MB

Cool.

My justification for my comments that I don't think you will see much more power from the ECU alone, are this...

Think of the combustion triangle in an engine, on a turbo car. You have:
1) Air flow or boost
2) Ignition / spark timing
3) Amount of fuel or AFR

By optimising these 3 safely in combination, a lot of power can be had. ie add more boost, lean out a touch and advance the ignition timing.

On an N/A car you can delete number 1 as that is just a function of how hard the engine is sucking and we have no control over it.

So you are left with the following, and these are the only things your G Reddy will be able to adjust:

1) Ignition timing
2) AFR

Now your JDM will ahve quite aggressive ignition timing anyway, so you may only be able to advance it a couple of degrees. The AFR will be nearly optimum, but lets say we can shave a point off it and go from 12 to 13 (in reality you might not be able to get this much) The top end fuelling on the S is quite rich, as with most cars, so some gain will be made.

But 15 - 20 bhp is wy beyond the realm of that in my view. To put it in perspective, on a standard UK Turbo Impreza, you could only get 20 bhp from adding about 2 psi extra boost and mapping accordingly (exhaust changes aside)

Given in the S we can't even give it any positive pressure, I can't see how you would get more than a handful of bhp.

Ultra_Nexus

Yeah, I do see it your way.

As said, the CAI will help here, as will the exhaust - both are less restrictive.

But yeah, the AFR is the key here.

I don't know about the F20C, but the B-series engines I did maps for wind the ignition back MASSIVELY as well as dropping the AFR down to 11.

I know that the AFR past 8k for the F20C is around that mark.

I was sceptical about it really, but I do have a bit more optimism.

Still, it will be interesting to see and i'll definately let everyone know the result - good or bad

eSeM

(If you use the Dyno at TDI North you might be able to make those figures at the crank from what I have seen of seen.)

We like to see rear wheel figures on here.

UK Paul

Save your money and get the TypeR S2000 coming in Feb 09 (Last flourish of 500 cars worldwide)

265 BHp & 100Kg lighter with single exit Exhaust.



Oh, I've been writing this same 'shan since 2000...... just always coming next year.......:-(

Ultra_Nexus

Ok, i'll go for a real 210-215whp.

Obviously, this would translate as 27whp on the TTS dyno

MB

Where is this info, Paul?? That sort of talk could sway me back

eSeM

I would guess at closer to 205whp on a good day.

A7DY W

I think you may be being a little optimistic Hypersonik.

I opted for the J's ECU tuned to the mods on the car.

J's 70mm Dual Titanium Exhaust
Berk Tech Decat
J's Manifold
AEM V2 Intake
J's Throttle Body.

I didnt get a Dyno done on the car prior to fitting the mods but working on the figure of ~180WHP for a standard 'S' which is arguably the realistic standard output, I achieved 201 WHP with the mods.



Andy

Ultra_Nexus

Well, with 20% losses, a jdm should have about 197whp.

I have obviously opened a can of worms

Rest assured, it'll be getting tested with/without for a comparison

UK Paul

only in my head has been for 9 years now....

I had a full spec. of weight saving measures, realistically I got to an affordable 70ish Kgs!!