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Has anyone swap out a ej20 single turbo to a twin turbo ej20

40K views 20 replies 7 participants last post by  Sinister  
#1 ·
Hello guys i was wondering if anybody ever swap a ej20 single turbo out of a wrx impreza and put in an ej20 twin turbo from a legacy. See I have a 1995 wrx impreza rhd which is knocking from the left head. Sounds like a connecting rod bearing. Recently I came across a wrecked 1996 legacy which is twin turbo. I wanna kno if this could be done because the engines i think is basically the same only one more turbo added.
Thanks
 
#2 ·
If I recall... they are only JDM engines. I know you can find them all over eBay pretty easy. I looked into one for my Brat.

Unfortunately, you get the same power, with twice the complexity.

plus, you'll need a compatible ECU/wiring.

You "might" run into problems clearing your brake master cylinder as well.... not sure though.

It can be done.... just a lot more complex than I think you're anticipating.
 
#4 · (Edited)
From what I remember they don't work on Left hand drive cars, because the steering system gets in the way.

Edit: Here it is the Master Cylinder get's in the way.
Ej20tt???? - NASIOC
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...
Double Edit: Look further down in that thread at post 22-24, has more information.
 
#6 ·
re twin turbo brat

I have a 90 Brat (brumby in austalia) with a 96 liberty/legacy twin turbo. All the running gear is of the donor car there is a fair bit of work involved but its not impossible. Its running full legacy driveline, suspension brakes and 16" rims. Initially the car wasnt as quick as I would have liked, however since modifying the exhaust and catalytic convertor, i.e. removing it. It is phenomanally quick. Running 12lbs on turbo 1 and 17 on turbo 2 I am confident of a 12second quarter. I have done other late model conversions on these in the past (non turbo) however this is by far the best, great fuel consumption, performance and handling. Any questions please let me know. Cheers
 
#8 ·
I have a 90 Brat (brumby in austalia) with a 96 liberty/legacy twin turbo. All the running gear is of the donor car there is a fair bit of work involved but its not impossible. Its running full legacy driveline, suspension brakes and 16" rims. Initially the car wasnt as quick as I would have liked, however since modifying the exhaust and catalytic convertor, i.e. removing it. It is phenomanally quick. Running 12lbs on turbo 1 and 17 on turbo 2 I am confident of a 12second quarter. I have done other late model conversions on these in the past (non turbo) however this is by far the best, great fuel consumption, performance and handling. Any questions please let me know. Cheers
sounds like a fun car!
 
#11 ·
A good example would be the new F450.

They also can be called "Sequential twin turbos"
 
#12 ·
Except when a bi-turbo is a twin turbo. Example: Maserati Biturbo...

Of the definitions given, "sequential" is the clearest but even it does not effectively distinguish between series compression vs. rpm-range-limited compression.

In any case, I don't care about the semantics. What I would emphasize though is that what isn't there cannot fail and there is IMO no point whatsoever in considering a twin turbo EJ motor.