Welcome to the North American Subaru Impreza Owners Club Tuesday December 7, 2021
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Normally Aspirated with bolt-on Forced Induction 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.







* 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 10-09-2014, 10:29 PM   #51
rustylegasy5787
Scooby Newbie
 
Member#: 379621
Join Date: Jan 2014
Chapter/Region: Tri-State
Location: Pittstion. zip.18640
Vehicle:
1995 legasy
green with a black roof

Default what year was the car

Quote:
Originally Posted by sense of nature View Post
^ This , I have done a 255 case w/ Sti internals, N.A heads & ran over 20 P.S.I. The cams kinda choke after 5 k tho
what year was the car and what kind of computer did you use .i wnt to do this same build i have a td04 sti top mount intercooler.2004 fxt block and piston rods and crank i was gonna pull sum heads off of a 98 wagon i found in my buddies junk yard have them port and polished triple cut valves slap them on and drop it in wit a few littil gauges boost gauge air fuel gauge oil pressure gauge fuel pressure regulator and the blow off valve what else do I need not looking to run a hole lot of boost 10 psi at moste .thank you im gonna keep reading this form
* Registered users of the site do not see these ads.
rustylegasy5787 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 10-09-2014, 10:48 PM   #52
rustylegasy5787
Scooby Newbie
 
Member#: 379621
Join Date: Jan 2014
Chapter/Region: Tri-State
Location: Pittstion. zip.18640
Vehicle:
1995 legasy
green with a black roof

Default

this is the most helpful thread for my build that I'm doing the 257 with the 2.5d heads and the 25 D intake
rustylegasy5787 is offline   Reply With Quote
Old 10-10-2014, 08:03 PM   #53
no694terry
Scooby Specialist
 
Member#: 220816
Join Date: Aug 2009
Location: Pittsburgh PA
Vehicle:
2018 Exotruck
EJ22e 415whp/398wtq

Default

I run 19psi on ej25d hla heads. I have 97 cams in them, they have the offset exhaust lobes. My power curve is pointed towards the moon when i hitvthe rev limiter. I would think the heads are good for 7k. I think the ej25d cams may even be identical to ej20k cams. But dont quote me
no694terry is online now   Reply With Quote
Old 10-13-2014, 10:52 PM   #54
99obsport
Scooby Newbie
 
Member#: 403878
Join Date: Oct 2014
Default

I remember reading the same thing about the ej25d heads being identical to the ej20k heads; can't claim it to be fact as this is a vague memory from when I was researching a hybrid build. But there is a difference in stock redline between the 2 if my memory serves me right. Isn't the 20k stock redline 8k?
99obsport is offline   Reply With Quote
Old 10-13-2014, 10:54 PM   #55
99obsport
Scooby Newbie
 
Member#: 403878
Join Date: Oct 2014
Default

Or is it 7500? Been a while since I researched all this.
99obsport is offline   Reply With Quote
Old 10-15-2014, 12:32 AM   #56
08impreza2.5isport
Scooby Newbie
 
Member#: 369847
Join Date: Oct 2013
Location: Toronto, Canada
Vehicle:
2007 Legacy Spec.B
DGM

Default

There were 2 ej20k's, one shim over bucket and one shim under bucket. STI was the shim under bucket and wrx was the shim over bucket I believe. From what I remember, the wrx ej20k was just an updated ej20g. The wrx ej20k had a 7500rpm redline and STI ej20k was 8000rpm. Ej25d cams are very similar to ej20g cams and I believe the head casting is closer to the wrx ej20k.
08impreza2.5isport is offline   Reply With Quote
Old 10-16-2014, 09:15 AM   #57
no694terry
Scooby Specialist
 
Member#: 220816
Join Date: Aug 2009
Location: Pittsburgh PA
Vehicle:
2018 Exotruck
EJ22e 415whp/398wtq

Default

Here's a log from this mornign with my stock ej25d heads and stock 95 ej22e block. I switched to boost-thru MAf the other day and have been loving it. I used to get a lot of boost taper because of my IAC. Now I'm peaking at 20.2 psi and only taper to low 19's. This 4th into 5th gear and my rev limiter is 6250 so I try and shift before 6, but you can see its showing no sign of letting up on flow up top. My work PC doesnt play well with the window so from the top

Green = Throttle %
Dark Blue = Duty Cyle %
Light Blue = MAFv
Red = RPM
Yellow = timing
Pink = AFR

no694terry is online now   Reply With Quote
Old 03-06-2020, 03:10 PM   #58
Nelson Veloso
Scooby Newbie
 
Member#: 455548
Join Date: Sep 2016
Default

I am sorry my english skills are bad.
In short, is it possible to use pistons and connecting rods of the ej255 or ej257 engines on the ej25D?

Do you need any adaptation? Which joint to use?

My Ej25D is from the second phase and I would like to leave it with 300hp.
Nelson Veloso is offline   Reply With Quote
Old 03-06-2020, 04:55 PM   #59
no694terry
Scooby Specialist
 
Member#: 220816
Join Date: Aug 2009
Location: Pittsburgh PA
Vehicle:
2018 Exotruck
EJ22e 415whp/398wtq

Default

Quote:
Originally Posted by Nelson Veloso View Post
I am sorry my english skills are bad.
In short, is it possible to use pistons and connecting rods of the ej255 or ej257 engines on the ej25D?

Do you need any adaptation? Which joint to use?

My Ej25D is from the second phase and I would like to leave it with 300hp.
bad thread to ask but if you ej25D is phase 2, is it a Ej254? in the US we didnt get DOHC Ej25 past 99 except for the Ej255 and Ej257, both turbo

In 99, Some Legacies here had a Ej25D with a phase 2 block and Phase 1 heads. That motor you can possible put ej255 rods in, all previous EJ25D motors had smaller crank rod journals and a #3 thrust bearing. While it's possible to throw a Phase 2 crank into a phase 1 motor, it's not ideal
no694terry is online now   Reply With Quote
Old 10-05-2021, 05:10 PM   #60
SoCoNoHa
Scooby Newbie
 
Member#: 478524
Join Date: Nov 2017
Chapter/Region: NESIC
Location: Southern NH
Vehicle:
1995 EZ30 Coupe
Green

Default

'99 EJ25D heads, 97(?) EJ22E stock block, ~17 PSI from a TD04... She effin' loved it. I was limited to 6200, so it kept pulling hard till redline. I've read the cams die off hard after 6500, and that's where the 20g/20k cams come in. I was never able to find any...

Whoops, forgot to check the date

Last edited by SoCoNoHa; 10-05-2021 at 05:56 PM.
SoCoNoHa 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
Boost pressure starting at -20 psi, peaking at 5 psi...whats wrong? prophet03 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 8 01-21-2010 08:26 PM
No boost over 20 PSI rainmanjam Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 11 10-10-2005 08:23 PM
Boost spike all the way to 20 psi heavyDOODIE Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 8 12-12-2004 05:09 PM
Autometer Z-Series, Boost/Vacuum, 30 in. Hg/20 psi., 2 1/16 Mechanical Boost Gauge lstepnio Private 'For Sale' Classifieds 2 12-12-2004 12:11 PM
20 psi overboost on stock boost controller EricB Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 4 05-21-2002 11:52 AM

All times are GMT -4. The time now is 08:42 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.