I know that the UK STi has 265ps against the 280ps of the Japanese version.
To my knowledge the UK version is less powerful due to the stricter emission standards in Britain as compared to Japan.

How did they "de-tune" the engine??
If its just to curb emmissions then surely it wouldn't take much to get a UK STi to 280ps and beyond like the Japanese version.
Just a new backbox and midsection and possibly an ECU remap?

So basically if you did this would you have reverted what Subaru UK have done to de-tune it?

Thanks for any information,

Kos

 

Hi Kosy,

I'd say all the de tuning is in the ECU only. But don't quote me on this. I wonder what would happen if someone were to get hold of a Jap spec STI ECU and would plug it in.

It would be easy to extract 280 hp out of a Euro spec STI. Link or Unichip and so on ECUs, exhausts and filters, the usual stuff.

Cheers,

Wrexy.

 

Aren't the UK cars less powerfull due to 97ron fuel rather 100ron?
I'm sure the ecu settings would be different too.

Bob

 

Hi Wrexy, hows Athens?!

Bob- Yeah i think the UK ECU must be mapped for 97RON so thats a possible way that the power would be lower over here.

 

I think the ecu is actually mapped for 95ron, and from rumours ive heard, it wont be long before they are pushing 300bhp if Prodrive get their way

Tony

 

From the stuff in the Press lately apparenty the Euro STI has larger Cat which reduces the power to 265ps and allows it to met EU emmissions - I guess the ECU will be remapped for EU fuel anyway. 310 bhp should be possible with breathing changes and good fuel I guess.

Jon

 

Jon

The Japanese STi has "only" 280 BHP to stick within the gentleman's agreement that the home manufacturuers won't engage in producing cars with "excessive" power. The general reckoning is that the STi is making around 310 - 320 PS in Japan, but requires 100 octane fuel to do it. Lower grade fuel causes the ECU to retard the ignition and reduce power (like the standard WRX and PPP for the MY01 in the UK).

So how much would be available with a fully de-cat exhaust and a Link?

Duncan

 

yeah, and the 22B is 350 bhp fom the factory.

 

and thoroughly reliable

 

Sounds to me like the UK STi is gonna be a great base for a serious high bhp Scoob then

 

Well just for some info, my m8 dynoed a stock Jap spec STI MY02 in OZ on his dyno and he got 160kw at the wheels out of it, without any mods. He gets 129kw at the wheels from the MY00 STIs not modded. Sothe new STI does have more power going off the dyno. But then there is the extra weight to consider. He reckons the new Jap spec car should be around the 330hp mark.

Cheers,

Wrexy.

 

Bugeyed

We dyno tested a Jap Spec STI VII. 280 and 260lbft. Just what it says on the tin.

As pointed out earlier the same crap was reported on the 22B.

Jonathan

 

Jonathan

Thanks for setting me straight. Just for my peace of mind, what octane fuel did you use for the test?

Duncan

 

I believe the Japanese STIs also have other exhausts, as they didn't meet the European noise regulations.

 

Hi Chins,

Without getting in to an argument and with respect to every bodies info, how do you know that the dyno you used is correct? You can then ask me about my m8s dyno, how do I know if that is correct? I don't. But what I know is the old STI JAP SPEC gets 129kw at the wheels on his RR, which Subaru quotes at 280hp and the new STI gets 160kw at the wheels on his RR and Subaru claim 280hp again.

My m8 is coming to this conclusion because the new car, standard that is, is getting a higher reading on his dyno than the old car did. He would not just say this to me. What would he have to gain from this? He was the one that told me that the 22B has 280hp and not the rumoured 350hp after throwing one on his dyno. All this info came from him after I rang him in OZ to enquire about a VF30 turbo for my MY00. He advised me on a VF29 because the VF30 was suited to the new STI with the variable timing. What I'm trying to say here is that he had nothing to gain from the info he gave me about the new STI.

Cheers,

Wrexy.

 

PaW figures are hard to compare. At a recent RR day mine made 301 @crank and 220Paw. Another car made 342@crank and 221Paw...
Maybe they both made 280bhp in your example WREXY, but the MY01 was just loosing less in the transmission.
C\


[Edited by chuckster - 11/19/2001 1:43:05 PM]

 

Wrexy

The figures were taken from the Impreza dyno day we had on Saturday. There were lots of other cars there to reference, all run back to back. There has probably been 30 plus STI V, P1's etc run on the same dyno. It made exactly the same power as they did. For reference the UK300 fully decated made more power and torque than the Jap spec STI. My UK300 with PPP was 22bhp and 12lbft short of the STI.

Hopefully in a few months we will have other to compare against, but on this first showing Subaru have left the power alone.

From my side I would love to have seen the STI produce the press claimed 300+bhp. Maybe that would of convinced me the STI is sufficently more powerfull than a UK car with PPP. What you did of course see is that low down the UK cars had loads more torque.

Jonathan



[Edited by Chins - 19/11/2001 20:32:42]

 

Jonathan,

Since you did have other cars to compare with, I now see that you do have concrete info that you provided. It is very confusing. I will again discuss with my friend in OZ, the identical figures the old STIs and the new STIs are getting in the UK. And why he got such a difference between old and new. Chuckster is probably right. Maybe the new STI loses less through the tranmission. The RRs in OZ don't have the facility to give out flywheel power. Only power at wheels. That's where the difference may be.

Cheers,

Wrexy.