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Old 09-11-2005, 06:02 PM   #1
03MBP
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Default EJ207 Vs EJ257 on a Green?

I am looking to do a swap on my WRX...I think the green/sz49 is the turbo that suits me best so I am wondering...for my application which would be a better setup: Ej257 swap...better low end Vs Ej207 swap..extra 1k redline and better heads and a stronger bottom end. I only plan to run low 12's on pump and somewhere in the 11's on race gas...do I really need an Ej207 for those power goals or could I make that power reliabley on a Ej257?

Any pros and cons and tips would be appretiated...
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Old 09-11-2005, 06:16 PM   #2
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Torque is nice, it also blows transmissions but there is
"no replacement for displacement".
Are you going to build your wrx heads or use STI heads? (Run avcs?...what AEM?).
Problem is, one bad det and it could be all over with those pistons..no?
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Old 09-11-2005, 06:17 PM   #3
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ej207! built!
better to have the stronger engine
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Old 09-11-2005, 06:30 PM   #4
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you know my stance on the subject!!! 207 all the way.
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Old 09-11-2005, 07:51 PM   #5
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I will be running a STi 6 speed.

I could probably swing CP pistons but if I go the short block + pistons combo I would have to stick with WRX heads.

Ed, when are you going to be finish up the rex and let me check out the 207 first hand?
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Old 09-11-2005, 08:21 PM   #6
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If you do a shortblock, get some cams while your at it
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Old 09-11-2005, 08:31 PM   #7
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I hear that there is a used built 2.4 Crawford race engine for sale at gruppe-s.
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Old 09-11-2005, 09:44 PM   #8
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I'm just worried about lag honestly...I hear because of the cam profiling on the 207 that it will be more laggy then an ej205 (considering I doubt I'll have the money to hook up the AVCS right away). I've been in a green'ed USDM STi and I love how torquey it feels...but then again if I am going to do the swap I want to do it right the first time. I've been reading up on sz49 dyno plots and it seems they start kicking in around 3k and hit fully around 4k...which is what I'm seeing on my untned vf22 right now so I'm sure I won't notice too much of a difference.

Selling points for the USDM short block: cheap initial cost/extra displacement/torque

Selling points for the JDM engine swap: can sell the ic/turbo and gain money back/stronger bottom end/more top end due to head flow/cams and higher red line.

I haven't seen anyone blowing up usdm STi's in the 12/11 second range though so maybe an ej207 is over kill for me...anyone else care to chime in? Seems like a somewhat popular turbo around here.
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Old 09-11-2005, 10:02 PM   #9
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257, rev to 7500, enjoy!
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Old 09-11-2005, 10:48 PM   #10
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Quote:
Originally Posted by imaKi
ej207! built!
better to have the stronger engine
+1



-----------------------------------------------------------------------------
ITS ONLY MY00 500hp@1.75 bar
http://spaces.msn.com/members/bosaleh/
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Old 09-11-2005, 10:58 PM   #11
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Quote:
Originally Posted by Timdog1650
257, rev to 7500, enjoy!
revving that motor to 7500 with a green setup will get you nowhere... throw on a gt40r then you might see some power up there! 257 + green = shortshifting.
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Old 09-12-2005, 12:17 AM   #12
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If you are going to run the STi 6 speed, I would 100% go EJ207, I have it and love it.
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Old 09-12-2005, 12:31 AM   #13
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Quote:
Originally Posted by midnite_wrex
revving that motor to 7500 with a green setup will get you nowhere... throw on a gt40r then you might see some power up there! 257 + green = shortshifting.
Haha, true, when I was doing that it was on spec C heads, so I was ina different boat than he will be....lol.

Okay, so I amend what I said, get some spec C heads and then do that!
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Old 09-12-2005, 08:16 AM   #14
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SZ49 + EJ207 = 12.1 @ 118 on pump gas (CRAPPY LAUNCH) and 11.3 @ 125 on race gas ("OK" launch).

I'd much rather spin my motor higher then deal with the constant abuse more torque generates EVERYWHERE.

Besides, and SZ49/Green combo on an EJ207 isn't too horribly laggy. And even so, when you can rev to 8k+, who cares if full boost comes in at ~3.8-4.3k? You still got FOUR THOUSAND+ RPMS of good times ahead

def
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Old 09-12-2005, 10:05 AM   #15
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Honestly, who cares if you can spin the motor out to 20k. Get the 257..makes daily driving in the lower rpms more enjoyable/easier and can still handle 400 whp on a good tune
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Old 09-12-2005, 01:30 PM   #16
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Quote:
Originally Posted by scoogan
Honestly, who cares if you can spin the motor out to 20k.
thats a SUPER informed comment right there.
give me a motor that revs to 20k and makes 50lb ft of torque at 20k rpm... ill eat your 400whp sti for breakfast.
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Old 09-12-2005, 01:46 PM   #17
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Quote:
Originally Posted by scoogan
Honestly, who cares if you can spin the motor out to 20k. Get the 257..makes daily driving in the lower rpms more enjoyable/easier and can still handle 400 whp on a good tune
until it pops.

def
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Old 09-12-2005, 04:26 PM   #18
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Thanks for your comments d-e-f, I was looking for your input. 12.1 on pump is definitely my plans...3800 isnt too terribly laggy either.

Hmm...still waiting for the USDM STi / green/49 tribe to speak.
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Old 09-12-2005, 05:01 PM   #19
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I have a EJ207 and the lag part actually isn't all that bad. It does pull fine around town and when you do get out to were you can open it up it is awesome

Plus the 8500rpm redline I have is great. I have abused my engine to no extent and it is still within 8% on the cylinders so I is fairly indestructible

P.S. I have a 7cm Green
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Old 09-12-2005, 07:44 PM   #20
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You going to e-town anytime soon? Would love to see the car in person.
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Old 09-12-2005, 07:48 PM   #21
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etown! go friday im going to be attempting to hit 14's in my RS lol
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Old 09-12-2005, 07:50 PM   #22
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Quote:
Originally Posted by 03MBP
You going to e-town anytime soon? Would love to see the car in person.
Who's car would it be that you would like to see I actually may be going this Weds if my friend takes his Lehmans down cause we are gonna line up

If you want to ask someone on the EJ257/Green deal PM Junior2JZ about it. He did one that ran at the first WRX/EVO event. Pump gas bad slipping clutch it did a lousy QM but trapped@116
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Old 09-13-2005, 06:09 PM   #23
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Quote:
Originally Posted by 2002WRXSTi
Who's car would it be that you would like to see I actually may be going this Weds if my friend takes his Lehmans down cause we are gonna line up
Yours lol, I'm trying to do comparos between the ej207 vs ej257 on a green/sz49. I know one person on here thats local with the ej257 / green setup waiting to see him pull a good time at the track. Don't really know anyone local with an ej207 and even harder to find one using a green/49.
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Old 09-14-2005, 04:21 PM   #24
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EJ257 and enjoy the new found torque
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Old 09-14-2005, 04:39 PM   #25
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in light of louis, michael, and doug... i would go 207 all day now. i just wish i had saved the bank for it. no one is proving their 257's on the track really.. except maybe phil (element) and his 1 customer at the other subie shootout.
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