02 WRX engine into Legacy turbo? Anyone did it?

ej22t · Post by **ej22t** » Tue Jul 04, 2006 4:36 am

A friend of mine planning to sell his WRX engine to me since he will put a JDM STi engine.
My question is does anyone tried to put a USDM WRX engine into a 92 Legacy turbo and any problem will be happened if I keep using the stock ECU? He also has the WRX ECU but don't have the wire harness for our BC legacy.
Will that be very hard to put it into a Legacy turbo or it will be as easy as like swap a EJ20G engine?

Ben

Splinter · Post by **Splinter** » Tue Jul 04, 2006 5:01 am

Dont.

You've got a far superior block.

Take his turbo, maybe his heads.

ej22t · Post by **ej22t** » Tue Jul 04, 2006 5:15 am

Could you tells more advantage and disadvantage about this swap, I can't find any information about the WRX engine swap!!

Thanks!

Ben

napphappy · Post by **napphappy** » Tue Jul 04, 2006 6:36 am

The wrx has better flowing heads but, a weaker block.
To use the wrx heads or engine with your stock ecu, you will need to at least modify the cam gears.

It is Much easier to do a ej20g swap.

ej22t · Post by **ej22t** » Wed Jul 05, 2006 6:22 am

Will it be possiable to do the swap?
I know the EJ20G is the easier way but for the chance to get the WRX with the ECU, its hard to refuse to swap it!!!
Tell me how hard and impossiable to do it and make me reject my friend's offer, I know I am short on money but the engine is lovely to have on a BC Legacy turbo.

Ben

Splinter · Post by **Splinter** » Wed Jul 05, 2006 7:02 am

Dibs on your EJ22T block if you do the swap

gt2.5turbo · Post by **gt2.5turbo** » Wed Jul 05, 2006 7:02 am

buy the swap.... sell it for more as a swap and get a ej20g swap

93forestpearl · Post by **93forestpearl** » Wed Jul 05, 2006 6:43 pm

You will need both complete wiring harnesses out of their respective cars to do the swap. After dozens of hours unwrapping all the tape, swapping connectors, and splicing wires, you'll regret your decision to put an OBD II engine into your legacy.

Why in the world would you want to give up a beefy closed deck turbo motor (EJ22T, EJ20G) for something that wasn't designed to reliably support as much power (EJ205, WRX). Its pure blasphemy.

ej22t · Post by **ej22t** » Thu Jul 06, 2006 6:10 am

I just blow my EJ20G on the track day and now I don't have too much choice for the engine option, I could find a used EJ22t in local but the problem is noone knows how many KM on the engine and I am also don't wanna put in a ej20g since the price is higher then the ej22t.
My friend just has his USDM WRX and a twin turbo Legacy in his shop, for the easier swap I would like to choose the WRX!
Does anyone know that the Twin turbo block will fits with the EJ20G head?
Did anyone did it and hows it feel?
Thanks for all the help!

Ben

douglas vincent · Post by **douglas vincent** » Thu Jul 06, 2006 6:33 am

The twin turbo block is very nice. No proof, but I own one! Its sitting attached to a motor stand awaiting an owner.

napphappy · Post by **napphappy** » Thu Jul 06, 2006 6:43 am

The twin turbo longblock should work fine. Just use the EJ20g intake manifold, wiring and turbo setup.
Its give and take.... The TT block is open deck, but the heads are an improvment over the "g" heads.

ej22t · Post by **ej22t** » Thu Jul 06, 2006 8:40 am

Could you guys gives more detail since no one in here knows how to do installation of the Twinturbo engine, since it wouldn't direct fits to the engine bay, What kind of modify I have to do before I put it in?
Should I just take off the TT head and put the EJ20G head on it? which head gasket should I use and any other things I have to caution about!
I really want make my car alive, I did lots on the handling and I love this car more then other Subaru at this moment....
Please help!

Ben

93forestpearl · Post by **93forestpearl** » Thu Jul 06, 2006 8:10 pm

The March '04 issue of Sport Compact Car has a pretty detailed writup on swapping a WRX engine into an older Subaru.

Matt Monson · Post by **Matt Monson** » Thu Jul 06, 2006 11:41 pm

Ben,
To install the TT block into your car, just remove the exhaust manifolds and intake manifold from the TT block. Now you have a longblock sitting on your stand that is dimensionally identical to your Ej20G.

Take out your Ej20G, remove intake manifold and exhaust and install on TT longblock. Install in car.

Don't switch heads or any of that jazz. Just drop the longblock in the car as is...

ej22t · Post by **ej22t** » Fri Jul 07, 2006 3:33 am

Hay matt, thanks for your info. Have you done this before, if you did, how it feels?
I know the TT won't fits since the second turbo is blocking on the brake booster.
How can I use just one turbo from my EJ20G? Will it work if I only use one turbo?
Also, what should I swap from my ej20G?
As Downpipe will fits or not?
THanks for your help again!

Ben

ej22t · Post by **ej22t** » Fri Jul 07, 2006 3:49 am

Soory, more question to you Matt. How about the wire problem? Can I just use the stock EJ22T wiring to run this EJ20TT engine?

Thanks for answer.

Ben

ej22t · Post by **ej22t** » Wed Jul 12, 2006 4:35 am

Anyone could answer my questions??

Thanks

Ben

douglas vincent · Post by **douglas vincent** » Wed Jul 12, 2006 5:32 am

The twin turbo block, at least if you have the one I have, uses the same sensors. Its pretty much plug and play. You will have to double check some wiring, but the cam sensor and the crank sensor are the same as our EJ22 wiring. You will have to plug some oil/water stuff on the driver side head. You will have to adapt a section of the fuel rails (compare and you will see).

SWAP OVER THE TWIN TURBO THROTTLE BODY!!!!!!!!!!! It is way way to small. Takes some work.

ej22t · Post by **ej22t** » Wed Jul 12, 2006 8:52 am

douglas, Thanks for your reply, I do have a TT block in the shop but some of the step I am not too clear if I do the swap.
How can I use the TT block become a single turbo?
What should I take off and what shold I put on from my EJ20G to the TT block?
Please help and hope the car alive soon.

Thanks again!

Ben

corsair · Post by **corsair** » Wed Jul 12, 2006 3:19 pm

<-moron

Matt Monson · Post by **Matt Monson** » Wed Jul 12, 2006 3:25 pm

corsair wrote:Ben, what everyone is saying is just take everything (heads, turbo, etc) off the twin turbo block and just use what remains. That would be the SHORT BLOCK, which is the block itself including the pistons and crank etc. Take that and swap it in for the EJ20G SHORT BLOCK in your car. Keep everything else from your EJ20G and just bolt it up to the twin turbo block. You'll be left with what was essentially your EJ20G but with a slightly weaker block.

BTW, the twin turbo isn't an EJ20-TT, that isn't the correct name. I believe it's EJ20H.

No, that's not what we are saying at all. We never told him to remove the heads. Why on earth would one do that??? He just wants to remove the intake manifold and exhaust manifold off of his Ej20G and use that on the new engine.

Ben,
The turbo ( or turbos) are directly related to the exhaust manifold. If you change to the single turbo exhaust manifold, then the single turbo bolts right up. I don't know how to make it any more clear than that.

corsair · Post by **corsair** » Wed Jul 12, 2006 3:30 pm

Sorry Matt.

Derp.

I wasn't quite using my reading comprehension skills.

napphappy · Post by **napphappy** » Wed Jul 12, 2006 5:44 pm

As for the Drivers side head. Holes to plug.

The two banjo lines are easy to plug, its just a bolt. Use, the bolts that plug the oil galleys on the "g" heads.

As for the oil return, you can do it two ways. One, find someting to plug the line. There isnt too much pressure in it, but you dont want it to leak air.

OR, what I did. Pull the return line out of the head(its pressed in, may be hard to get out) Then, use a 3/8in Pipe thread tap, and tap the hole. The hole is pretty close to the right size already. 3/8NPT plugs are pretty easy to fine. I would use some teflon tape when you install it.

phil-allen · Post by **phil-allen** » Wed Jul 12, 2006 7:32 pm

http://www.sportcompactcarweb.com/tech/ ... rx_engine/

If you dont use the info provided on the page. the article still makes for an interesting read.

-phil

ej22t · Post by **ej22t** » Wed Jul 12, 2006 7:55 pm

Thanks all!!!!
YOu guys are the best. Thanks Matt and Phil, I will talk to my man and see what we can do, I will let you guys know what will the swap goes and maybe have to ask you guys more questions!

Anyway, thanks!

Ben

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02 WRX engine into Legacy turbo? Anyone did it?

02 WRX engine into Legacy turbo? Anyone did it?

A link to the write up