Welcome to the North American Subaru Impreza Owners Club Friday April 20, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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. 
Reply
 
Thread Tools Display Modes
Old 11-13-2002, 12:15 PM   #1
Need4Boost
Scooby Specialist
 
Member#: 15194
Join Date: Feb 2002
Chapter/Region: Tri-State
Location: 1^2 Mile, NJ
Vehicle:
2004 Lightning,
2001 BMW 330ci

Default What do you think about running a UniChip and a S-AFC together?

Currently, I will be having a UniChip mapped for STG4.

Right now, I am only running a S-AFC - Which is why i bought some kind of engine management.

(I put down some terrible numbers with the S-AFC only and too much timing was being pulled.)

My question is, would it be ok to run both units together?

I am going to have the car dynoed with the UniChip, and then use the S-AFC to "fine" tune the car.

Any pros/cons to this? Or do you think I should just sell the S-AFC? Thanks!
* Registered users of the site do not see these ads.
Need4Boost is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 11-13-2002, 12:30 PM   #2
jmott
Scooby Guru
 
Member#: 6713
Join Date: May 2001
Chapter/Region: TXIC
Location: Houston TX USA
Vehicle:
2007 Prius
brown

Default Re: What do you think about running a UniChip and a S-AFC together?

you would end up using the unichip for timing only, and SAFC for fuel.

this would allow you to mess with the air/fuel ratio on your own, but not the timing.

there could be some weird issues using both together. Unless being able to fiddle with the air fuel ratio yourself is of great importance to you, Id sell the SAFC


Quote:
Originally posted by Need4Boost
Currently, I will be having a UniChip mapped for STG4.

Right now, I am only running a S-AFC - Which is why i bought some kind of engine management.

(I put down some terrible numbers with the S-AFC only and too much timing was being pulled.)

My question is, would it be ok to run both units together?

I am going to have the car dynoed with the UniChip, and then use the S-AFC to "fine" tune the car.

Any pros/cons to this? Or do you think I should just sell the S-AFC? Thanks!
jmott is offline   Reply With Quote
Old 11-13-2002, 12:48 PM   #3
NotoriousWRX
Scooby Specialist
 
Member#: 9026
Join Date: Aug 2001
Location: If I knew, I wouldn't be lost!
Default

IMO, you have to go with one or the other. The chip will alter the timing to what the tuner feels it should be, but when you change the AF, you will then cause the timing to be altered from what that tuner intended. The results would not be optimal in any sense and could actually be downright dangerous.

I know that you weren't happy with your dyno results, but you have to realize that they were not really that bad, given the entire set of circumstances under which your car was tuned that day.
NotoriousWRX is offline   Reply With Quote
Old 11-13-2002, 01:01 PM   #4
Need4Boost
Scooby Specialist
 
Member#: 15194
Join Date: Feb 2002
Chapter/Region: Tri-State
Location: 1^2 Mile, NJ
Vehicle:
2004 Lightning,
2001 BMW 330ci

Default

Thanks guys!

Looks like i will be selling the S-AFC soon.
Need4Boost is offline   Reply With Quote
Old 11-13-2002, 01:17 PM   #5
norseone
Scooby Specialist
 
Member#: 16350
Join Date: Mar 2002
Chapter/Region: MAIC
Vehicle:
2015 M3
1971 521

Default SAFC

I was told that people use the SAFC to lean out the car(WRX) which inturn advances the timing. Which then inturn equals bad news.

Does anyone know anything about this? Whether I shoud even use the SAFC on my car. My mods are VF23, TXS turboback, K&N, Profec-B, among other things and now a SAFC. But I am hesitant to put it on because of what I have been told about it. Is there any truth to this? Any help would be appreciated.

TIA

-NORSE
norseone is offline   Reply With Quote
Old 11-13-2002, 01:52 PM   #6
NotoriousWRX
Scooby Specialist
 
Member#: 9026
Join Date: Aug 2001
Location: If I knew, I wouldn't be lost!
Default

If tuned properly, an SAFC can yield good results.




<---------
NotoriousWRX is offline   Reply With Quote
Old 11-13-2002, 02:38 PM   #7
norseone
Scooby Specialist
 
Member#: 16350
Join Date: Mar 2002
Chapter/Region: MAIC
Vehicle:
2015 M3
1971 521

Default

Quote:
Originally posted by NotoriousWRX
If tuned properly, an SAFC can yield good results.




<---------
No engine management besides SAFC? Any help would be appreciated. My local tuner basically said they will not install one on a WRX. Because of the fact that it advances the timing so much.

TIA

-NORSE
norseone is offline   Reply With Quote
Old 11-13-2002, 02:40 PM   #8
Need4Boost
Scooby Specialist
 
Member#: 15194
Join Date: Feb 2002
Chapter/Region: Tri-State
Location: 1^2 Mile, NJ
Vehicle:
2004 Lightning,
2001 BMW 330ci

Default

Quote:
Originally posted by NotoriousWRX
If tuned properly, an SAFC can yield good results.




<---------
^^

Has proved what a properly tuned S-AFC can do. I think you should post some dyno charts.
Need4Boost is offline   Reply With Quote
Old 11-13-2002, 04:26 PM   #9
Z1 Performance
Former Vendor
 
Member#: 9327
Join Date: Aug 2001
Location: Z1Auto.com
Default

Agreed...you MUST know what you are doing. The SAFC only affects timing too greatly if you let it..use it for incremental changes, and it does wonders...we have several 13 and 12 second customer cars with just a SAFC...

Adam
www.z1auto.com
Z1 Performance is offline   Reply With Quote
Old 11-13-2002, 04:45 PM   #10
DJWRX
Scooby Specialist
 
Member#: 10340
Join Date: Sep 2001
Location: Austin, Tx
Vehicle:
2002 WRX
Silver

Default

I ran with a guy who was running both this weekend. He had a turboback, Vishnu stage 1 and an intake. It seemed redundent to me...

Tim
DJWRX is offline   Reply With Quote
Old 11-13-2002, 06:53 PM   #11
NotoriousWRX
Scooby Specialist
 
Member#: 9026
Join Date: Aug 2001
Location: If I knew, I wouldn't be lost!
Default

I have no other engine management. Just an SAFC.

Like Adam wrote, the SAFC will affect timing, but that can be controlled to an extent. You will not have the same level of control as a standalone or chip, because of limitations in resolution. The SAFC has a lot less adjustment points.

I think that any car can produce higher, smoother power using a fully programable EMS, but an SAFC is a good and viable option for those of us that choose to use it. There are other people on here that are making good power and are only using an SAFC as their form of engine management. You just have to understand that there are limitations to what you can do, based on the rest of your entire setup and the SAFC.
NotoriousWRX is offline   Reply With Quote
Old 11-13-2002, 07:01 PM   #12
norseone
Scooby Specialist
 
Member#: 16350
Join Date: Mar 2002
Chapter/Region: MAIC
Vehicle:
2015 M3
1971 521

Default

Quote:
Originally posted by Z1 Performance
Agreed...you MUST know what you are doing. The SAFC only affects timing too greatly if you let it..use it for incremental changes, and it does wonders...we have several 13 and 12 second customer cars with just a SAFC...

Adam
www.z1auto.com
Thanks Adam. It kind of shocked me when the guy said that he would not install it because what it would do to my car. But I know there a lot of people running it here.

I just called them and talked to the other owner and he said no problem. They would install it. Go figure.

So with the VF23, full exhaust, profec-B, and the SAFC I should golden. Should be right around my target HP.

--NORSE

PS Does anyone have any baseline information for the WRX and SAFC?
norseone is offline   Reply With Quote
Old 11-13-2002, 08:58 PM   #13
NotoriousWRX
Scooby Specialist
 
Member#: 9026
Join Date: Aug 2001
Location: If I knew, I wouldn't be lost!
Default

Quote:
Originally posted by norseone
Does anyone have any baseline information for the WRX and SAFC?
There are no baseline settings for the SAFC. They will vary from car to car, even if the cars have the same exact mods. Tuning should only be done by someone who knows what they're doing while using the appropriate monitoring tools.

I suggest that you post in your regional forum to see what tuner(s) other people in your area have used successfully. Good luck.
NotoriousWRX is offline   Reply With Quote
Old 11-13-2002, 10:17 PM   #14
Jon [in CT]
*** Banned ***
 
Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
Vehicle:
02 WRX Sedan
Silver

Default Re: What do you think about running a UniChip and a S-AFC together?

Quote:
Originally posted by Need4Boost
Any pros/cons to this?
I suspect you've already met your fair share of Cons in Jersey (especially if you've shaken hands with a politician ). Why not consult a pro in New Jersey, www.rallispec.com?
Jon [in CT] is offline   Reply With Quote
Old 11-14-2002, 01:30 AM   #15
norseone
Scooby Specialist
 
Member#: 16350
Join Date: Mar 2002
Chapter/Region: MAIC
Vehicle:
2015 M3
1971 521

Default

Quote:
Originally posted by NotoriousWRX


I suggest that you post in your regional forum to see what tuner(s) other people in your area have used successfully. Good luck.
Yeah I hear that but THE tuner here in Salt lake is the one that said that he would not install it. Oh man this is weak.

Thanks though.

NORSE
norseone is offline   Reply With Quote
Old 11-14-2002, 08:54 AM   #16
Need4Boost
Scooby Specialist
 
Member#: 15194
Join Date: Feb 2002
Chapter/Region: Tri-State
Location: 1^2 Mile, NJ
Vehicle:
2004 Lightning,
2001 BMW 330ci

Default Re: Re: What do you think about running a UniChip and a S-AFC together?

Quote:
Originally posted by Jon [in CT]
I suspect you've already met your fair share of Cons in Jersey (especially if you've shaken hands with a politician ). Why not consult a pro in New Jersey, www.rallispec.com?
Please don't remind me. Ugh..

I e-mailed Rallispec and we shall see how that goes. Thanks for the heads up! I forgot about them too.
Need4Boost is offline   Reply With Quote
Reply

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
What do you think of running this lean? akira02rex Commercial ECU Reflashes 18 11-13-2006 09:16 AM
What to go with a crazy set up!!!!!!! What do you think about this. siliversti06 Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 10 07-21-2006 06:03 PM
What do you tip and what do you think about it? sonicsuby Off-Topic 58 10-29-2003 06:16 PM
what do you think ill run? NateDogg Normally Aspirated Powertrain 18 09-17-2001 03:59 AM
what do you think about these rims??? pics!! shinestreetBen Bay Area Impreza Club Forum -- BAIC 3 11-22-2000 04:52 PM

All times are GMT -4. The time now is 08:24 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.