The stock cylinder head would have no problem sustaining the airflow required for 11,000 rpm and the intake manifold probably wouldn't have any issues either. There is more to be gained with porting, but the stock head is the best Honda head ever (which is saying a lot considering how good Honda heads are compared to other marques).

But, with the stock cams, the power peaks (even with tuning) around 8500 rpm. By 9500 rpm revving any higher would be pointless except in certain track situations (overrevving on a short straight between corners for example where a shift up and down is not warranted). The key is the camshafts (and of course the ECU tuning is the big limiter right now). The Toda cams don't appear to be designed to take advantage of a significantly higher rev limit so they probably wouldn't be what you wanted if you were going full bore on this engine.

As an example of the kind of all motor power available for an all out app (this is an old graph, but I couldn't post it till recently when the owner went to a new motor and released the data to the public)...



This is what a 2.0 liter B-series engine can do with a cylinder head that doesn't flow as much as the stock S2000 head. These guys would be making 20-30 hp more easily if they could get more flow and they're still running a smaller bore than we are. They also retain a throttle body (no individuals), use a modified OEM ECU (Hondata) and retain VTEC. The car actually idles at 1500 rpm and the VTEC switch is at 8000 rpm. Sure, it runs race gas and 15:1 (or more) compression, but it's still a stock crank, stock distributor, etc, etc. The key here is the cam tuning and the ECU tuning (and a terrific engine builder - Erick's Racing). The new 2.2 liter version of this motor is even scarier.

An F20C built to the same level as this motor would easily surpass 350 whp and rev well past 11k rpm (the B-series engine is usually shifted just before 11k). Edit - the motor above makes about 180 lbs-ft of torque.

BTW, the only guys who have head data on the F20C are Alaniz Technologies. Import Builders has talked with them in the past, just make sure that if they're doing head work, that's where it goes. We'll finally be getting someone with a pure before and after on the cylinder head around the new year, so stay tuned (fingers crossed :-).

UL

 

UL,



Fingers and toes.

 

U L,
What kind of torque does that b series engine make?

I'm assuming it's all motor.

I have also been meaning to ask you a question about my engine.

I am worried. When I rev it well into VTEC land i think I can hear a metallic-type sound. Not much in first gear (Maybe bacause there isn't much stress on the engine), but more in the upper gears.

Sounds to me like bad lubrication, but then again I know nothing.
It is just a violent sound, and I haven't had the opportunity to ride in another S2000 in the two years that I've had mine.

I am wondering if the dealer's 800 miles or so could have had something to do with the problem. That was the original mileage on the car.

Please give me something.

Barrett.

 

I don't think you have anything to worry about incubus. In VTEC there is a cacaphony of unusual sounds. A valve adjustment couldn't hurt, but if it hasn't gotten louder or worse, don't sweat it too much.

UL

 

Thanks a lot U L.

I have tried s many times to get an adjustment.

I get: That sound is normal. Even though I didn't ask them to listen to it. I asked for them to check the clearance of the valves.

I guess the dealer will have to look at it.

Thanks.
Incubus.