Can someone tell me the specs on a jdm s2k? i know they produce a bit more power, also if you know please give me how this is achieved? what is the difference?

thanks

 

They produce around 250hp (184kw) and have slightly more torque than our models 161lb-ft (217nm). They're also lighter, weighing in at 1240kg as opposed to 1259kg for the Audm model, which I assume is the same weight as the Usdm model.

As for how they produce more power, I can't help you with that unfortunately...I know that Japan gets better fuel than just about anyone, their regular unleaded is 98 octane and their "premium" is 100 + octane I hear...so I guess the Jdm S2K is tuned for that.

I do have a clip of BM running the Jdm S2K to a 14.029 second 1/4 mile, with the top down no less. Since they are lighter, and with extra power (however slight) I would assume the Jdm S2K is easier to run 13's with.

I actually had the opportunity to test drive a 2001 JDM S2K before purchasing my current one and definitely noticed the power difference, especially down low.

 

JDM S2000 weight: 1240kg 2000-2003, 1250kg 2004-. Extra weight in 2004- comes mainly from increase of wheel size i think.

More power is due to higher JDM compression rate: 11.7

 

Is there a way to match this compression? How can I get these parts? 161 of torque!!!!!! great.

 

Engine tuning differences world wide were done to match up the differences in octane ratings of gasoline. Japan is 100, Europe is 98, and the US is 95. US cars are quoted at 240bhp (per Honda sales brochure

 

I think there have been far too many disparities when making conversions between hp/kw/ps figures. They become #'s thrown around by manufacturers to look pretty on brochures, marketing hype and whatnot. I'm also pretty sure that the UK S2K is the same as the one we get in AUS. The AUS one has been reported @ 240bhp also, which roughly equates to 176kw. Going by performance numbers and whatnot, it'd be safe to say...bar the JDM version, exported S2K's are all pretty much the same. Forget the websites/brochures. The US S2K is reportedly heavier however, like most of their H/A cars (ITR comes to mind) weighing in at 1275kg as opposed to 1259kg for the Aus version.

Aussie fuel is also rated @ 98 RON for premium unleaded, again like the UK/Euro. So it would sense that our cars are tuned just like the UK version.

 

there are lots of small differences between the various regional spec cars..I am gradually finding more and more as I imported my JDM to Europe.. I think even the battery is a bit smaller than others? some of the differences seem very stupid

I did not realise the car was lighter? why would this be..

the JDM has different pistons which gives the different compression ratio..you can still get this extra horsepower with lower octane fuel as long as the knock sensor does not retard the timing...and that can happen with many different circumstances..

 

On the subject of weight differences:

My car is a stock 2001 and it was weighed at AYA racing with me in the driver

 

Some of my notes on differences....

ENGINES Japan has F20C engines, the US F20C1s, and Europe F20C2s. According to Honda nomenclature those are different engines not just some sort of localization scheme. No one has gotten around to find exactly what the differences are, but some suspect pistons are not the same and marginal lower compression.
Footnote: Per an Australian who has a Japanese spec car, it has a higher compression ratio due to domed pistons. It has two knock sensors as opposed to one on Australian spec cars but this is not a problem as the Aus spec wiring harness has a resistor where the second knock sensor input would go to simulate its function. The Aus spec has VETC oil sensor where JDM spec does not. This can be simply corrected by pulling out the dummy plug bolt in the JDM engine and screwing in the sensor off you previous engine. The wiring harnesses are identical with the exception of the few resistors previously mentioned.

SPEED LIMITER Japanese cars are limited to 180kph or 112mph; however, this is easily bypassed for a nominal fee at most aftermarket tuning workshops anywhere in Japan.

GEAR RATIOS Very early Japanese cars had different ratio

 

and it does not stop at the engine..

there are also small aero differences.. the JDM's don't come with the front spats and the rear deflectors under-neath the car. My only conclusion for this is that these only come into play when the speed exceeds the 180km/h limiter anyway..therefore not needed.

Japan did the spark plug recall.. but not the oil jet/bolt recall ? However they did do some hub/nut recall during 2001.