Welcome to the North American Subaru Impreza Owners Club Tuesday July 29, 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 > 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.
Reply
 
Thread Tools Display Modes
Old 11-24-2006, 03:29 PM   #1
PeteDucati
Scooby Specialist
 
Member#: 44629
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: '04WRX-Axis ej257, IPT 4eat.
Vehicle:
CNC 'd heads, cams
DB18g/EWG - F/S $8K

Default Higher CR w/ StgII cams and CNC'd heads.

As of right now my CR will be right around 8.78:1 (according to this calculator http://www.csgnetwork.com/compcalc.html). One of my heads was warped and required about .008" of milling. My builder thinks I lost about 1cc of chamber volume, which is fine by me. I'm also assuming the deck height will be around .001" less after resurfacing (or .37mm instead of .39mm). Everything will be measured (even the chamber volume) and calculated before final assembly (honest blueprint job). I'm going to keep the milling to a minimum since I don't want to ruin the cam timing, but I'm wondering if I should aim for something more like 8.9:1? It's difficult to calculate how milling will affect the combustion chamber volume. The .25mm I'm willing to mill away (per head) may not make much of a difference.

Supporting mods worth noting:
CP pistons
CNC'd WRX heads (program based on heavily ported v7 heads)
Crower Stage II cams, springs, retainers
td06h-18g
SMC (pure meth) injection with m15 nozzle
38mm EWG
TMIC
headers
no cats

I'm mainly looking for tons of low boost torque but still squeeze high 11's out of this setup.
* Registered users of the site do not see these ads.
PeteDucati 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
NON AVCS cams and EJ257 heads ADJ cam sprockets saintluciascooby Built Motor Discussion 12 01-23-2012 09:12 PM
FS: WRX coil packs, cams and STI head gaskets subalou1 Engine/Power/Exhaust 8 09-25-2009 10:38 PM
2.5L VF39 E85 CAMs and Ported heads VS 2.5L VF39 E85 juanmedina Proven Power Bragging 156 09-05-2009 04:27 AM
Streettuner Cams and Higher Revs greysave AccessPort 9 03-21-2006 03:29 PM
HasCobb's Cams and Cylinder Heads combo for 99 2.5DOHC?? MY99 2.5GT Normally Aspirated Powertrain 4 03-22-2001 02:51 PM


All times are GMT -4. The time now is 12:29 PM.


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.