95,066 8,153,557click here to join ScoobyNet, FREE!
 
 
  Subaru forum > Technical / Subaru Modifications > General Technical
User Name
Password

Join our forum Search Mark Forums Read
General Technical General Technical Discussion

Welcome to ScoobyNet.com!
Subaru forum

Welcome to the ScoobyNet.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, at no cost, 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 contact us.

 
 
Reply
 
Old 18 August 2008, 16:48
catalunya 172
scooby spanner monkey
Join Date: Apr 2006
Location: IN THE RHONDDA BUILDING MY FORGED 2.5
Posts: 1,209
This is my Scooby.  To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
Click here to see my Plus Profile, and Guestbook
Default drop in pistons or rebore ??????

i have a 2.5 semi closed block from a '04 - '06 USDM Sti and has done around 30,000
the thing is i will be getting a new crank with acl bearings and will also be getting forged pistons and rods ect.. but should i get over size pistons or drop in ones ?? as the bores look fine and still have cross hatching down them and have very little wear any help or advice would be great

catalunya 172 has started building his forged 2.5 on the project section
catalunya 172 is offline Add Infraction for catalunya 172  
this post is currently rated :   OK ?  
Reply With Quote
Old 18 August 2008, 18:33
merlin24
Scooby Regular
Join Date: May 2006
Location: CARBON FOOTPRINT - MY ARSE!!
Posts: 1,008
Default

Aftermarket Forged pistons generally run a larger piston/bore clearance than the standard subaru cast/forged HF pistons,so will need honing to get the correct clearance anyway.
You need to measure the bores for wear/taper/ovality and base your piston choice on the results.

Mick
merlin24 is offline Add Infraction for merlin24  
this post is currently rated :   OK ?  
Reply With Quote
Old 18 August 2008, 21:51
catalunya 172
scooby spanner monkey
Join Date: Apr 2006
Location: IN THE RHONDDA BUILDING MY FORGED 2.5
Posts: 1,209
This is my Scooby.  To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
Click here to see my Plus Profile, and Guestbook
Default

thanks fella so what ever happens they still need to be horned again?

catalunya 172 has started building his forged 2.5 on the project section
catalunya 172 is offline Add Infraction for catalunya 172  
this post is currently rated :   OK ?  
Reply With Quote
Old 18 August 2008, 23:19
merlin24
Scooby Regular
Join Date: May 2006
Location: CARBON FOOTPRINT - MY ARSE!!
Posts: 1,008
Default

In a nutshell - Yes.
merlin24 is offline Add Infraction for merlin24  
this post is currently rated :   OK ?  
Reply With Quote
Old 19 August 2008, 10:06
E_M_B
Scooby Regular
Join Date: Nov 2006
Posts: 872
Default

As above, you need to go for hone to fit pistons.

If it were a brand new short motor, you could have gone for drop ins...
E_M_B is offline Add Infraction for E_M_B  
this post is currently rated :   OK ?  
Reply With Quote
Old 19 August 2008, 10:08
banny sti
Scooby Senior
Join Date: Oct 2004
Location: Pennine Subaru 01422845007 and Lateral Performance
Posts: 5,427
View My Scooby
Default

As above go for the safe option and use hone to fit pistons.

Banny
banny sti is offline Add Infraction for banny sti  
this post is currently rated :   OK ?  
Reply With Quote
Old 19 August 2008, 15:36
catalunya 172
scooby spanner monkey
Join Date: Apr 2006
Location: IN THE RHONDDA BUILDING MY FORGED 2.5
Posts: 1,209
This is my Scooby.  To set up your own Scooby, go to your user cp, and click 'Edit Settings'.
Click here to see my Plus Profile, and Guestbook
Default

thanks fellas

catalunya 172 has started building his forged 2.5 on the project section
catalunya 172 is offline Add Infraction for catalunya 172  
this post is currently rated :   OK ?  
Reply With Quote
Reply


Thread Tools


 
 

All times are GMT +1. The time now is 05:13.


Important - Opinions expressed are not necessarily the opinions of ScoobyNet or any individuals directly or indirectly involved in this website or the companies and individuals associated with it. No responsibility is taken or assumed for any comments or statements made on this or any associated or relating bulletin board. Your personal information will be kept private except to comply with applicable laws or valid legal reasons.
LinkBacks Enabled by vBSEO 3.2.0 © 2008, Crawlability, Inc.