Welcome to the North American Subaru Impreza Owners Club Friday November 17, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Technical > Built Motor Discussion

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 08-03-2008, 05:38 AM   #1
Scooby Newbie
Member#: 173614
Join Date: Mar 2008
Chapter/Region: SCIC
Location: California
2007 STI

Default Sleeve vs Bore the ej257 which one is better?

I am wondering i should bore or sleeve my short block for my 07 sti? cuz right now my cylinder was little bit scratch due to one of the piston cracked. If in case of bore my cylinder, do i really need to have a oversize piston if my engine only have 9000 miles on it? cuz i bought a set of standard size piston. is it possible to keep using standard size piston after bore
* Registered users of the site do not see these ads.
Jimmy168 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-03-2008, 01:26 PM   #2
Scooby Guru
Member#: 64673
Join Date: Jun 2004
Chapter/Region: NWIC
Location: portland
1990 Legacy wagon
goes 12.387 @ 116.5


How bad a scratch? Thats the question. And it has too be REALLY bad not to be able to bore out. Sleeving is out of the question, totally not needed.

Often you can hone a scratch out and still use stock size pistons. You really need to just take it to a machine shop and have them inspect it.
reddevil is offline   Reply With Quote
Old 08-03-2008, 07:50 PM   #3
Scooby Specialist
Member#: 159738
Join Date: Sep 2007
Chapter/Region: SCIC
Location: SGV
2004 WRB STi 620awhp


Just buy 100mm pistons send it in to the machinist to properly bore the block to the correct p/w clearances. Make sure they check for the deck straightness and ra surface of 20 or better.
methaddict is offline   Reply With Quote

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
Turbo manifold, Tomei vs HKS which one is better? Jimmy168 Newbies & FAQs 6 05-04-2008 03:13 AM
Short ram intake VS PDM/GANZ flow intake & K&N filter, which one is better? anonymous_wolf Normally Aspirated Powertrain 4 03-21-2005 08:13 PM
vf 23 vs vf 24 which one is better teamslow wrx Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 1 08-15-2003 01:57 AM
Apex'i N1 or 5zigen Fireball exhaust, which one is better? PhilWanted Normally Aspirated Powertrain 5 04-09-2001 06:17 PM
Which one is better? Miracle Worker Mid Atlantic Impreza Club -- MAIC 9 12-08-2000 02:31 PM

All times are GMT -4. The time now is 06:23 PM.

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