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> Subaru engine, Which one
r_towle
post Jan 12 2016, 07:51 PM
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When did the WRX STI motor start?
Thought it was 325 hp back in the early 2000,s?

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cwpeden
post Jan 12 2016, 08:39 PM
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Don't want to hijack but... If one was to complete a build using one engine and then decide to switch to another engine down the road for more power.

Is there a resource for which engines fit which transmissions and would the engine/trans mount locations need to be changed if going from an EJ to EZ or EX? Or early to late?
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Chris H.
post Jan 12 2016, 10:06 PM
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QUOTE(cwpeden @ Jan 12 2016, 08:39 PM) *

Don't want to hijack but... If one was to complete a build using one engine and then decide to switch to another engine down the road for more power.

Is there a resource for which engines fit which transmissions and would the engine/trans mount locations need to be changed if going from an EJ to EZ or EX? Or early to late?


If you're talking about a Subaru transmission, pretty much any 5MT will bolt up to an EJ, EZ, etc. The clutch kit and flywheel are matched to the trans, so you would just move that to whatever engine you swapped to. Engine mount locations are universal too. The only engine that is a tight fit with the universal cradle mounts that are available is the EG33. It fits but nearly touches the front firewall. You could us a spacer to push it back a bit if you wanted. The rest are fine from 2.0 to 3.0L (not sure anyone has completed a 3.6 yet (IMG:style_emoticons/default/idea.gif) .
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matthepcat
post Jan 12 2016, 11:39 PM
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The Subaru STI started in 1999 in Japan but didn't come to America until 2004.

Official power output has never been above 315ish on a stock street version.

QUOTE(r_towle @ Jan 12 2016, 05:51 PM) *

When did the WRX STI motor start?
Thought it was 325 hp back in the early 2000,s?
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partwerks
post Aug 13 2022, 09:58 PM
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QUOTE(matthepcat @ Jan 12 2016, 08:08 AM) *

(IMG:style_emoticons/default/agree.gif)

The WRX motor 2006+ is even the same displacement as the STI motor but cheaper.

The EJ207 I suggested above is just the JDM version of the STI. Both motors great for power. My suggestion on adding forged Pistons is only if you wanted a big turbo and big power. It's not 100% necessary, but at big turbo/high boost the EJ motors have a known issue with ring land failure. My daily driver is an 06wrx and I have been running 15-17 PSI on the engine for its whole life (now at 117,000)


What is the displacement of the 2006, WRX EJ207?
Also, is a twin scroll turbo an option for fitment?
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tazz9924
post Aug 14 2022, 09:45 AM
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2.0, not sure if they were twin scroll or not, i dont believe so. But you can always make it happen.
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914GTSTI
post Aug 14 2022, 02:58 PM
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I have run a 1996 JDM V2 STI in a Forster and it was great. I used the harness from that 1/2 cut and ecu. That is the way I will go for my build and I will be using the Subaru 5 speed.
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Justinp71
post Aug 14 2022, 11:22 PM
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If you want simple run the stock computer, OEM Harness and have Busaru redo the stock wiring harness. They will help you with the immobilizer to as I recall. I did a EJ25 swap this way, super easy. With new exhaust and intake they are like 180hp+.
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