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Old 02-04-2017, 11:30 PM   #101
grangepack2
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Quote:
Originally Posted by boostinsticnd View Post
Just bought a motor build by rocket rally.

ej25 block with carrillo rods and JE RR pistons, Ej207 spec C heads, 14mm head studs and more.

How is it ruuning?

Turbo?
Peak Tq timing?
Avcs?
REDLINE?
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Old 02-04-2017, 11:33 PM   #102
grangepack2
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Quote:
Originally Posted by Ride4 View Post
I built a hybrid motor using na ej25 pistons. I've put 10k miles on it with zero issue
Do one trackday and see if you'll have the same response
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Old 02-04-2017, 11:34 PM   #103
grangepack2
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Quote:
Originally Posted by wilsonsmachine View Post
I just built a 257 block using Je Hybrid pistons, 205 heads PnP, 1mm OS valves, STi cams , shimless buckets, vf48, and DW750's for my 02 bugeye. Never owned a Subaru before but have built many ej motors in my career. Curious to see how it works out. Should find out this week for you Hybrid guys!
? How'd it go?
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Old 08-15-2017, 02:16 AM   #104
Ride4
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Quote:
Originally Posted by grangepack2 View Post
Do one trackday and see if you'll have the same response
Are you being serious here? I've ran at the track multiple times hitting low 12s at 118-120 trap speed with no issue by the way I'm still running my stock 05 wrx 5 speed transmission lol. I bet you're one of those guys who have never experienced first hand and just heard from a friend that this setup won't work and that setup will work lol
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Old 08-22-2017, 02:15 PM   #105
Chad04STI
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Default 2004 STI EJ207 swap help

I am looking to swap a v7-v9 ej207 into my 04 sti, but now have heard a lot of reasons from multiple shops stating that this will be far to much money for my $8,000-$9,000 budget because of the engines throttle by wire, and the cam sensors. I'm on here to hopefully find some clarification on what all is entailed for this engine swap before I throw out this option and stick with a built ej257.
Thank you,
Chad
Also looking to see if the ej207 will pass emissions in Kentucky (I heard we don't have many requirements but one shop asked about emissions before they'd quote the swap?!)
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Old 08-23-2017, 11:49 AM   #106
svynx
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Quote:
Originally Posted by Chad04STI View Post
I am looking to swap a v7-v9 ej207 into my 04 sti, but now have heard a lot of reasons from multiple shops stating that this will be far to much money for my $8,000-$9,000 budget because of the engines throttle by wire, and the cam sensors. I'm on here to hopefully find some clarification on what all is entailed for this engine swap before I throw out this option and stick with a built ej257.
Thank you,
Chad
Also looking to see if the ej207 will pass emissions in Kentucky (I heard we don't have many requirements but one shop asked about emissions before they'd quote the swap?!)
Question before anything else is said. Is there are reason you are wanting to put a 2.0l in place of the 2.5? This thread is for those of us who have the 2.5 block and 2.0 heads.
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Old 08-23-2017, 05:50 PM   #107
Paul
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Quote:
Originally Posted by Ride4 View Post
Are you being serious here? I've ran at the track multiple times hitting low 12s at 118-120 trap speed with no issue by the way I'm still running my stock 05 wrx 5 speed transmission lol. I bet you're one of those guys who have never experienced first hand and just heard from a friend that this setup won't work and that setup will work lol
I bet he ment road course not 1/4. Road racing does alot more wear and tear on the car than a few passes down the strip.
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Old 08-30-2017, 02:48 PM   #108
Ride4
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Quote:
Originally Posted by Paul View Post
I bet he ment road course not 1/4. Road racing does alot more wear and tear on the car than a few passes down the strip.
I haven't taken it out to a road course before but I believe that it will withstand the abuse on a road course because I abuse it daily.
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Old 06-07-2018, 09:40 AM   #109
Javiisst
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looks like i have come to the right place...
living in Sweden isnt so good for a Subaru owner because the lack of experience and info. (according to me and a few).

So to the questions:

I have a Subaru STI 2005 UK with EJ207 in it and running with 370AWHP.
I think my HG is leaking and its not news for this type of engine.

Im thinking about a Hybrid with forged EJ257 from an STI 2006 and my EJ207 STI heads.

setup i already have:

-GTX3076r
-Equal exhaust manifold
-3" decat all the way
-Aftermaket uppipe
-3" turbo inletpipe
-Grimmspeed EBCS
-ID1000cc
-Aeromotive FPR
-Walbro 400 intank
-FMIC
-Aftermarket fuelrails
-Link G4+


So now im looking for a pretty stright forward on "how-to" and "what-to-do" and so on.
Thanks for any help and advice

Greetings From Sweden
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Old 06-10-2018, 08:04 AM   #110
Javiisst
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Is this thread dead ?
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Old 06-10-2018, 08:10 PM   #111
ripman
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I have a '99 wrx Aus delivered. They are ej205 non avcs.

I used the JE pistons for ej25 with ej20 head which are 26cc dish and also removed 2cc's from the chambers whilst matching them to the bores. This gives about 8.2:1 static compression. I you are any good with a die grinder the chambers can be done very nicely by hand, it is just a matter of scribing a 2.5 head gasket on the head and working to the shape, leave half a mm for sanding by hand. Have a couple of old valves back cut and sunk into the seats to save any nicks to the seats. Some people use a thicker (1.1mm) head gasket which is not ideal for quench. I am using a .67mm gasket from memory

There seems to be a bag of mixed results building hybrids and tuning them. They can play up a bit taking timing once the compression starts to get up a bit. Remembering that these engines are already knock limited on pump fuel that is not an ideal situation.

I personally took the view to keep the compression down and to remove the overhang from the combustion chamber to avoid any possible hot spots in order to take a good 26psi and whatever timing it needs for it to work well. I took that view after being involved with the tuning of some hybrids that had 2.0l heads slapped on 2.5l blocks which were torquey down low but seemed to leave a bit on the table as far as timing went on a normal 2.5 build. Boost will always beat compression as far as horsepower percentage per point goes.

My engine is working well, has 24psi in it and plenty of timing and is making 200kw /270hp by 4000rpm with a dom3 on it.

This is my experience with this type of engine. I am not claiming to be an expert on the subject but it is what I have seen. Others may have had different experiences and I respect that.

The 2.5 litre will bring that 3076 you are using on a good 500rpm earlier.
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Old 06-11-2018, 02:15 AM   #112
Javiisst
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oh ok,

well if im doing anything then its going to be with machine as far for the heads and for the block itself its already done by a friend and waiting for installation, the parts are forged but not like specific for hybrid build, i dont think it matters if one fixes the chamber.

I will go for this build if i dont find a forged londblock och shortblock 2,0l ej207, and if it is a reliable build/Hybrid...
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Old 06-24-2018, 01:09 PM   #113
Darksol503
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Default Hello fellow hybrid build owners!

By chance I bought a project car that I didnít have much info on; a WRB bugeye WRX here in Oregon that was fairly rough around the edges but I thought would make a great canvas to work on with my teen son and teach him about maintenance.

Upon posting the car in numerous local Subie FB groups (we were pretty excited!), a previous owner (it has changed hands numerous times) got a hold of me and wanted to inform me of what I had actually acquired. Some parts I could easily identify (AEM stuff, EBCS, etc.) but others were solidified by his helpful outreach. This far I know I have:

AEM Short Ram Intake
Top Mounted Intercooler
TurboXS BOV
Turbo oil-catch can
TD05 turbo
Hi-flow Radiator
Grimm Speed three-way boost controller
2006+ STI Dark Blue Injectors 565cc ($100)
Blitz deluxe dual Turbo timer
Full cat back exhaust (not sure what brand)
2.5 STI block
2.0 heads
5spd Transmission from turbo Baja
High compression
Stock 2002 ecu

Whoa... so here I am with a fairly built Subie, waiting for the tune shop (PSI here in the Portland area) to give me the heads up on a good map for the parts (stock ECU is running rich! she has a CEL know after a day of plugging in the ECU, and I hope the mapping takes car of it. 160k on the odometer, and she actually drives really smooth. I have yet to push her any where near spinning up the turbo btw.

Any helpful hints, suggestions, or recommendation from yíall on this thread? I really want to turn her more towards the conservative side (PSI said they will help in that dept.) as she will be a daily driver clocking only 20-40 miles a day of that.

Thanks again! Will post pics of I can figure it out through mobile!

https://imgur.com/gallery/zMCpaaW

Chris
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Old 06-25-2018, 12:36 AM   #114
Darksol503
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Default Plugs and other items???

Also what about regular maintenance items? Iíve moved her up to T6, going to be using Subie coolant only, what about spark plug suggestions when needing to swap out? What would be recommended on a 2.0/2.5 Hybrid?

Quote:
Originally Posted by Darksol503 View Post
By chance I bought a project car that I didnít have much info on; a WRB bugeye WRX here in Oregon that was fairly rough around the edges but I thought would make a great canvas to work on with my teen son and teach him about maintenance.

Upon posting the car in numerous local Subie FB groups (we were pretty excited!), a previous owner (it has changed hands numerous times) got a hold of me and wanted to inform me of what I had actually acquired. Some parts I could easily identify (AEM stuff, EBCS, etc.) but others were solidified by his helpful outreach. This far I know I have:

AEM Short Ram Intake
Top Mounted Intercooler
TurboXS BOV
Turbo oil-catch can
TD05 turbo
Hi-flow Radiator
Grimm Speed three-way boost controller
2006+ STI Dark Blue Injectors 565cc ($100)
Blitz deluxe dual Turbo timer
Full cat back exhaust (not sure what brand)
2.5 STI block
2.0 heads
5spd Transmission from turbo Baja
High compression
Stock 2002 ecu

Whoa... so here I am with a fairly built Subie, waiting for the tune shop (PSI here in the Portland area) to give me the heads up on a good map for the parts (stock ECU is running rich! she has a CEL know after a day of plugging in the ECU, and I hope the mapping takes car of it. 160k on the odometer, and she actually drives really smooth. I have yet to push her any where near spinning up the turbo btw.

Any helpful hints, suggestions, or recommendation from yíall on this thread? I really want to turn her more towards the conservative side (PSI said they will help in that dept.) as she will be a daily driver clocking only 20-40 miles a day of that.

Thanks again! Will post pics of I can figure it out through mobile!

https://imgur.com/gallery/zMCpaaW

Chris
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Old 09-01-2018, 07:53 PM   #115
RYDER98
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Location: Gillieston Heights, Australia
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Default Head gasket options

Hey guys, just canvassing options here and info.

For the ej257 short block with 2.0 heads what head gasket do you use. Iím planning on using the JE 99.75 hybrid piston; http://www.jepistons.com/Products/296349.aspx

Anyone used these pistons for there builds before
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Old 09-03-2018, 03:35 AM   #116
onurba32
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Quote:
Originally Posted by RYDER98 View Post
Hey guys, just canvassing options here and info.

For the ej257 short block with 2.0 heads what head gasket do you use. Iím planning on using the JE 99.75 hybrid piston; http://www.jepistons.com/Products/296349.aspx

Anyone used these pistons for there builds before
I am using this piston with ej20k heads with athena head gasket.
I dont have any problem yet.
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Old 09-03-2018, 03:58 PM   #117
Supernouht
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Quote:
Originally Posted by Javiisst View Post
looks like i have come to the right place...
living in Sweden isnt so good for a Subaru owner because the lack of experience and info. (according to me and a few).

So to the questions:

I have a Subaru STI 2005 UK with EJ207 in it and running with 370AWHP.
I think my HG is leaking and its not news for this type of engine.

Im thinking about a Hybrid with forged EJ257 from an STI 2006 and my EJ207 STI heads.

setup i already have:

-GTX3076r
-Equal exhaust manifold
-3" decat all the way
-Aftermaket uppipe
-3" turbo inletpipe
-Grimmspeed EBCS
-ID1000cc
-Aeromotive FPR
-Walbro 400 intank
-FMIC
-Aftermarket fuelrails
-Link G4+


So now im looking for a pretty stright forward on "how-to" and "what-to-do" and so on.
Thanks for any help and advice

Greetings From Sweden
A 2.5 would be a great upgrade for you and make that big turbo spool a lot better!
If your head gasket was leaking then make sure you check the flatness of your heads and have them planed if necessary. And really stress to the shop to only remove the minimum required. A lot of shops grind the hell out of them which throws your compression ratio way off.
After that you want to open up the sides of your combustion chambers to match the larger bore of the ej25, and CC them to make sure they are all even.

Other than that it is very straight forward, just swap everything over with your new ej25 shortblock and go have it tuned.
You're also gonna want to do some math on your final head CC along with piston dish, deck height and gasket thickness to see where your compression ratio is at.
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Old 09-03-2018, 04:01 PM   #118
Supernouht
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Quote:
Originally Posted by onurba32 View Post
I am using this piston with ej20k heads with athena head gasket.
I dont have any problem yet.
I ended up using a felpro mls ej25 subaru Legacy gasket as it was thicker than the STI gasket and gave me the compression ratio I was looking for
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Old 09-03-2018, 04:19 PM   #119
Supernouht
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Quote:
Originally Posted by Darksol503 View Post
By chance I bought a project car that I didnít have much info on; a WRB bugeye WRX here in Oregon that was fairly rough around the edges but I thought would make a great canvas to work on with my teen son and teach him about maintenance.

Upon posting the car in numerous local Subie FB groups (we were pretty excited!), a previous owner (it has changed hands numerous times) got a hold of me and wanted to inform me of what I had actually acquired. Some parts I could easily identify (AEM stuff, EBCS, etc.) but others were solidified by his helpful outreach. This far I know I have:

AEM Short Ram Intake
Top Mounted Intercooler
TurboXS BOV
Turbo oil-catch can
TD05 turbo
Hi-flow Radiator
Grimm Speed three-way boost controller
2006+ STI Dark Blue Injectors 565cc ($100)
Blitz deluxe dual Turbo timer
Full cat back exhaust (not sure what brand)
2.5 STI block
2.0 heads
5spd Transmission from turbo Baja
High compression
Stock 2002 ecu

Whoa... so here I am with a fairly built Subie, waiting for the tune shop (PSI here in the Portland area) to give me the heads up on a good map for the parts (stock ECU is running rich! she has a CEL know after a day of plugging in the ECU, and I hope the mapping takes car of it. 160k on the odometer, and she actually drives really smooth. I have yet to push her any where near spinning up the turbo btw.

Any helpful hints, suggestions, or recommendation from yíall on this thread? I really want to turn her more towards the conservative side (PSI said they will help in that dept.) as she will be a daily driver clocking only 20-40 miles a day of that.

Thanks again! Will post pics of I can figure it out through mobile!

https://imgur.com/gallery/zMCpaaW

Chris
If there is a CEL on then you have to scan it with a code reader, it will likely tell you what the problem is and may be the cause of your rich condition. You want to fix this BEFORE having it tuned. It will save you wasted time and money in the tuner shop.

Could be 1 of a number of sensors that have gone bad that would cause it to go rich, or it could be a vacuum/boost leak, or a leaky injector probably other stuff I'm not thinking of too. Oh I just realized you said you are running larger injectors on a stock ecu... if the map is indeed stock then you would be running VERY rich!

Also I suggest replacing that stock turbo with a vf39, you'll be amazed at the difference on the 2.5 motor.
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Old 01-29-2019, 01:47 PM   #120
Krucifire
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Default Help?

I cannot seem to figure out where exactly I am suppose to create a thread in regards to asking a few questions about a hybrid build? Can someone point me in the right direction please? Thanks in advance!
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Old 02-02-2019, 05:08 PM   #121
Snow_Shovel
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Not sure if i asked this here before or not, but question about CRís on my built. Using IAG Stage 2.5 CDB with Ver 8 EJ207 big port heads bowl matched by outfront. Using an OEM thickness Crawford HG with 99.75mm pistons, what might i see for compression ratio? IAG only gives CR estimates using 257 heads.

Anyone run a similar build? Or point me in the direction on how to calculate CR myself?
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Old 02-11-2019, 11:34 PM   #122
Mkehnsn94
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Bowl matched.. or combustion chamber matched?

If you have outfront change your combustion chambers from 2.0 to 2.5.. you will have whatever the piston specs the 2.5 as.

If you run a 2.0 head with 2.5 pistons, no matching.. add like half a point or something. I cant remember.
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Old 02-12-2019, 08:41 AM   #123
Homemade WRX
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search FIRST, then PM!!!

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Quote:
Originally Posted by Snow_Shovel View Post
Not sure if i asked this here before or not, but question about CRís on my built. Using IAG Stage 2.5 CDB with Ver 8 EJ207 big port heads bowl matched by outfront. Using an OEM thickness Crawford HG with 99.75mm pistons, what might i see for compression ratio? IAG only gives CR estimates using 257 heads.

Anyone run a similar build? Or point me in the direction on how to calculate CR myself?
You need your chamber volumes and then you can you whip up a quick spreadsheet or use one of dozens of online calculators.
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