How long to wait after installing headers to flash OFT stage 2? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

TOtS · 06-21-2019, 04:48 PM

Hi

I'm installing carless UEL headers on my BRZ now.

I had OFT Stage 1 flashed for about a week.

Can I flash Stage 2+ tune right after installing the headers or should I wait a bit?

BigTuna · 06-21-2019, 05:51 PM

You can, and should, flash immediately.

Sent from my iPhone using Tapatalk

Westen86 · 06-21-2019, 06:13 PM

Jpembry · 06-21-2019, 06:57 PM

Yea, I flashed mine immediately after install before I ever even started the car

kev0 · 06-22-2019, 12:58 AM

Don't forget to retorque screws after a few heat cycles.

86MLR · 06-22-2019, 01:39 AM

I had mine tuned 5000km after going full decat exhaust.

Not tuning your NA car will not be a issue, without a tune a header and full exhaust is worth maybe 5kw up top, maybe, with a good tune there is another 30kw available.

86MLR · 06-22-2019, 01:45 AM

Quote:

Originally Posted by kev0

Don't forget to retorque screws after a few heat cycles.

Depends on what gaskets you use really.

I've never re-torqued, I only use quality steel gaskets on a head though.

I've never had an exhaust leak.

Grady · 06-22-2019, 12:21 PM

Quote:

Originally Posted by BigTuna

You can, and should, flash immediately.

Sent from my iPhone using Tapatalk

You could even flash right before you install the headers.

Bluefire98 · 06-22-2019, 03:34 PM

Flash er up. After you flash, be sure to let it idle for a couple minutes. Then drive around for 10-20 miles under 4kish for a bit. Avoid wot and just let the ecu relearn all the parameters before you go do some hard driving. You should feel the car slowly get smoother after a bit. And yes, definitely go back to make sure everything is torqued correctly. A friend helped me with mine and when I went to go re-tighten everything, the bolts he did were pretty loose lol. Like cmon. Friends don't let friends have exhuast leaks.

TOtS · 06-22-2019, 03:47 PM

Quote:

Originally Posted by kev0

Don't forget to retorque screws after a few heat cycles.

Quote:

Originally Posted by 86MLR

Depends on what gaskets you use really.

I've never re-torqued, I only use quality steel gaskets on a head though.

I've never had an exhaust leak.

I kept my OEM gaskets on the car. They only had 15,000km on them and looked mint.

TOtS · 06-22-2019, 03:49 PM

Quote:

Originally Posted by Bluefire98

Flash er up. After you flash, be sure to let it idle for a couple minutes. Then drive around for 10-20 miles under 4kish for a bit. Avoid wot and just let the ecu relearn all the parameters before you go do some hard driving. You should feel the car slowly get smoother after a bit. And yes, definitely go back to make sure everything is torqued correctly. A friend helped me with mine and when I went to go re-tighten everything, the bolts he did were pretty loose lol. Like cmon. Friends don't let friends have exhuast leaks.

How can I tell if/when I have a leak?

Bluefire98 · 06-22-2019, 11:36 PM

Usually by sound. Sometimes you can smell one considering it's before the 2nd cat.

TOtS · 06-30-2019, 08:36 AM

Quote:

Originally Posted by Bluefire98

Usually by sound. Sometimes you can smell one considering it's before the 2nd cat.

It does smell bad, I can't keep the car on and stand outside anymore. It also sounds different. But I'm not sure what's normal and what's not

AFAIK cat less headers do smell more and sound different.

I'll take it back to the shop to get it checked just to be sure.

CSPTK · 07-01-2019, 03:03 PM

Quote:

Originally Posted by TOtS

How can I tell if/when I have a leak?

Easiest way is to check all connections right after a cold startup on a cold morning. Look for steam/leak at manifolds and all exhaust seams. Leave it on jackstands overnight so you can scoot under car right after you start it. You can even feel (obviously dont touch, more of get your hands close to the joints) the seams with your hands for a couple minutes before it gets too hot.

Stay clear of belts/pulleys/fan.

06-21-2019, 04:48 PM	#1
TOtS Member Join Date: Jun 2019 Drives: 2018 BRZ tS Location: Canada Posts: 33 Thanks: 27 Thanked 4 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	How long to wait after installing headers to flash OFT stage 2? Hi I'm installing carless UEL headers on my BRZ now. I had OFT Stage 1 flashed for about a week. Can I flash Stage 2+ tune right after installing the headers or should I wait a bit?

06-21-2019, 05:51 PM	#2
BigTuna Senior Member Join Date: Jun 2015 Drives: 2013 WRB BRZ Location: Ohio Posts: 672 Thanks: 258 Thanked 477 Times in 275 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	You can, and should, flash immediately. Sent from my iPhone using Tapatalk __________________ 2013 WRB "Build" Thread

06-22-2019, 01:39 AM	#6
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 had mine tuned 5000km after going full decat exhaust. Not tuning your NA car will not be a issue, without a tune a header and full exhaust is worth maybe 5kw up top, maybe, with a good tune there is another 30kw available. __________________ 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

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Jpembry Member Join Date: Dec 2018 Drives: 2019 Subaru BRZ Series.Gray Location: Jersey City, NJ Posts: 69 Thanks: 1 Thanked 16 Times in 16 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yea, I flashed mine immediately after install before I ever even started the car

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kev0 Senior Member Join Date: Feb 2018 Drives: '14 Location: Midwest Posts: 485 Thanks: 246 Thanked 99 Times in 76 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Don't forget to retorque screws after a few heat cycles.

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