Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Subaru Models > Impreza Forum

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 02-17-2022, 07:25 AM   #1
Abid.STI2003
Scooby Newbie
 
Member#: 528882
Join Date: Feb 2022
Default Sti 2003

Hello guys
Last weekend during pull with my sti 2003 fully built engine gtx28 the car shoutoff and wont start so i took it to the garage we opened the engine and we see that it melted piston cylinder 1 . But what can cause a piston to melt if my AFR was 11.2-11.3 (wideband) i run 98ron with meth injection and the meth work 100% i have manley rods manley 92.5 pistons BC cams 272 bc valves bc retiners bc valves and springs id 1050x injectors .
I want to rebuilt the engine but i want to know what can cause this .
Thank you
* Registered users of the site do not see these ads.
Abid.STI2003 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-17-2022, 09:39 AM   #2
K3rm1tth3fr0g
Scooby Specialist
 
Member#: 508105
Join Date: Nov 2019
Chapter/Region: NWIC
Location: Greater Seattle Area
Vehicle:
Link G4X flex tuned
02' EJ205 20G 6MT wagon

Default

Well it's it's melted it means you likely leaned out, or maybe an injector broke all together

Wideband measures all of the cylinders together. So it's possible one cylinder was super lean while the rest were fine, and your tuner didn't pick it up on the dyno with only one WB.

If you want as accurate fueling as possible, you should to add individual widebands on each of your header's runners, as well as a MAP sensor for backpressure correction.

On my Link ECU, adding 4 widebands is fairly easy with the Link adapter, but depending on what engine management you're using, it can be more complicated.

Talk to your tuner - also see what they think as for why the motor failed. Did they build it too?
K3rm1tth3fr0g 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

All times are GMT -4. The time now is 07:21 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.