to move your sensor setup to use the secondary, or take a chance on a defouler which isn't always foolproof.

Sorry for not getting a clear understanding of your situation. Preferably get a tune, next easiest path is defouler, last resort, move the sensor setup to use the secondary and hope the secondary is enough to meet the ECU threshold for keeping CEL in check.

I don't have experience with that so I'm afraid I can't really add more to this.

B-R-Z 08-07-2014 10:08 PM
I'm guessing the secondary is better than using a mini-cat or o2 extender piece. Is that what you mean by defouler?

And as I said, another member has been using the secondary for a while with success

grodenglaive 08-07-2014 10:35 PM
Quote:
Originally Posted by FatFree (Post 1880595)
So I'm interested in getting an aftermarket header for my frs but I have a few questions.

My first concern is that when I look up headers for my frs they say that they are for off-road use only. Why is this? Will I risk the chance of getting pulled over and ticketed because of an aftermarket header?

Also, are there any concerns with the reliability of aftermarket headers? Will I have to worry about anything breaking down?

I'd ultimately like to get a header and an open flash tablet to increase my horsepower. Are there any other problems that could come with installing an aftermarket header? Thanks!
Or you could avoid all these problems and get the P&L catted header (or the one by FT86-speedfactory). It makes power, it isn't loud so you won't get pulled over, it won't throw any CELs - even without a tune, and you will pass your e-test. WIN-WIN-WIN. Combine that with the openflash tablet and you're golden.
:party0030:

GotBRZ1691 08-07-2014 10:43 PM
Open FLash Tablet with Open Flash header for a Grand, awesome deal. You get the part and it does more than make sound. And I believe you will see closer to 20 hps with Shivs Tune

B-R-Z 08-07-2014 10:57 PM
A grand for a header, no thanks. And I heard people were still getting cel's with the ft86speedfactory header.

Target70 08-07-2014 11:09 PM
no, a grand for a header and a tuning tablet/data logger + tunes

also, If you wouldn't spend $500 for 10hp, then why bother with a header? A header without a tune will cost more than $500, and will not net you more than about 10hp n/a

B-R-Z 08-07-2014 11:41 PM
Quote:
Originally Posted by Target70 (Post 1888104)
no, a grand for a header and a tuning tablet/data logger + tunes

also, If you wouldn't spend $500 for 10hp, then why bother with a header? A header without a tune will cost more than $500, and will not net you more than about 10hp n/a
I don't really want a tune, my goal with this car is not squeezing out little bits of NA power. I paid $380 for my UEL for the rumbles.. Hate all you want.

Target70 08-08-2014 12:23 AM
no hate, just curiosity. noise doesn't really register on my radar, so I honestly couldn't figure why you would get a header.


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