PERRIN 3" BIG MAF CAI - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Darkparadox911 · 06-15-2015, 12:43 AM

Hey guys, had anyone installed the big 3" cold air intake on their 86, which requires a tune( rescaling the MAF) to be precise. I'm not familiar with tuning and whatnot and have been getting great help from the forum members on how to rescale this. I ordered the OFT From Vishnu and am awaiting that now. As soon as I receive it, I will install my 3" CAI, then Plug my OFT and read it to my ECU, then use my laptop to adjust the scaling given by Perrin. Then Write it using the proper stage of course, which in my case would be EL header stage 2. Does this seem about right or am I missing something? Should I read my ECU Before or after I install my 3" CAI?

steve99 · 06-15-2015, 12:50 AM

Quote:

Originally Posted by Darkparadox911

Hey guys, had anyone installed the big 3" cold air intake on their 86, which requires a tune( rescaling the MAF) to be precise. I'm not familiar with tuning and whatnot and have been getting great help from the forum members on how to rescale this. I ordered the OFT From Vishnu and am awaiting that now. As soon as I receive it, I will install my 3" CAI, then Plug my OFT and read it to my ECU, then use my laptop to adjust the scaling given by Perrin. Then Write it using the proper stage of course, which in my case would be EL header stage 2. Does this seem about right or am I missing something? Should I read my ECU Before or after I install my 3" CAI?

With the oft reading the stock rom file is how you marry the oft to your car. Your just reading the stock tune into the oft which can be written back any time you like. Any variable parameters like learned fuel trims or knock correction IAM values are set back to default\cleared each time you flash a tune or reset ecu, eg disconnect battery..

The perrin 3" maf definitly requires the custom scaling supploed by perrin else car will drive like crap and may run lean at high rpm.

Darkparadox911 · 06-15-2015, 12:56 AM

Thank you so much brother. So I will read my stock tune and then change my scaling and write the new tune

Darkparadox911 · 06-15-2015, 10:22 PM

Ok and last ?, if I tuned my car to Stage 2 EL headers and didn't install my 3" Perrin yet can I always do that later and just scale the MAF to handle the 3"?

Jakevincent · 01-28-2017, 03:16 PM

I also have this intake and need the codes from Perrin! Could you share these codes for the tuning?

1GiantTurtle · 01-29-2017, 09:51 PM

Quote:

Originally Posted by Jakevincent

I also have this intake and need the codes from Perrin! Could you share these codes for the tuning?

its on their website

1GiantTurtle · 01-29-2017, 09:53 PM

Quote:

Originally Posted by Darkparadox911

Ok and last ?, if I tuned my car to Stage 2 EL headers and didn't install my 3" Perrin yet can I always do that later and just scale the MAF to handle the 3"?

yup, if you need help i can plug in the number for you

06-15-2015, 12:43 AM	#1
Darkparadox911 Member Join Date: May 2015 Drives: 2015 Subaru BRZ Pearl White 6MT Location: North Hollywood Posts: 63 Thanks: 46 Thanked 10 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	PERRIN 3" BIG MAF CAI Hey guys, had anyone installed the big 3" cold air intake on their 86, which requires a tune( rescaling the MAF) to be precise. I'm not familiar with tuning and whatnot and have been getting great help from the forum members on how to rescale this. I ordered the OFT From Vishnu and am awaiting that now. As soon as I receive it, I will install my 3" CAI, then Plug my OFT and read it to my ECU, then use my laptop to adjust the scaling given by Perrin. Then Write it using the proper stage of course, which in my case would be EL header stage 2. Does this seem about right or am I missing something? Should I read my ECU Before or after I install my 3" CAI?

01-28-2017, 03:16 PM	#5
Jakevincent Junior Member Join Date: Apr 2015 Drives: Black frs Location: Tennesse Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Perrin intake on OFT I also have this intake and need the codes from Perrin! Could you share these codes for the tuning?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
3" Perrin Resonated Cat-back w/ 3" Nameless Catted Downpipe	Kevstra	Engine, Exhaust, Transmission	28	05-20-2016 08:38 PM
FS: Perrin CAI, & Perrin 2.5" resonated exhaust (NC)	sonnydelight	Engine, Exhaust, Bolt-Ons	9	06-08-2015 11:09 AM
DIY "Grimspeed/Perrin" license plate relocation	BMHumanic	Cosmetic Modification (Interior/Exterior/Lighting)	3	02-05-2015 12:44 PM
Perrin intake tube "worth it"?	ANTLAY	Engine, Exhaust, Transmission	60	10-11-2014 06:41 PM

06-15-2015, 12:56 AM	#3
Darkparadox911 Member Join Date: May 2015 Drives: 2015 Subaru BRZ Pearl White 6MT Location: North Hollywood Posts: 63 Thanks: 46 Thanked 10 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thank you so much brother. So I will read my stock tune and then change my scaling and write the new tune

06-15-2015, 10:22 PM	#4
Darkparadox911 Member Join Date: May 2015 Drives: 2015 Subaru BRZ Pearl White 6MT Location: North Hollywood Posts: 63 Thanks: 46 Thanked 10 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Ok and last ?, if I tuned my car to Stage 2 EL headers and didn't install my 3" Perrin yet can I always do that later and just scale the MAF to handle the 3"?

User Name		Remember Me?
Password