Welcome to the North American Subaru Impreza Owners Club Friday March 29, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > AccessPort

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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 06-16-2007, 12:20 AM   #1
WrxRick
Scooby Specialist
 
Member#: 85761
Join Date: Apr 2005
Chapter/Region: TXIC
Location: Texas
Vehicle:
2005 05' STi
Black

Default Running a crazy tune right now. What should I do?

So, I got my Subaru tuned here in Houston and the tuner said he used 95***37; duty cycle on the stock 550cc injectors. He also messed with the timing. Don't get me wrong, the tune is amazing and I've had it for about 8 months now and the car runs like a champ. My gas mileage is honestly terrible. This was before I knew much about cars, and lately I've just been hanging out with, lets say, a very automotive group and they have told me that 95% duty cycle is the reason for my terrible gas mileage along with the Cobb Protune for 17psi. They also claim that injectors freak out over 90% duty cycle and literally run fuel ALL the time. The only mods I have are a Walbro 255lph fuel pump and Cobb Protune.

So. My friends told me of two solutions for me to take.
The first includes running 650cc injectors so that way they won't be running so hard. I was wondering how you all felt about that?
The second includes just getting another tune from MZM and run closer to stock boost, let's say 15 psi on a protune, so that way I have lower duty cycle and better gas mileage (on the stock injectors).

So. What would you do in my position? (My car needs to last and run very safe for another year before I sell it)

Thank you very much for your suggestions and knowledge,
Patrick
* Registered users of the site do not see these ads.
WrxRick is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 06-16-2007, 12:24 AM   #2
520hpsti
Scooby Specialist
 
Member#: 108965
Join Date: Mar 2006
Chapter/Region: MWSOC
Location: MI
Vehicle:
2005 Subaru WRX STi

Default

how the hell are you running 95***37; idc's with a walbro on the stock turbo @ 17psi is what im wondering.

Either way, it is okay to drive at 95% idc.
520hpsti is offline   Reply With Quote
Old 06-16-2007, 12:29 AM   #3
godfather2112
Papi Chulo
Moderator
 
Member#: 53794
Join Date: Jan 2004
Chapter/Region: RMIC
Location: Boner kill city
Vehicle:
... 2017 BMW M2
2017 F-150

Default

95***37;idc?

hell my buddy with a 18g on his 06wrx stock injectors is only running 80% duty cycle?

You tuner must love using fuel, and not timing.
godfather2112 is offline   Reply With Quote
Old 06-16-2007, 03:32 AM   #4
nhluhr
Scooby Guru
 
Member#: 7327
Join Date: Jun 2001
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2008 Mazdaspeed3
2006 Wrangler Sport

Default

a) your friends don't know what they are talking about
b) neither do you
c) your tuner gave you a nice safe tune. enjoy it.
d) WOT max load duty cycles have nearly nothing to do with your daily fuel economy. you want better mpg? stay off the throttle... same as everybody else.
nhluhr is offline   Reply With Quote
Old 06-16-2007, 10:41 AM   #5
dexterous
Scooby Guru
 
Member#: 23553
Join Date: Aug 2002
Chapter/Region: MAIC
Location: Grove City, PA
Vehicle:
2005 STI - Insanity!
2014 WRX - Daily

Default

Quote:
Originally Posted by nhluhr View Post
a) your friends don't know what they are talking about
b) neither do you
+1
dexterous is offline   Reply With Quote
Old 06-16-2007, 08:12 PM   #6
WrxRick
Scooby Specialist
 
Member#: 85761
Join Date: Apr 2005
Chapter/Region: TXIC
Location: Texas
Vehicle:
2005 05' STi
Black

Default

wow so funny HAHAHAHAHA


jesus you need to be a comedian!!!!!!!!!!!!




Back to topic.
WrxRick is offline   Reply With Quote
Old 06-18-2007, 01:48 PM   #7
FCmaniac
Scooby Specialist
 
Member#: 142029
Join Date: Feb 2007
Chapter/Region: Tri-State
Location: Lehigh Valley, PA
Vehicle:
2013 Forester
2008 350z, 1991 Miata BRG

Default

Quote:
Originally Posted by nhluhr View Post
a) your friends don't know what they are talking about
b) neither do you

FCmaniac is offline   Reply With Quote
Old 06-18-2007, 04:46 PM   #8
nhluhr
Scooby Guru
 
Member#: 7327
Join Date: Jun 2001
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2008 Mazdaspeed3
2006 Wrangler Sport

Default

just to clarify, that wasn't meant as a slam, just a reminder that he is new to this and a basic premise for the advice dispensed in d).
nhluhr is offline   Reply With Quote
Old 06-18-2007, 05:16 PM   #9
Master2192
RIP 10/12/83 to 02/10/08
Scooby Specialist
 
Member#: 83254
Join Date: Mar 2005
Chapter/Region: NWIC
Location: Roy, Washington
Vehicle:
98 2.5 RS
04 WRX

Default

Quote:
Originally Posted by WrxRick
wow so funny HAHAHAHAHA
jesus you need to be a comedian!!!!!!!!!!!!
Back to topic.
Yeah, next time try taking his advice. Your Injector duty are only close to maxing out at FULL THROTTLE near REDLINE. Your friends do not know what they are talking about, period.

My 04 WRX runs 18-19 psi on stock turbo and injectors on my own Stage 2 tune. The car averages 28+mpg because I know how to keep my foot off the floor.

Your car is safe at 17 psi, beyond that is pushing the limits of stock components.
Master2192 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
Thinking of running no exhaust? What should I do? 904scooby Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 39 06-19-2007 04:19 PM
There are no mods in here right now, what can we do?? rice h8r Off-Topic 23 01-19-2007 06:08 AM
Did I **** Up? What should I do to make it right? (long with cliff notes) huckedup16 Off-Topic 39 05-09-2004 02:20 PM
What should I do right now? Reciprocity Off-Topic 7 08-05-2003 11:37 PM
Again I have this crazy idea...what should I do??? Opie South East Region Forum 9 07-06-2001 11:56 PM

All times are GMT -4. The time now is 10:45 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.