OFT/OFH3 with Perrin 2.75" Intake? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

LaertesSon · 04-13-2016, 01:15 PM

I will be installing the OFH and OFT combo soon, and I was wondering if the OTS tunes will work with anything other than the stock airbox.

It says in the release notes they won't, but I have heard the Perrin 2.75" MAF scaling is not far enough from stock to make a difference.

I'm a tuning noob so excuse my inexperience, but do I need to find a custom tune for Openflash headers + the Perrin intake? And if so, how do I find that?

Thanks!

EDIT: I have read this thread; http://www.ft86club.com/forums/showthread.php?t=64790, but am unsure of how to apply this info. It has an Excel(?) file at the end for 2.75" MAF scale, would I need to apply this in RomRaider to my tune before applying?

Shiv@Openflash · 04-13-2016, 02:14 PM

2.75” is the standard (stock) MAF housing diameter so you shouldn’t *need* to rescale MAF. But you may see some benefit from it of course.

spicyricecake · 04-13-2016, 02:35 PM

Quote:

Originally Posted by Shiv@Openflash

2.75” is the standard (stock) MAF housing diameter so you shouldn’t *need* to rescale MAF. But you may see some benefit from it of course.

Shiv, will the OFH3 overpipe be sold separately by any chance?

Shiv@Openflash · 04-13-2016, 02:49 PM

Quote:

Originally Posted by spicyricecake

Shiv, will the OFH3 overpipe be sold separately by any chance?

Hi,
The OFH3 overripe is not modular. It connects to the OFH manifold (and only to the OFH manifold) using a slip joint and clamp. So it cannot used with another other header (OFH/OFH2 included).

LaertesSon · 04-13-2016, 06:04 PM

Quote:

Originally Posted by spicyricecake

Shiv, will the OFH3 overpipe be sold separately by any chance?

The OFH3 overpipe "makes slightly more power due to eliminating the restriction in the kinked factory over-pipe."
I would guess you could get one from a different manufacturer as well that would do this.

phrosty · 04-13-2016, 07:18 PM

Perrin's 2.75" intake actually runs very slightly rich on the stock MAF calibration until LTFT kicks in, so it's quite safe.

04-13-2016, 01:15 PM	#1
LaertesSon Member Join Date: Jan 2014 Drives: Asphalt 2013 FR-S 6MT Location: Atlanta, Georgia Posts: 50 Thanks: 36 Thanked 14 Times in 12 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	OFT/OFH3 with Perrin 2.75" Intake? I will be installing the OFH and OFT combo soon, and I was wondering if the OTS tunes will work with anything other than the stock airbox. It says in the release notes they won't, but I have heard the Perrin 2.75" MAF scaling is not far enough from stock to make a difference. I'm a tuning noob so excuse my inexperience, but do I need to find a custom tune for Openflash headers + the Perrin intake? And if so, how do I find that? Thanks! EDIT: I have read this thread; http://www.ft86club.com/forums/showthread.php?t=64790, but am unsure of how to apply this info. It has an Excel(?) file at the end for 2.75" MAF scale, would I need to apply this in RomRaider to my tune before applying? __________________ OFT Stage 2 tune, OFH, Works AB-M, Perrin 2.75" Intake/Silicone inlet Kartboy Short Shifter, WC Lathewerks knob, MTEC springs TSW Nurburgring, FIVE:AD aero kit, smoked Valenti

04-13-2016, 07:18 PM	#6
phrosty Senior Member Join Date: Apr 2013 Drives: 2013 FR-S Location: Seattle Posts: 806 Thanks: 202 Thanked 320 Times in 199 Posts Mentioned: 18 Post(s) Tagged: 1 Thread(s)	Perrin's 2.75" intake actually runs very slightly rich on the stock MAF calibration until LTFT kicks in, so it's quite safe. __________________ 2013 Whiteout 6AT FR-S \| Perrin Inlet Tube + 2.75" CAI \| OpenFlash Header \| P&L Catback \| 4.88 Final Drive \| Dialed in OFT 2.0x Stage 2 E85 \| 18x8 Enkei Raijin + 225/40 Michelin Pilot Super Sport \| 17x7 Stock + 215/45 Michelin X-Ice Xi-2

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04-13-2016, 02:14 PM	#2
Shiv@Openflash Senior Member Join Date: Sep 2013 Drives: 2013 FRS Location: SF, CA Posts: 2,629 Thanks: 1,055 Thanked 5,469 Times in 1,494 Posts Mentioned: 605 Post(s) Tagged: 9 Thread(s)	2.75” is the standard (stock) MAF housing diameter so you shouldn’t need to rescale MAF. But you may see some benefit from it of course.

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