http://www.s2ki.com/forums/showthrea...hreadid=123834

 

The guys (or gals) on vtec.net surmize that not much more power but 10 - 14 lb-ft additional torque with same 'F' series engine.

I think this puts it a shade over 175.

 

Where do you get your info? The 2.0 liter S2000 puts out 240 at the crank.

No numbers on the 2.2 liter yet though.

 

He meant torque, not hp.

2.2 is 10% bigger than 2.0, so if you assume hp/liter and torque/liter are constant, you get 168 ft-lbs and 264 hp.

 

I read somewhere that the S2200 will be a hardtop and output 250hp at the crank, say bye to 120hp/L. No word on torque though...

 

theres no replacement for displacement (F.I. asside)

 

Road & Track Article

 

I agree with the article. I really like the looks of the coupe version there. I would buy the coupe. I would never buy the convertible. If that's the car they're puttin' out, that looks sweet! Can't wait to see them.

 

Is it just me or does the S2200 pictured at the bottom of the article look like a 350Z?

 

i am all for a coupe, and maybe its the angle of the pic, but damn. Bring back the drop top cuz that coupe is butt ugly

 

So is Honda going to stroke the engine? That would explaing the small increase in power.

 

Good point. But it would make a bigger difference in torque, which is what everybody complains about in the S2000. I wonder if a longer stroke would mean a lower red line too. That would be a shame.


I was thinking that supposed S2200 looks more like the original 280Z than the 350Z does!

 

maybe this is the same thing, but wouldnt a few millimeter overbore on the cylinders help with the displacement too? Either way i think we can all agreee that that little thing can move, its just too bad all it's power is at the top. I just dont think i can get past the fact that it is a $30k honda. Just me though

 

...has it been confirmed then that the displacement increase is in the stroke??

nope. stroking and boring pistons two different things. to run the same rpm on a longer-stroke crank (and con-rod), your piston speeds increase quite a bit more, which means your loads on your con-rods increase like-wise. but, with the larger diameter crank, you're getting more torque per turn. basically, if you stroke an engine, you're going to get better torque(longer crank radius, more force on piston), maybe more power (depends on a lot of things), but you're not going to be able to rev it as high, all other things being equal (ie, max piston speed).

if you bore the cylinder out (what i wish they'd have done, unless they did), you're going to get a larger displacement, and a larger area upon which the gases can press (assuming equal pressure as the smaller bore, you're getting a proportionately larger force) you then end up with a larger force on the same lever (crank radius). this too will help with your torque, but becuase the piston travel isn't as long, you can make a lot more power as piston speeds don't increase (as the stroke is the same), and with the extra force at all rpm, your power goes up considerably.

of course, this is the mega-basic over-simplified approach, but includes a few of the major factors, outcomes, and considerations.

 

are you saying that if in fact they did bore out the cylinders then you would wish for a stroker instead?:p

 

why would i wanna do a crazy thing like that?? void my warranty???? forget it :p

...i was saying i can't really wish for something that they've done... hahaha...

 

A bigger bore means a bigger piston, means a heavier piston, means more stress on the conrods, means less rpms, all else being equal.

---jps

 

true, it's less, but not much... the increase in the mass of the piston is grams for 2mm overbore. but yes, i forgot to add the heavier bit :o...

 

I could be wrong, but I don't think the 2.0 had enough cylinder wall thickness to bore it out. I think they either stroked it or went with a whole new block.

 

oh, that's certainly the way most of these tiny engines are cast today: with "just enough" wall between the cylinders... some are, but it'd be piston-ring on piston-ring (i hear that's bad or something) if all the cylinders were bored out 2mm on that F block, which is probably why it was thought (is for sure?) that they stroked it...

 

This is heresay but I have been told that the F20C crankcase has very thick cylinder walls compared to other Hondas. Of course, these are aluminum cylinders so they will not be as thin as steel or iron cylinders. I do know the engine is quite long for its displacement so it leads me to believe that the are some beefy cylinder walls present.