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Discussion Starter · #1 ·
Planning on having a build short block put in.

Shop doing it quoted me $4400~ for:
- New OEM Ej257 Block halves
- New OEM Ej257 crankshaft
- New OEM 11mm STi Oil pump
- New OEM Complete Engine Gasket Set
- JE FSR Ej257 Pistons
- Manley "H-Tuff" Connecting Rods
- ACL Race Main Bearings
- ACL Race Rod Bearings
- ARP Head suds
- NEW OEM Oil pick-up tube
- NEW Gates Water Pump and Timing Kit

My current mods are:

Blouch Performance 20g-xtr turbo
Grimmspeed tmic
MXP headers and uppipe
Invidia catless downpipie
Cobb sf ram intake
Cobb 1000cc injectors
Cobb ebcs
Cobb access port v2
DW fuel pump
GFB fuel pressure regulator kit
IAG aos
SPT strut tower brace
SPT Lower chasis brace
SPT short throw shifter
SPT Group-N trans and motor mounts
SPT Group-N pitch stopper
Prova D-Ring steering wheel
Greddy spectrum elite exhaust

With all that being said this is my daily, shooting for the 400-500hp range. Am wasting my money not getting a closed deck short block?
 

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400-500hp, or 400-500whp? People typically state power goals in terms of wheel horse power since plain horse power cannot be measured. What type of fuel do you plan on running, and what dyno are you looking to make these numbers on?
 

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Discussion Starter · #3 ·
400-500 whp is the goal and I'm planning on just staying 93 since its my daily. E85 would be cool but I'm not interested in changing my oil every 1000mi, and I/m not sure about meth injection.
 

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400-500 whp is the goal and I'm planning on just staying 93 since its my daily. E85 would be cool but I'm not interested in changing my oil every 1000mi, and I/m not sure about meth injection.

Okay.. if it was just the 20g-xtr I would say an OEM block from Subaru would be a lot more reliable, but to hit 400-500whp on 93 octane you're going to need a MUCH larger turbo than the one you currently have (larger injectors as well depending on if you want to be closer to the 500whp side of things, probably fuel pump too). For that size turbo I highly recommend going ahead and getting a rotated turbo, headers, uppipe, downpipe, and intake.

Of course it all depends on the dyno.. you could easily adjust a dyno to say 500whp with the mods you currently have. Either way, I wouldn't recommend daily driving a Subaru with a built engine.. that is, unless you do little driving in a year, or don't mind building a new engine every couple of years.


On a side note, depending on the shop in question, I would go ahead and order a pre assembled block from a proven, highly reputable builder. There are very few shops that I would trust to build a Subaru engine.
 

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Discussion Starter · #6 ·
This is verbatim from the shop that did the compression/leakdown

CYL #1 140psi

CYL #2 135psi
CYL #3 135psi
CYL #4 83 psi Leak Down 78% Leakage crank case

Diagnosed CYL 4 failure recommend engine rebuild
 

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This is verbatim from the shop that did the compression/leakdown

CYL #1 140psi

CYL #2 135psi
CYL #3 135psi
CYL #4 83 psi Leak Down 78% Leakage crank case

Diagnosed CYL 4 failure recommend engine rebuild
OK, so supposed that your block can be honed and the heads are fine, I would recommend a basic 4032 piston build with uprated bearings and OEM rods. Crank should be fine as-is. Since the heads are off the car and you will need a new ECU calibration, I wouldn't say no to a port cleanup and some hotter cams. If that header isn't an equal-length header, it should be for your goals.
 

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Planning on having a build short block put in.

Shop doing it quoted me $4400~ for:
- New OEM Ej257 Block halves
- New OEM Ej257 crankshaft
- New OEM 11mm STi Oil pump
- New OEM Complete Engine Gasket Set
- JE FSR Ej257 Pistons
- Manley "H-Tuff" Connecting Rods
- ACL Race Main Bearings
- ACL Race Rod Bearings
- ARP Head suds
- NEW OEM Oil pick-up tube
- NEW Gates Water Pump and Timing Kit

My current mods are:

Blouch Performance 20g-xtr turbo
Grimmspeed tmic
MXP headers and uppipe
Invidia catless downpipie
Cobb sf ram intake
Cobb 1000cc injectors
Cobb ebcs
Cobb access port v2
DW fuel pump
GFB fuel pressure regulator kit
IAG aos
SPT strut tower brace
SPT Lower chasis brace
SPT short throw shifter
SPT Group-N trans and motor mounts
SPT Group-N pitch stopper
Prova D-Ring steering wheel
Greddy spectrum elite exhaust

With all that being said this is my daily, shooting for the 400-500hp range. Am wasting my money not getting a closed deck short block?
Killerb oil pickup is much better quality than the welded OEM pickup and OEM waterpump I believe is better than Gates FWIW

Sent from my iPhone using Tapatalk
 
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