Found this on the WRX Facebook group and I think it'd a good article for this new to WRX's and tuning and who want to increase their knowledge. (knowledge is power!) The Truth Behind The Subaru EJ-Series Engines - Tech-Knowledge - Import Tuner Magazine

Disclaimer : it's American so there's plenty of self promotion.

A mate sent me a link to this today and had a few peeks at work. Looks like they're mostly referring to the 2.5, although I might not have gotten far enough into it yet.

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Air is for pussies.

If i had to boil it down, it really suggests that the "tuner" is key.

Good read ,worlds fastest 05 sti 7.75 secs at 175mph bloody hell...........

That record seems to be only listed on the AMR website and not in any records anywhere else, it's also a 2008 STi according to them, as well as being a registered NHRA drag car...also there is no evidence of the said 175mph and 7.75seconds...
Here read on, around page 9 they claim the performance just jumped from a 10.54 at 142mph to the said 7 seconds and then its naisoc popcorn time:

AMR 2008 Subaru STi - 1.9-2.0 60ft - 142.39mph - (unedited video) - NASIOC

they have video and evidence of all their runs but the said 7.75.


I read this import-tuner article a while back, I don't trust it, it's like a sales pitch for these respective houses, I trust my local tuner he's the pro here!

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06 STi: 337hp @23psi on E85...
06 STi: 309hp @22psi on 98ron...

here is a sister article for everyone:

How to Avoid Blown Ringlands in your Turbo Subaru

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MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport

Dam the Internet and its lies........

1/4 mile or 1/8 mile?

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Bye bye betty blue. Hello F6.