Welcome to the North American Subaru Impreza Owners Club Saturday January 20, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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 11-25-2017, 11:13 AM   #1
subarist90
Scooby Newbie
 
Member#: 413562
Join Date: Feb 2015
Default Ej207 with ej257 crankshaft

Any one tried to put ej257 crankshaft with ej207 length rods and stroker pistons with 2mm higher wrist pins ?! And what about the final compression ratio after this combination

EJ207 crankshaft stroke 75 mm

EJ257 crankshaft stroke 79 mm
* Registered users of the site do not see these ads.
subarist90 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 11-25-2017, 02:10 PM   #2
Samurai Jack
Scooby Guru
 
Member#: 21145
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Not in my own time
Vehicle:
2002 Enemy of Aku

Default

The 257 and the 207 rods are the same length. It's the crank stroke that makes the difference.

So, yes, you can put either crank in either motor, depending on what you are trying to achieve.

Typically, you should wind up with a 2.1L stroker.
Samurai Jack is offline   Reply With Quote
Old 11-25-2017, 02:21 PM   #3
jamal
Scooby Guru
 
Member#: 71875
Join Date: Oct 2004
Location: Montana
Default

Yeah, pretty common. Most piston manufacturers make a part to do that.
jamal is offline   Reply With Quote
Old 11-25-2017, 10:19 PM   #4
Titter
Scooby Specialist
 
Member#: 416107
Join Date: Mar 2015
Chapter/Region: International
Location: Ontario, Canada
Vehicle:
2002 WRX Wagon
EJ207 Spec C 4EAT

Default

tomei makes a complete stroker kit using the 257ís 79mm crank
Titter is offline   Reply With Quote
Old 11-26-2017, 07:41 PM   #5
SuperDuper
Scooby Specialist
 
Member#: 131101
Join Date: Nov 2006
Chapter/Region: MAIC
Location: Yorktown, VA
Vehicle:
2004 AW STi

Default Just done did this.

I just got done with my ej207 stroker build. 257 crank with Carrillo Pro-SA rods and Mahle stroker pistons produce an 8:1CR.
SuperDuper is offline   Reply With Quote
Old 11-26-2017, 10:25 PM   #6
Homemade WRX
Scooby Guru
 
Member#: 33782
Join Date: Mar 2003
Chapter/Region: MAIC
Location: Mooresville, NC
Vehicle:
96 3MI Racing LLC
search FIRST, then PM!!!

Default

Quote:
Originally Posted by Titter View Post
tomei makes a complete stroker kit using the 257ís 79mm crank
Don't waste your money on those overpriced JDM kits.

There are a million ways to skin this cat. I just put together my own 2.1 stroker with my 3MI Racing rods and JE pistons for my personal DD/beater. Should be pretty mild with only an EFR 7163
Homemade WRX is offline   Reply With Quote
Old 11-27-2017, 12:01 AM   #7
jamal
Scooby Guru
 
Member#: 71875
Join Date: Oct 2004
Location: Montana
Default

After you say tomei, you have to say it again in a whisper or the jdm spirits will be angry.


I used to do 2.1 strokers all the time. basically anyone with a 2.0 who came in with spun bearings and a trashed crank. Usually with sti rods, which are a little more stout than the 2.0 parts, and mahle 4032 pistons. Pretty inexpensive in the scheme of an engine rebuild and gives a real nice bump in the low end.
jamal is offline   Reply With Quote
Old 11-27-2017, 09:35 AM   #8
Samurai Jack
Scooby Guru
 
Member#: 21145
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Not in my own time
Vehicle:
2002 Enemy of Aku

Default

Quote:
Originally Posted by Homemade WRX View Post
Don't waste your money on those overpriced JDM kits.

There are a million ways to skin this cat. I just put together my own 2.1 stroker with my 3MI Racing rods and JE pistons for my personal DD/beater. Should be pretty mild with only an EFR 7163
$1600 for a complete stroker kit does not seem overly priced:
https://frsport.com/Forged-Full-Coun...SABEgIcivD_BwE

Besides, comparing pricing doesn't count if you already have a lot of the parts.

I know a couple of people who used Tomei kits in their 600 HP 257s and they have had zero issues.
Samurai Jack is offline   Reply With Quote
Old 11-27-2017, 02:29 PM   #9
jamal
Scooby Guru
 
Member#: 71875
Join Date: Oct 2004
Location: Montana
Default

Quote:
Originally Posted by Samurai Jack View Post
$1600 for a complete stroker kit does not seem overly priced:
https://frsport.com/Forged-Full-Coun...SABEgIcivD_BwE

Besides, comparing pricing doesn't count if you already have a lot of the parts.

I know a couple of people who used Tomei kits in their 600 HP 257s and they have had zero issues.
The picture shows rods and pistons (and not even subaru parts), but if you put in an order all you'd get is the crankshaft. The Tomei pistons are another 1500 and the rods are 600 or so.

Stock sti crank, manley h-beams, mahle pistons would come to something like 1300.

Last edited by jamal; 11-27-2017 at 02:39 PM.
jamal is offline   Reply With Quote
Old 11-27-2017, 04:24 PM   #10
Samurai Jack
Scooby Guru
 
Member#: 21145
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Not in my own time
Vehicle:
2002 Enemy of Aku

Default

I was misled by the picture. Silly me.
Samurai Jack is offline   Reply With Quote
Old 11-27-2017, 10:00 PM   #11
Homemade WRX
Scooby Guru
 
Member#: 33782
Join Date: Mar 2003
Chapter/Region: MAIC
Location: Mooresville, NC
Vehicle:
96 3MI Racing LLC
search FIRST, then PM!!!

Default

I would NOT recommend standard Manley H-beams if you want to make fun power or serious low end torque.

If going Manley, at least get the H-tuff rods. That'll put the build closer to the $1400-1500 range but you won't have to worry about folding a rod. Again, not sure of your power goals.
Homemade WRX 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

All times are GMT -4. The time now is 01:53 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.