Welcome to the North American Subaru Impreza Owners Club Monday November 30, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Old 10-22-2015, 03:22 PM   #1
Scooby Newbie
Member#: 363077
Join Date: Jul 2013
Default Tuning for BigMAF

So I picked up a BigMAF locally instead of a standard intake and I made a post about it a few weeks back, a couple people + Perrin chimed in to say it was all good as long as I got tuned for it.

I'm running an XPT "stage 2" map on the car right now with a 3in TBE, Perrin Up-pipe, Perrin turbo inlet and DW200 pump and I've wanted to dip into tuning on the WRXs for a while now (I did a lot with MS2 and my old N/A E30) but, haven't had much of an opportunity. I figured this would be a good opportunity to get my feet wet on the WRX with a component that's really easy to install and remove.

I found a couple threads that suggest a starting scale for the BigMAF due to the increase seen on the MAF not necessarily being linear over the entire voltage/flow range. This scale includes a range that goes over 300g/s after 4.41 volts.

With my current components I have never seen over 240g/s and I've read that even VF cars don't usually pull over 280g/s (ish) so I should never need anything beyond the 300g/s mark for now... Do I start with that scale and in the 4.41-4.69v blocks just place the max 300g/s in the 2D map as a place holder?

I read something about adjusting the injector scaler to trick the ECU a little bit to allow it go higher then 300g/s flow in the 16bit ECU but, I didn't quite understand that process yet.

I also intended to switch back to the factory intake and original XPT map and install the Dark Blue injectors I picked up and figure out injector tuning for that as well and then hopefully combine what I've learned to run both the BigMAF and the Dark Blues on the same modified map when all is said and done... But how does playing with the scaler with stock injectors and BigMAF mess up those plans?

Thoughts? Pointers?

* Registered users of the site do not see these ads.
autoxinvr6 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 09:06 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.