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Old 01-11-2016, 04:44 PM   #1
falcon1982horus
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Default Hybrid build / Parts selection help needed

Hi WRX fellow,

To everyone who has hybrid build EJ257 on EJ205 port head. Please give me good constructive advice on who is a good approach and what parts recommended append to what I have list here. What level of power do you guys thing i will get on stock stage 1 drivetrain to the wheel?

I have a beautiful red Saab 9-2X (WRX with STI rack)
My motor blown on me just right before Christmas @ 150K

Anyway, I decided to keep the car going as a DD and go on with Hybrid engine build on 19-24 psi.
- Build block EJ257
- Weisco 100mm piston
- Manly rod
- ACL racing bearing
- STI Nitride crankshaft
- TOMEI M7960 rather than M7690
- Injectors Dynamic 1000CC
- Welbro 255 fuel pump
- Cobb EBC
- Cobb access port V3
- Up pipe & bell mount down pipe
- High volume TMIC
- K&N filter

Much appreciate.

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Last edited by falcon1982horus; 03-19-2016 at 06:41 AM.
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Old 01-13-2016, 06:24 PM   #2
redwards11
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If I had to guess 320-400whp depending on dyno, altitude and fuel. You can aim to the higher end with cams and head work. I just did my first start on my new motor running the same m7960. Old result for me on stock 205 heads/257 bottom end was 352whp 367wtq on dynojet on 19psi, conservative timing and fueling. I went with cams, port on heads and chamber match this time around.
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Old 01-18-2016, 12:54 PM   #3
bdubblu
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That turbo is good for up to 400hp. Your list of mods is going to get you close... a pump gas tune would probably get you more in the 360-380 at 22-23psi. That said, the power will come on EARLY if you look at the charts. So for "driveability" and overall DD-ness, I'd give this setup a thumbs up. I think you'll be pretty happy. If you're looking for most peak power, and don't mind waiting until 4K rpm or later, choose a different turbo. Too much bigger and you may max out the 1000cc's. Your tuner would be the best guy to ask about all of this.

It's always the wisest to consult a tuner anytime you put together a list of mods like this.
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Old 01-22-2016, 06:05 PM   #4
falcon1982horus
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I hope to see something close to 370whp with 19 PSI. I have EJ257 and port match polish 205 head. Like to have a all around fun and VERY reliable DD, Thx guys.
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Old 01-27-2016, 12:19 AM   #5
URABUS07WRX
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I would stick away form 100mm pistons if possible. Keep as much cylinder wall as possible. I know a good number of shops that won't do a piston that size. 99.75 is as big as they will go and it much be for good reason.

For pistons I'd stick with Manley, CP and JE. H-Tuff rods seem like the no brainer for most builds. Manley rates those rods at 750 chp.

Bearings of choice depending who builds it and what they're comfortable with using.

For turbos I'd personally recommend blouch or any borg turbo. A few are stock location too which is awesome.

I'd get the heads port matched to the 2.5L and then you can really get some more out of the heads if you decide to do cams.

With a 5 speed id look at the 6258 from Borg. Vf series spool without the asthma attack. The blouch 16gxt would be my second choice.

Just my 2c. Hope it helps!
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Old 01-27-2016, 07:01 AM   #6
Gigs90
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Just drop in an EJ207 then run it on carberry flexfuel for a solid 350whp on e85 that will be long term reliable
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Old 01-29-2016, 02:37 PM   #7
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You can save yourself some money by purchasing JE hybrid pistons. That way you won't need to get the heads chamber matched. It's the way I'm going after talking to a few shops and a few members on here who have done it.
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Old 01-29-2016, 06:25 PM   #8
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Quote:
Originally Posted by svynx View Post
You can save yourself some money by purchasing JE hybrid pistons. That way you won't need to get the heads chamber matched. It's the way I'm going after talking to a few shops and a few members on here who have done it.

I just put the JE's in my build. No problem. Chamber matching is highly debated, but there's a ton of hybrids using the JE's with perfect results.
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Old 01-30-2016, 07:52 PM   #9
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I just put the JE's in my build. No problem. Chamber matching is highly debated, but there's a ton of hybrids using the JE's with perfect results.
Agreed. The "proper" thing to do would be to chamber match (when using any stock or non-hybrid piston). Going with the JE hybrid piston kills two birds with one stone...getting a forged piston, and not having to deal with the chambers matching. The charge to have the machining plus the price for the pistons compared to just pistons is a no brainer to me.
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Old 02-04-2016, 08:07 PM   #10
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Quote:
Originally Posted by svynx View Post
You can save yourself some money by purchasing JE hybrid pistons. That way you won't need to get the heads chamber matched. It's the way I'm going after talking to a few shops and a few members on here who have done it.
Two years with JE pistons on a hybrid build here, no problems, although I'm still on the stock TD04. Ya, it's only got 230 whp, but the 280 wtq comes on at 2800 rpm!
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Old 02-04-2016, 11:01 PM   #11
bdubblu
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Quote:
Originally Posted by Hagbeard View Post
Two years with JE pistons on a hybrid build here, no problems, although I'm still on the stock TD04. Ya, it's only got 230 whp, but the 280 wtq comes on at 2800 rpm!

Ha! That powerband's gotta feel like a v8.
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Old 02-05-2016, 10:48 AM   #12
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It has tons of mid grunt, but it starts falling off pretty quickly north of 5K. Great for passing and finding holes in traffic, though.
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Old 02-08-2016, 09:08 PM   #13
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Quote:
Originally Posted by Hagbeard View Post
Two years with JE pistons on a hybrid build here, no problems, although I'm still on the stock TD04. Ya, it's only got 230 whp, but the 280 wtq comes on at 2800 rpm!
You are my hero! I miss my stock turbo days sometimes.
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Old 02-08-2016, 11:28 PM   #14
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Quote:
Originally Posted by Gigs90 View Post
Just drop in an EJ207 then run it on carberry flexfuel for a solid 350whp on e85 that will be long term reliable
+1, love my EJ207 conversion super reliable, daily driver, 1/4 miles, occassional track day.

But I think its the wrong section for this thread.
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Old 02-19-2016, 08:30 PM   #15
falcon1982horus
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Thank for all you 2 cents and comment fellow. I already bought build my new block with listed part. So, I had to get my head port matched. I choose this Tomei snail because of the exact fitment and Japanese quality in detail. It is really remarkable. When I get it back from the shop, I will take sometimes to learn my new power band and its characteristic. Another month or two in, I should be in full tune and tight bra undone mode. +
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Old 06-28-2016, 07:28 PM   #16
falcon1982horus
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It had been a while since I got it through break-in period not break-it period. I finally got my car full tuned and Mustang dyno with EJ257 full forge block and STI head.
Result is impressive and satisfying. @ 20 PSI produces 320 WHP on 92 Octane Dinosaur fuel.
Stock intake and exhaust for sleeper kill, quiet and super fast..
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