Ej257 with ej207 heads - Subaru WRX Forum
 
LinkBack Thread Tools Display Modes
post #1 of 8 Old 10-20-2009, 02:04 AM Thread Starter
WRXtuners Member
 
Join Date: Sep 2008
Location: Utah
Posts: 33
Drexer13 is an unknown
Ej257 with ej207 heads

I have a friend that is selling the motor out of his sti, it has a spun bearing so itís pretty cheap. Itís coming as a complete long block so I would have the turbo, injectors and sti tmic. I also just found some ej207 heads for a pretty good deal I was wondering if they would mate and if that might be a good combo. I was just thinking that if Iím going to be building the 2.5 anyway I might as well build it to spin up to 8k. Some advice would be great.
Thanks
Drexer13 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 10-20-2009, 07:46 AM
WRXtuners Member
 
basco's Avatar
 
Join Date: Aug 2004
Location: South Carolina
Posts: 1,873
basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to
Send a message via AIM to basco Send a message via MSN to basco
they would mate but why would you want to use them there essentially the same heads with a slightly different cam profile that is more favorable to a two litre.

FP GT35R MoTeC M800 AndrewTech PPG'd Wagon - 513AWHP
06 Mazdaspeed6 280/330
- Matt
basco is offline  
post #3 of 8 Old 10-20-2009, 01:51 PM
WRXtuners Member
 
c2bcoolwrx's Avatar
 
Join Date: Feb 2008
Location: Florida
Posts: 309
c2bcoolwrx is more helpful than not
EJ207 heads are better than EJ205 heads. But, if your going to get the EJ257 heads I would go with those b/c of the AVCS. Also, I believe (someone correct me if I am wrong) there are some wiring issues to figure out w/EJ207 heads on an EJ257. Also, I would not go the hybrid route if you already have a STI/EJ257 longblock.

So, I agree w/Basco put the longblock in. I would also throw some forged pistons in there and even consider a mild cam upgrade (i.e. Kelford 264s or Tomei 252s) to help improve the top end, depending on what turbo you choose to run (smaller the turbo = smaller grind cam; larger the turbo = larger grind cam).
c2bcoolwrx is offline  
post #4 of 8 Old 10-20-2009, 10:47 PM
WRXtuners Member
 
basco's Avatar
 
Join Date: Aug 2004
Location: South Carolina
Posts: 1,873
basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to
Send a message via AIM to basco Send a message via MSN to basco
the 207 heads do have AVCS...and the wiring problem is the same if you have just a WRX and want either 207 or 257 swap

FP GT35R MoTeC M800 AndrewTech PPG'd Wagon - 513AWHP
06 Mazdaspeed6 280/330
- Matt
basco is offline  
post #5 of 8 Old 10-30-2009, 05:43 PM Thread Starter
WRXtuners Member
 
Join Date: Sep 2008
Location: Utah
Posts: 33
Drexer13 is an unknown
what's the fix for the avcs? Is it rpm induced?
Drexer13 is offline  
post #6 of 8 Old 10-30-2009, 06:35 PM
WRXtuners Member
 
basco's Avatar
 
Join Date: Aug 2004
Location: South Carolina
Posts: 1,873
basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to basco is a WRX expert worth listening to
Send a message via AIM to basco Send a message via MSN to basco
to wire it in and use an ECU or tuning system that supports it...but if you don't hook it up it will always be in high lift mode so your not sacrificing high end power...but my only question to you is why are you so dead set on using a different set of heads...your stock wrx ones will be fine...just research the "Hybrid" Build

FP GT35R MoTeC M800 AndrewTech PPG'd Wagon - 513AWHP
06 Mazdaspeed6 280/330
- Matt
basco is offline  
post #7 of 8 Old 10-31-2009, 03:20 AM
WRXtuners Member
 
Kjott21's Avatar
 
Join Date: May 2006
Location: Pennsylvania
Posts: 763
Kjott21 is known to be trustworthy and helpful Kjott21 is known to be trustworthy and helpful Kjott21 is known to be trustworthy and helpful
Garage
What version are the EJ207 heads? There were a couple of JDM STI heads that came with nice big port heads.

If you don't want to run the AVCS you can always plug the camshafts and run them. One of the local guys did that.

If you want to run the AVCS you would need to run an EJ207 ECU or get a standalone and wire them up. Neither is really easy.

My name is Ken and I am a HP Junkie.
Kjott21 is offline  
post #8 of 8 Old 11-02-2009, 07:08 PM
WRXtuners Member
 
VD5505's Avatar
 
Join Date: Oct 2006
Location: Iowa
Posts: 905
Images: 6
VD5505 is known to be trustworthy and helpful VD5505 is known to be trustworthy and helpful VD5505 is known to be trustworthy and helpful
Send a message via AIM to VD5505 Send a message via MSN to VD5505
I would fix whats wrong with the EJ25 and go with some EJ205 head and have then sent out and get P&P really nice and get some valve springs and a nice set of Cams for them, go with the thicker Cometic head Gaskets to lower the compression back down to around 8:5.1 or so, and if you have some money put some nice forged pistons in there like CP or something. I wouldnt hassle with AVCS. The Hybrid setup is a really nice set up i like it alot and you can make alot of power with it. but you will need something bigger than STI injectors.
VD5505 is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Trackbacks are On
Pingbacks are On
Refbacks are On