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Fully built EJ25

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Hello, I would like some opinions and thoughts on my build. Here's a list of the mods(I hope I remember them all:P)

Heads:

BC intake & exhaust +1mm valves

BC intake & exhaust valve guides

BC single spring & titanium retainer kit

BC 280° camshafts

BC exhaust cam gears ( intake are avcs)

Ported and polished heads

Engine:

Darton Iron Dry sleeves

Je time attack fsr pistons

Cobb tuning light weight connecting rods

King engine main and rid bearings

Supporting mods:

Cosworth high volume and high flow oil pump

DW 1000CC INJECTORS + FUEL RAILS

WALBRO FUEL PUMP

AEM FUEL REGULATOR

OIL CATCH CAN

FRONT MOUNT INTERCOOLER KIT

ACT PROLITE FLYWHEEL

ACT XTREME 6-PUCK KIT(PRESSURE PLATE & DISK)

ALUMINUM RACING RADIATOR

FORCED INDUCTION

GTX 3071R GEN 2 BOLT ON

ECU LINK G4+

Hi mate, looks to be an interesting build. will it be used for street/track use?

I had issues with big end failure on my ej257 and would strongly suggest some form of baffle plate for the sump or a baffled sump to reduce the chance of big end failure on hard cornering.... oil starvation was a killer on mine.

stretch

The big issue with Subaru rod bearings is oil temp. You need to watch it like hell, I don't allow it to go over 105 C, I aim over the next year to get it to run closer to 85 C. I don't have any experience with turbo just NA at 8,000 rpm and rod bearings.

Attached is a photo of the Sump of a NA Subaru engine, the brown you see on the inside of the sump is burn oil that has cooked from the exhaust going so close to the sump. The steel on that side of the sump got hot enough to burn the oil that touched it. So as I say oil temps and rod bearings are directly related.

Last point don't use over size bearings on Subaru's its bad news stick with standard.

Attached Files

Hey Ray,

I've got a bit of experience with Subarus, so can help you a little.

As I do with all my customers however, before you can talk about a build, you need to let us know about the purpose of your car, the desired power band, how high you want to rev it, how much power you want to make, what fuel you'll be running and anything else you can think you should mention about your goals.

Once you've done that, I can give you a better informed review of your mod list.

Kind regards,

Julius

hello, i am with Julius on this .. I have built a few engines for a few friends and some customers mainly sub's ..

what do u want to do with the car. will it be a daily driver etc etc

once you can answer this then all will be clear.

an example is my own car.

I have a forged bottom end stock b25 head with stock cams ..

id1000 injectors

parallel fuel system with upgraded pump

meth injection

with an HX35 turbo

i am at about 425HP wheel

and this is my daily driver in the summer

hope it helps

Xavier