I know that the BHP is 240 on the S2000 but the RWHP only registers in the high 190's or very low 200's. I want to know if anybody has had any success in aftermarket parts that put more of the engine's power to the ground a.e. carbon fiber drive shaft, different transfer case etc.

 

you'll always lose a certain % of the flywheel horsepower when its transferred to the wheels.

a cf driveshaft or something similar would only help the motor reach the power much quicker by lightening up the drivetrain.

btw, we don't have transfer cases =D this isn't a 4WD vehicle.

 

Lighter weight - well...lower inertia really - rotating parts (drive shaft, flywheel, wheels...) will make a difference in power to the ground as measured on a dyno, and as felt in acceleration, since that's all based on how quickly you can change the speed of the wheels. However, I don't really know of many parts to do this except wheels. BTW, a driveshaft has such a relatively small diameter, that lowering it's inertia noticeably would require a drastic change in construction and material, read expensive...

There are many easier ways to get some power, and this won't get you much. A 20% loss from flywheel to the ground isn't bad. Also, we can't really verify what the engine is making at the flywheel, we just take Honda's word for it and assume "240 hp" even though everyone's engine is different and any one may make less - or more.

 

Have you considered 4.44 or 4.77 rear gears?

 

I thought about changing the gears, but I am concerned about the fact that I would be shifting too many times, so you know at what mile per hour you need to shift in first gear with 4.44 or 4.77 gears?

 

I shift by "tach" not by road speed so I couldn't tell you. There are speed calculators available if you want to know the speeds in each gear. Here's a thread I started that talks about all kinds of stuff after a 4.44 gear swap:
https://www.s2ki.com/forums/showthread.php?...&threadid=85331