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j/k

tronvex

Japanese does have a higher compression then US spec. It was something like 12.1.1 or was it 11.7.1??? Anyone want 100 octane?

ASM Stook

F20C JDM engines are 11.7:1 compression, US spec F20C and F22C1 cars have 11:1 I believe. I don't know if that changed when Japan started using the F22C1 in 2006 though, I think it might have been decreased to 11:1 as well.

INTJ

My understanding the ecu has a map to compensate for the better octane. EU just uses a different rating system, but they do just like US/Can have high octane available at some retailers.

Ultra_Nexus

The US and EU S2000 both have 237bhp (240PS)

The EU only has the AP1 with the F20C, but the suspension changes did carry over in-line with the US and Japan.

The JDM S2000 has 250PS (247bhp) thanks to it's higher 11.7:1 C/R (11:1 for US and EU)

Our 97RON is equivalent to your 93 Octane.

We can get 99RON (95 Ocatne) throughout most of Western Europe.

There are even a few stations in the UK that put out 102 RON - that is beyond what the Japanese have.

Please do bear in mind that we pay $8 a gallon for our normal 95RON fuel.

Super Unleaded (High Octane) is closer $9 and that is with our dire exchange rate between

sabelotodo

um...so jdm f20c + ap2 suspension = ?!

Ultra_Nexus

I'm quite happy with the aggressive setup of the original AP1.

And my JDM Spec F20C

I will tell you this though - there is ZERO noticeable difference between my car and my friends S2000. Both of us own MY2000 JDM AP1s, except he has a UKDM F20C with the 11:1 C/R.

Zero difference all the way up to 140.

sabelotodo

hmm im thinking my04 + jdm f20C

i used to own a 2001 berlina before my04 ap2 and i can feel a difference at the limit in autox and high speed corners

Ultra_Nexus

Seriously - don't bother with the JDM engine.

You will notice no difference