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Old 02-24-2005, 02:08 AM   #1
ryuwrx
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Default Ej20tt????

Which Japanese Subaru came with an EJ20TT!!!!

http://www.attarco.com/this_just_in.htm
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Old 02-24-2005, 02:27 AM   #2
Calebz
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Liberty RS

Not a very good fit in LHD cars though
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Old 02-24-2005, 03:25 AM   #3
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Quote:
Originally Posted by Calebz
Liberty RS

Not a very good fit in LHD cars though
If its from Australia then its called the Liberty, in Japan they were still called the Legacy. I think the years were 93 to 98, which is the US 95 to 99 body style.
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Old 02-24-2005, 07:34 AM   #4
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Legacy GT-B and IIRC some B4 Models as well.

no idea how they'd fit in a USDM Legacy Model......
could be interesting

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Old 02-24-2005, 10:42 AM   #5
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Ah, I see. Thanks. I had a feeling it was a Legacy.
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Old 02-24-2005, 11:39 AM   #6
Matt Monson
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Won't fit LHD, master cylinder interferes. It is a good engine, but you would want to use normal WRX/Legacy Turbo exhaust manifolds and a single turbo on it...
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Old 02-24-2005, 11:56 AM   #7
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I've ridden in one, there is a nice valley read (dead spot)between the turbos
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Old 02-24-2005, 04:16 PM   #8
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Why make a twin turbo EJ20? What's the benefit of TT over a single turbo on the EJ20?
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Old 02-25-2005, 12:47 AM   #9
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Quote:
Originally Posted by ryuwrx
Why make a twin turbo EJ20? What's the benefit of TT over a single turbo on the EJ20?
If the turbos are sized correctly then you could have very little lag and big power. Use a small turbo to spool up down low, and then a big turbo to get better power near the top.

I have seen a twin turbo motor in a 96 USDM legacy, the guy had to make a custom exhaust manifold for the drivers side. Its way to much work when you can just get an STI motor for so little.
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Old 02-25-2005, 09:52 AM   #10
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^^ what he said. The car I rode in, if you shifted incorrectly, you would end up in the valley between the two turbos, and would have to wait a second for it to build up boost on the bigger turbo.
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Old 02-25-2005, 11:05 AM   #11
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So are the turbo's run sequentially? (Last question I swear.)
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Old 02-25-2005, 12:31 PM   #12
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Primary turbo only up to about 4000rpm then both turbos together.
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Old 02-25-2005, 09:01 PM   #13
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Quote:
Originally Posted by ryuwrx
So are the turbo's run sequentially? (Last question I swear.)
yes it is a 2 stage sequential system, jdm models produce about 250-260hp.
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Old 02-26-2005, 02:47 PM   #14
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Awesome, I feel much more enlightened now.
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Old 03-11-2005, 05:26 AM   #15
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Quote:
Originally Posted by timmah
^^ what he said. The car I rode in, if you shifted incorrectly, you would end up in the valley between the two turbos, and would have to wait a second for it to build up boost on the bigger turbo.
You can alter your secondary actuation point easily, so theres not as big a drop. It does make the cars less responsive off the line as a downside, but up top they pull more smoothly form 4500-7000rpm
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Old 03-11-2005, 09:11 AM   #16
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How??
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Old 03-16-2005, 12:16 AM   #17
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Quote:
Originally Posted by duncangrant
How??
Smaller turbos take less exhaust pressure (higher RPM more pressure) to build up boost but don't put out as much PSI as a bigger turbo, which bigger turbos take more exhaust pressure to put out the PSI.

Anyway $900+ for an EJ20tt must be crappy engines or missing the turbos and IC and ECU, I'll have to look at the site harder.
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Old 09-19-2007, 03:55 PM   #18
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Old thread, but can this JDM ej20TT mount into the same place as all the other imprezas? And can the twin turbo be easily changed to a single turbo as to not have the master cylinder interference?
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Old 09-22-2007, 09:54 AM   #19
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bump.
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Old 09-22-2007, 08:06 PM   #20
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Yes, the motor fits mechanically, the problem is with the manifolds. As long as you switch to a single turbo manifold setup, you can use this motor.
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Old 09-29-2007, 12:53 AM   #21
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Okay, bump.

EJ20TT = EJ20H/EJ20R.

Was used in the Legacy from 1993 to 2002-3 So basically all turbocharged 2nd and 3rd generation Legacy models.

To be honest you don't want a twin snail. They are the most complex and unreliable turbocharged setup that Subaru ever made. Then there is that lovely dead spot mentioned earlier called the Valley Of Death. But they do haul. I've driven a GT-B with no limiters at all and 200km/h was achieved uphill with ease and it was still pulling. Oh and the fuel needle drops faster than gravity when the secondary turbo gets involved at all.
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Old 10-01-2007, 01:16 AM   #22
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I have a JDM LGT spec B TT motor in my bugeye.

Crappy things:
Motor mounts are different
Inrake manifold/TB are different
Tranny bolt pattern is different.
Drivers side turbo doesnt fit.
They dont have an oil cooler.
Crank and cam position gears are different so USDM ECU wont run it.

Good things:
Better pistons, bigger valves, better cams, no TGV's, side feed injectors, higher redline, better timing belt setup, better timing gears, much better rotating assy balance, more balls lol

So after converting it over to single turbo, a ton of work to get the USDM ECU to run it (custom TB adapter, custom cam gear, etc etc) it will go in lol
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Old 10-03-2007, 10:27 PM   #23
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Quote:
Originally Posted by Turbo_Mike View Post
I have a JDM LGT spec B TT motor in my bugeye.

Crappy things:
Motor mounts are different
Inrake manifold/TB are different
Tranny bolt pattern is different.
Drivers side turbo doesnt fit.
They dont have an oil cooler.
Crank and cam position gears are different so USDM ECU wont run it.

Good things:
Better pistons, bigger valves, better cams, no TGV's, side feed injectors, higher redline, better timing belt setup, better timing gears, much better rotating assy balance, more balls lol

So after converting it over to single turbo, a ton of work to get the USDM ECU to run it (custom TB adapter, custom cam gear, etc etc) it will go in lol
1) Do you need the 97 mounts (or whatever year the engine it from). I thougth they share the same mounting points

2) Can't the turbo piping be rerouted to compensate for the master cylender?

3) Tranny bolt pattern mate with my 03 RS? Or be custom fitted (tap & dye set)

4) Does the USDM ECU not work because the wire harness doesn't mate? Can it be spliced/soldered to the propriate wire?

I'm looking into getting an EJ20 TT from a JDM 95-97 Impreza to go into my 03 Impreza RS. I have adaquate knowledge of automotive system and have a WRX ECU coming my way. Will it work?
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Old 10-04-2007, 12:53 AM   #24
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Quote:
Originally Posted by SPDR View Post
1) Do you need the 97 mounts (or whatever year the engine it from). I thougth they share the same mounting points

2) Can't the turbo piping be rerouted to compensate for the master cylender?

3) Tranny bolt pattern mate with my 03 RS? Or be custom fitted (tap & dye set)

4) Does the USDM ECU not work because the wire harness doesn't mate? Can it be spliced/soldered to the propriate wire?

I'm looking into getting an EJ20 TT from a JDM 95-97 Impreza to go into my 03 Impreza RS. I have adaquate knowledge of automotive system and have a WRX ECU coming my way. Will it work?
1) mounts just need to be changed to the car you are mounting it to, block will accept the mounts.

2) no, brake master, brake booster, steering shaft are all in the way. with a LOT of fab work, it can be done, but its not going to be easy

3) drill, tap, die, you can make it work. the existing holes in the block DO match up to the ones in your tranny. the lower starter bolt is the main issue. it threads into the tranny in the JDM setup, where it threads into the block with the USDM tranny. so thats the main one that needs to be fitted, the others dont especially matter

4) the injectors are the only thing that will pulg in, and they need to be modified a little too. the TT motor doesnt have tgv's, the IAC motor and tps are different, but the main issue are the cam and crank position triggers, which have different number of triggers and different locations. the wrx ECU cannot work unless you modify the cam gear and replace the crank hub to provide correct wrx position signals to the ecu. but by using wrx sensors, wrx tb, and wrx wire harness, it can be done... I did it.
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Old 10-04-2007, 04:24 AM   #25
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Not too much work.
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