Headers without tune? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

dostoyevsky · 10-23-2018, 08:26 PM

Hey guys.... so I got my headers one year ago and since then I've had some financial priority changes...

My question is: if I put the headers on without a tune for 4-5 months, will I be causing engine damage? I've read in the forums that it'll mess with your AFR and is not good, however every single post seems to conflict with the other.

DarkPira7e · 10-23-2018, 08:48 PM

It's really not a good idea. You're also not really going to see any gains if you just put it on without a tune.

Just wait until you can afford it. That's like buying new shoes when you're waiting to get out of a wheelchair

JIM THEO · 10-24-2018, 05:49 AM

OR buy a Tactrix cable and use OFT maps for your call ID/headers.
In every case what you should do is disable P0420 code and if possible scale accordingly your MAF!

86MLR · 10-24-2018, 06:16 AM

I've been running a knocked out cat with a 2017 header for a while now, no issues.

As for codes, I used a 90° minicat, no codes at all.

Playing around with NA isn't as critical as a boosted application.

I will not however mod anything on a boosted vehicle without a tune.

Hell, I've run full exhausts and intakes on some of my new NA cars without tunes, never once had a issue.

I will get a tune for the 86 eventually, just need a couple of days free as my tuner will need the car for at least 2 days to do his thing.

HexBRZ · 10-25-2018, 11:12 AM

Quote:

Originally Posted by dostoyevsky

Hey guys.... so I got my headers one year ago and since then I've had some financial priority changes...

My question is: if I put the headers on without a tune for 4-5 months, will I be causing engine damage? I've read in the forums that it'll mess with your AFR and is not good, however every single post seems to conflict with the other.

Like others have said, it's not a good idea to run headers without telling the comp what to do with it and can cause poor performance and even damage. Get yourself an OFT 2.0 from speedfactory for $500. Comes with preloaded tunes for most mods.

dostoyevsky · 10-25-2018, 01:10 PM

Thanks guys

jflogerzi · 10-28-2018, 08:27 PM

As others have said your ecu is smart enough to adjust just not gonna get really any gains... Grab a used oft tablet on the forums. May I ask what brand of header?

Sent from my ONEPLUS A5010 using Tapatalk

dostoyevsky · 10-31-2018, 06:31 PM

Quote:

Originally Posted by jflogerzi

As others have said your ecu is smart enough to adjust just not gonna get really any gains... Grab a used oft tablet on the forums. May I ask what brand of header?

Sent from my ONEPLUS A5010 using Tapatalk

Gruppe-s

CatDaddysBBQ · 10-31-2018, 07:50 PM

used OFT go for like 350, just do it and actually reap the benefits of the thing.

guybo · 11-03-2018, 03:57 AM

Assuming it's a catless header- There's ways of getting rid of the P0420, but you'll get 0 gains, so what's the point? Wait until you can get an OFT or some other catless tune.

If the header is catted, yeah throw it on.

USE NEW GASKETS WHEN YOU MOUNT THE NEW HEADER- overpipe gasket too.

SuperTom · 11-06-2018, 08:26 PM

Quote:

Originally Posted by dostoyevsky

Gruppe-s

Gruppe-s uel header and OFT is a great budget combo.

17brzNick · 07-14-2021, 03:10 PM

Just wondering if i get headers and install them, will i be causing damage if i drive without tuning first. It would be driving to my local tuner about 45 minutes away as soon as their installed.

Tcoat · 07-14-2021, 03:18 PM

Quote:

Originally Posted by 17brzNick

Just wondering if i get headers and install them, will i be causing damage if i drive without tuning first. It would be driving to my local tuner about 45 minutes away as soon as their installed.

The car already has a header so the change isn't big enough to worry about. You are safe to drive forever without a tune but you would never get the benefits of the changed header.

jflogerzi · 07-20-2021, 12:43 AM

Just don't drive like an ass hat... You be fine getting to the tuner

Sent from my GM1915 using Tapatalk

10-23-2018, 08:26 PM	#1
dostoyevsky Senior Member Join Date: Feb 2017 Drives: 2017 BRZ Location: Vancouver Posts: 128 Thanks: 1 Thanked 20 Times in 16 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Headers without tune? Hey guys.... so I got my headers one year ago and since then I've had some financial priority changes... My question is: if I put the headers on without a tune for 4-5 months, will I be causing engine damage? I've read in the forums that it'll mess with your AFR and is not good, however every single post seems to conflict with the other.

10-23-2018, 08:48 PM	#2
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,932 Thanks: 3,198 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	It's really not a good idea. You're also not really going to see any gains if you just put it on without a tune. Just wait until you can afford it. That's like buying new shoes when you're waiting to get out of a wheelchair Last edited by DarkPira7e; 10-23-2018 at 08:49 PM. Reason: Better wording

10-24-2018, 06:16 AM	#4
86MLR Senior Member Join Date: Aug 2018 Drives: 2002 VX Commodore SS LS1 Auto Location: Sydney Posts: 2,203 Thanks: 500 Thanked 2,185 Times in 1,111 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	I've been running a knocked out cat with a 2017 header for a while now, no issues. As for codes, I used a 90° minicat, no codes at all. Playing around with NA isn't as critical as a boosted application. I will not however mod anything on a boosted vehicle without a tune. Hell, I've run full exhausts and intakes on some of my new NA cars without tunes, never once had a issue. I will get a tune for the 86 eventually, just need a couple of days free as my tuner will need the car for at least 2 days to do his thing. __________________ Disclaimer: This post represents the official views of the voices in my head at the time of posting. http://www.ft86club.com/forums/showthread.php?t=133311 I'm only here for the biscuits

07-14-2021, 03:10 PM	#12
17brzNick Junior Member Join Date: Jul 2021 Drives: Project 2017 subaru brz Location: Helotes, Tx Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Headers going to tune Just wondering if i get headers and install them, will i be causing damage if i drive without tuning first. It would be driving to my local tuner about 45 minutes away as soon as their installed.

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10-24-2018, 05:49 AM	#3
JIM THEO Senior Member Join Date: Feb 2018 Drives: BRZ 2018 Location: Greece Posts: 495 Thanks: 119 Thanked 135 Times in 95 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	OR buy a Tactrix cable and use OFT maps for your call ID/headers. In every case what you should do is disable P0420 code and if possible scale accordingly your MAF!

10-25-2018, 01:10 PM	#6
dostoyevsky Senior Member Join Date: Feb 2017 Drives: 2017 BRZ Location: Vancouver Posts: 128 Thanks: 1 Thanked 20 Times in 16 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thanks guys

11-03-2018, 03:57 AM	#10
guybo Huge E85 fan! Join Date: May 2016 Drives: 2016 Scion FRS Location: Tampa, FL, USA Posts: 1,850 Thanks: 539 Thanked 1,010 Times in 605 Posts Mentioned: 32 Post(s) Tagged: 0 Thread(s)	Assuming it's a catless header- There's ways of getting rid of the P0420, but you'll get 0 gains, so what's the point? Wait until you can get an OFT or some other catless tune. If the header is catted, yeah throw it on. USE NEW GASKETS WHEN YOU MOUNT THE NEW HEADER- overpipe gasket too.

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