Welcome to the North American Subaru Impreza Owners Club Wednesday October 22, 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 > Pre-2002 Factory Turbo Powertrain

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 05-22-2004, 04:17 PM   #1
Barticus
Scooby Newbie
 
Member#: 57709
Join Date: Mar 2004
Location: Moscow Idaho
Vehicle:
97 Legacy 2.5 GT
green

Default head bolt tightness

When turboing a NA subaru should the head still be tightened to stock specifications or should it be tightened more for the added psi?
Barticus is offline   Reply With Quote
Old 05-26-2004, 02:36 AM   #2
subiekid
Scooby Guru
 
Member#: 25516
Join Date: Oct 2002
Chapter/Region: NWIC
Location: Send help, stuck in internet!
Vehicle:
1995 Legacy TURBO!!!
EJ22T/TEC3 & '12 Civic

Default

i dont have an answer to your question, but i would try posting in the conversoins forum, more people visit it, this info might even be in there.
subiekid is offline   Reply With Quote
Old 06-19-2004, 12:50 AM   #3
GravelRX
Scooby Newbie
 
Member#: 42392
Join Date: Aug 2003
Location: Roanoke, VA
Default

87 Ea82T goes to 47lb. in steps. If your using a block from a non-turbo car and the compression will be higher I would have the block and heads checked for a baseline. Then maybe go to 50lb. in steps. Good Luck as I'm shooting from the hip with this advice.

Looking for a bit more bottom end are you?

Regards,

Jay
GravelRX is offline   Reply With Quote
Old 07-03-2004, 01:17 AM   #4
sixpack subaru
*** Banned ***
 
Member#: 64974
Join Date: Jun 2004
Location: My Shed, Melbourne, Australia
Vehicle:
1995 WRX,APEXi,HKS,$
Faded, Stonechipped Red

Default

Quote:
Originally posted by GravelRX
87 Ea82T goes to 47lb. in steps. If your using a block from a non-turbo car and the compression will be higher I would have the block and heads checked for a baseline. Then maybe go to 50lb. in steps. Good Luck as I'm shooting from the hip with this advice.

Looking for a bit more bottom end are you?

Regards,

Jay
Hey YA!
The 'Block', or Crank-Case as it is known, does not affect compression, bores and rods are identical. Pistons are what sets the Comp.
Cheers!
sixpack subaru is offline   Reply With Quote
Old 07-03-2004, 01:32 AM   #5
sixpack subaru
*** Banned ***
 
Member#: 64974
Join Date: Jun 2004
Location: My Shed, Melbourne, Australia
Vehicle:
1995 WRX,APEXi,HKS,$
Faded, Stonechipped Red

Default

If you turn the boost up over 9Psi without an intercooler you WILL PULL HEAD BOLTS!!! It happened to me at 11Psi, but I have seen happen with less boost. The best thing you can do for an EA82, (if you are convinced an Eng Conversion isn't your thing), is to replace the factory Dump Pipe with a custom unit.
I used the original DP flange plate and cut it away so as it was just slightly larger than turbo outlet housing, (make sure the gasket doesn't interfere with Gas flow).
This alone gave me 1 PSI more boost (8psi!! ) without any other mods!!! EVEN THE REST OF THE EXHAUST WAS STOCK AT THAT POINT!! I was also annoyed with the inherrant 'Lag' associated with older 'heavier' Turbo's and the 'Spool up time' required as a result of heavy rotating components. To over-come this 'Gear Change Lag' (You can actually hear the Wastegate on gearchanges!), I fitted a dual stage BOV that gave me about 1000rpm at gearchange. Eng management was next, Ait intake, Intercooler-(Old commercial Aircon Evaporator Core Tigged and resin filled), relocation of 'compact type spare wheel(Turbo Only) and battery, (to facilitate 12 litre Intercooler water spray) to boot. 85 mm Throttle Body, 'Bored' Injector Nozzles and Two Days on the Dyno.
1st Run this Car pulled 12.8sec400m Time!!
I used to have great fun showing up WRX's, BMW's, Porsches etc.
I had previously fitted a Vortex 'Push Button 4WD' Manual in place of the OEM Auto. This was the only part of the vehicle I did not rebuild as it came from low milage Jap import. This was also the item that failed, (REVERSING IN A CARPARK! )
causing the Crownwheel to 'Stick it's head out and have a look'.
The result was 3.2 Litres of GearOil on the Road, and some Crownwheel/Pinion Pieces here and there. I have since sold it to a 'Younger Version of Me' and Moved up to a WRX....another story perhaps..........

Sorry to keep on dribbling, I just love the little Buggers.....



Cheers
sixpack subaru is offline   Reply With Quote
Old 07-04-2004, 09:56 PM   #6
WJM
Guest
 
Member#: 0
Default

I am running 60 ft-lbs of TQ on my factory heads and engine. Its an experiement with a new sealing compound to be used with Non-OE turbo headgaskets.....which those fail, while the OE ones from SUBARU do not.

So far, 6k miles of hard foot to floor WOT fun and no failures. Got the engine REALLY HOT and no blown HG either.
  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
ARP head studs V's OEM sti head bolts bugeyes Built Motor Discussion 84 06-01-2014 09:23 PM
WTB: ej257 gasket kit, ARP head bolts and case bolts 69_Lex Private 'Wanted' Classifieds 3 02-20-2008 10:38 AM
Can I reuse block bolts/head bolts Tattoo Collector Normally Aspirated Powertrain 19 01-22-2005 01:35 AM
Head bolt tightness Barticus Subaru Conversions 2 05-27-2004 12:00 PM
Head Bolts & Cams Bolts Torque Specs Imprezd Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 03-20-2003 07:30 AM


All times are GMT -4. The time now is 09:18 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.