Replacement engine for my 08 WRX Hatch

[Mindriddle]

Originally Posted by GeoNV

However if you buy forged pistons they usually are the same dish volume as the STi and so will increase compression. Maybe they say that cause you'd need to tune differently to avoid detonation.

Thanks. Yea I will ask my tuner about whatever combination I end up putting together.

I also have been looking at JDM alternative and all the different variations and tons on information makes it hard to pinpoint exactly what I need or which/what needs to happen. The picture below is a screenshot of what I found on ebay on a single AVCS jdm engine - The description on most postings there are misleading because sometimes it doesnt say if its dual or single or non AVCS, and im not familiar enough to identify the differences between the early years vs what jdm came from my 08+ model years. If I find a long block with single AVCS like mine, can I just transfer sensors, etc. from my original engine to make it a direct swap and just retune for a 2.0?



And why do some engines have the tensioner on the AC belt where some (like my oem) is the 'stretch' install type?

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[GeoNV]

If I were to do it again I’d seriously consider the jdm ej20y or 20x. This is the 10th motor I’ve built and by far the most nit picky little details that matter. From what I’ve read if you get the single AVCS motor and swap your intake manifold and wiring harness onto it it should work. Never got a definitive answer on that as some say it’s fine and other say it’s not.

[Mindriddle]

Originally Posted by GeoNV

If I were to do it again I’d seriously consider the jdm ej20y or 20x. This is the 10th motor I’ve built and by far the most nit picky little details that matter. From what I’ve read if you get the single AVCS motor and swap your intake manifold and wiring harness onto it it should work. Never got a definitive answer on that as some say it’s fine and other say it’s not.

I hear ya. Im thinking of all my options, including maybe to just sell the car as is. I have other cars in mind that I'd rather tinker with and I have an Audi S4 B8 that roughly puts down about 460whp, so I have a go-fast fix if I ever need it. Lol. Its just fun having the subi around as Ive had the car for some time and have worked on basically everything on it so its hard to let it go.

[Mindriddle]

Ok another question.
If i was to purchase a new RA block, are there any recommendation for re-sealing the halves or it a set your parts and go ready? Also I know that using the D25 WRX heads will slightly increase compression (8.78:1 from 8.55:1), which my tuner doesnt mind, but do you guys have any concerns with the small increase in compression?

[RedMerc]

Originally Posted by Mindriddle

Ok another question.
If i was to purchase a new RA block, are there any recommendation for re-sealing the halves or it a set your parts and go ready? Also I know that using the D25 WRX heads will slightly increase compression (8.78:1 from 8.55:1), which my tuner doesnt mind, but do you guys have any concerns with the small increase in compression?

2014 wrx hatch
Iag stage 2 tuff mated to .005 deck d25
Stock heads otherwise, stock head gaskets
12mm oil pump vf52 rebuilt stage 2 pnp 11 blade from socalporting 1 bar internal wastegate, 1050cc inj, flex, cobb dp intake, turbo inlet, tumbler deletes on stock tgv housing.

383whp 371 wtq on e85. straight 91 oct can only pull 17 psi but get 27mpg in cali traffic. E85 22psi 21 mpg.

You'll battle a little knock getting into boost @ 3.5k rpm. But i am running a little fat on first tune. Non boost low rpm response is much better.

[pigboat_2]

Originally Posted by RedMerc

2014 wrx hatch
Iag stage 2 tuff mated to .005 deck d25
Stock heads otherwise, stock head gaskets
12mm oil pump vf52 rebuilt stage 2 pnp 11 blade from socalporting 1 bar internal wastegate, 1050cc inj, flex, cobb dp intake, turbo inlet, tumbler deletes on stock tgv housing.

383whp 371 wtq on e85. straight 91 oct can only pull 17 psi but get 27mpg in cali traffic. E85 22psi 21 mpg.

You'll battle a little knock getting into boost @ 3.5k rpm. But i am running a little fat on first tune. Non boost low rpm response is much better.

Little late to the party there bud

[vandor]

Originally Posted by GeoNV

to give you an idea of what lurks in there. and showing the parts cleaner shot so you can see all the holes that can hide metal debris.

How come the oil filter does not filter out the debris?

[BlackFighter]

Because it's pre oil filter. Oil gets sucked fron pan, into the filter, then to the crank, then heads cams and your gears.