Welcome to the North American Subaru Impreza Owners Club Saturday December 20, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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 > Engine Management & Tuning > UTEC

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 03-26-2006, 12:54 AM   #1
blubaru2002
Scooby Newbie
 
Member#: 104883
Join Date: Jan 2006
Location: Jacksonville Fl.
Vehicle:
2002 wrx sedan
wrc blue

Default Utec and WOT Knock light

I have Utec and during wide open throttle my cel light flashes. i know this is because my engine is knocking.

My OEM boost gauge says i pull .13 kPa in fifth. i think that is roughly 19psi or more. I think my car can boost higher than this but i let off the throttle early when i realized just how high i was boosting.

My question is do i need to get a protune or can i just turn the boost down with my manual boost controller in order to end the engine knock.

My mbc is completely open.

mod list:
turboxs tbe catless
vibrant header and uppipe
turboxs high performance manual boost controller
turboxs UTEC
spt lightweight crank and alternator pulley
throttle body P&P and bypass mod
P&P tdo4
aem custom shortram
* Registered users of the site do not see these ads.
blubaru2002 is offline   Reply With Quote
Old 03-26-2006, 03:03 AM   #2
testes1010
Scooby Specialist
 
Member#: 47145
Join Date: Nov 2003
Chapter/Region: MWSOC
Location: Henderson, KY
Vehicle:
2012 Gas Saver

Default

.13 mPa not .13 kPa...big difference...

get rid of the AEM short Ram & turn down the boost until you get a Protune...none of the TurboXS base maps are designed for 19psi...turn it down to ~16psi otherwise you'll soon need a new shortblock... knocking is bad...
testes1010 is offline   Reply With Quote
Old 03-26-2006, 03:22 AM   #3
jackblaha
Scooby Newbie
 
Member#: 69531
Join Date: Sep 2004
Chapter/Region: SWIC
Location: Austin, TX
Vehicle:
03 WRX Wagon
Silver

Default

I agree with taking off the short ram...too much heat under the hood that you are sucking in. I did and it is much happier. Also agree with turning down the boost until you tune; that knock is going to kill your engine over time.

I have similar mods and am running 18.5-19 psi but that is with alky and a bigger TMIC (too be safe)
I forget who made it, but there is a tuning manual for the UTEC out there and you can tune it yourself (get a WBO2 and do a lot of reading first), or get it tuned professionally.

Good luck
jackblaha is offline   Reply With Quote
Old 03-26-2006, 09:07 AM   #4
jigga
Scooby Guru
 
Member#: 9960
Join Date: Sep 2001
Location: in bed...
Vehicle:
2002 Impreza WRX
WRBlue Perl

Default

If I were you, I would pull the short ram AND the utec...

No offence, but you obviously don't seem to have an idea as to how to use the utec, or much about the workings of EM. Your current ECU can run the show on its own right now with the mods you have on the car sans the intake. I would let it do it until you can get to a professional..
jigga is offline   Reply With Quote
Old 03-26-2006, 04:15 PM   #5
Gethin
Scooby Specialist
 
Member#: 2998
Join Date: Nov 2000
Chapter/Region: VIC
Location: BC
Vehicle:
2002 WRX
WRB

Default

and RTFM
Gethin is offline   Reply With Quote
Old 03-26-2006, 05:16 PM   #6
blubaru2002
Scooby Newbie
 
Member#: 104883
Join Date: Jan 2006
Location: Jacksonville Fl.
Vehicle:
2002 wrx sedan
wrc blue

Default

its true that i do not know how to tune my utec. i never said that i did. please keep comments within the topic of answering the d@mn question.

i simply wanted to know if i could turn my boost down on my mbc to stop my car from knocking.

while doing the port and polish to my tdo4 a bolt fell out from the exhaust housing where it connects to the up pipe. this was not a part of the turbo.

therefore i had obstruction causing me to never reach my real full boost. this is why i had my mbc open.

i have my utec on a baseline stg 2 map with my mbc wide open. im simply doing mods to my car before getting a protune and dont want to destroy my engine.

so will turning the boost down to 16 psi keep my engine safe until i get a protune?
blubaru2002 is offline   Reply With Quote
Old 03-26-2006, 05:31 PM   #7
jigga
Scooby Guru
 
Member#: 9960
Join Date: Sep 2001
Location: in bed...
Vehicle:
2002 Impreza WRX
WRBlue Perl

Default

Quote:
Originally Posted by blubaru2002
its true that i do not know how to tune my utec. i never said that i did. please keep comments within the topic of answering the d@mn question.

i simply wanted to know if i could turn my boost down on my mbc to stop my car from knocking.

while doing the port and polish to my tdo4 a bolt fell out from the exhaust housing where it connects to the up pipe. this was not a part of the turbo.

therefore i had obstruction causing me to never reach my real full boost. this is why i had my mbc open.

i have my utec on a baseline stg 2 map with my mbc wide open. im simply doing mods to my car before getting a protune and dont want to destroy my engine.

so will turning the boost down to 16 psi keep my engine safe until i get a protune?

I am keeping comments within the question.... I am only doing you a favour by letting you know. Utec isn't for everyone (or even me for that matter), and can land you in line at your local dealer for a new shortblock if you don't know what you are doing with it. This is why i told you to pull it out. It is easy for other armchair tuners on the forums to give you advice as to what to do, but what you really need is a professional who has experience to check out a log and make a move from there.

You can turn your boost down which is always a safe option.... but you may still have issues with the fueling or timing as well....

Again, I urge you to take the safe route and pull the utec and intake until a professional can tune it and talk you though what you need to do when certain issues arise. Ultimately it is your choice....
jigga is offline   Reply With Quote
Old 03-26-2006, 06:14 PM   #8
Gethin
Scooby Specialist
 
Member#: 2998
Join Date: Nov 2000
Chapter/Region: VIC
Location: BC
Vehicle:
2002 WRX
WRB

Default

You dont need to learn to tune. You need to learn to RTFM as I said above. The psi targets are all in the UTEC manual for your mods. With your setup dont go above 16.5psi tapering to 12psi at redline.

The basemaps are for 93 octane or better. If you run anything lower you need to remove some timing for starters. The boost map needs to be tuned.

Dont use a MBC unless you know what you are doing. IMHO stick to the TurboXS stages i.e. stock boost solenoid with the ABC plumbed in as per manual instructions. If you deviate from this you'd better make sure you understand what you are doing or bye bye engine.

You have lots of mods there like the shortram, pulleys, headers, P&P turbo which deviates from the TurboXS base map setup, so you need to datalog and gently take it from there. The basemaps are for XYZ mods which you dont have.

The only way for you to know what your car is doing is to datalog using logger #1.
Gethin is offline   Reply With Quote
Old 03-26-2006, 07:45 PM   #9
blubaru2002
Scooby Newbie
 
Member#: 104883
Join Date: Jan 2006
Location: Jacksonville Fl.
Vehicle:
2002 wrx sedan
wrc blue

Default

thanx for the info Gethin... im planning on getting protuned sometime this week. Would it be wise for me to replace the mbc with the ABC that came with the Utec prior to the tune or should i just let the tuner make the call? also is there any advantage to the mbc over the ABC for the tuner?
blubaru2002 is offline   Reply With Quote
Old 03-26-2006, 11:44 PM   #10
Gethin
Scooby Specialist
 
Member#: 2998
Join Date: Nov 2000
Chapter/Region: VIC
Location: BC
Vehicle:
2002 WRX
WRB

Default

keep it simple and as close to the stage 2 setup as you can, until you get it tuned. So IMHO use the stock boost solenoid with the ABC fully closed, hopefully you take it to a decent tuner who can handle the shortram for example. Call your tuner and tell them what you have and see what they say. Maybe they'll want the stock aribox back on for example. Good luck
Gethin 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
Stage 1 STi UTEC and knock sensativity Mancini Engine Management & Tuning 14 12-20-2004 04:44 PM
WOT Knock? semabe Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 11-29-2003 02:23 PM
UTEC and knock woes... Black-X Engine Management & Tuning 43 11-15-2003 01:33 PM
Noob UTEC Question Re: Knock and 91Octane Brian Broz Engine Management & Tuning 2 03-01-2003 09:51 PM
UTEC and knock? gossamer_monster Engine Management & Tuning 7 12-20-2002 01:15 PM


All times are GMT -4. The time now is 08:19 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.