600 WHP Honda S2000

[S4TAN]

From what I've read elsewhere drivetrain/transmission losses go down (measured as a percentage of total power) as the power goes up ... e.g. a stock S4 with 265bhp could lose ~25% through the transmission - giving ~200bhp at the wheels (~65bhp loss)... but a modded S4 with 440bhp wouldn't lose 25% through the transmission as this would mean a loss of 110bhp, and apparently the drivetrain would literally melt if 110bhp was being lost through it (by friction and heat) ... it's more like an ~18% loss, giving 360bhp at the wheels ...

This kinda ties in with my car - it's got SMICs, and SMIC'd cars suffer on dyno's - Doug reckoned my 415bhp reading was too low because the car was suffering from major heat soak on the rollers, and the dyno's cooling fan/air flow wasn't that great - he reckoned it would probably be around the 430bhp mark on the "real" road.

This gives an 18.5% loss through the drivetrain on my car at it's current power level rather than a 25% loss.

[rikrose]

It's "roughly" a constant. We lose C + (k * how much power we're outputting). so, the drivetrain will lose some constant, plus an amount that's relative to the power we're outputting. k ish likely to be a function rather than a constant, but without a bunch of points plotting wheel versus crank output, I can't really begin to guess, although C of 50 and k of 0.05 seems about reasonable, if the power is measured in BHP.

Did everyone see the new Ariel Atom with the supercharged v8 that revs to 10k, outputting 500 BHP...

[S4TAN]

the drivetrain will lose some constant, plus an amount that's relative to the power we're outputting

Pretty much what I said then: - a fixed loss constant plus a variable that's proportionate to the total power means the absolute loss will go up, but the loss measured as a percentage of total power will go down ...

[GardinerG]

Did everyone see the new Ariel Atom with the supercharged v8 that revs to 10k, outputting 500 BHP...

Jeffw mentioned this, but I've not seen it yet...

[rolskii]

the drivetrain will lose some constant, plus an amount that's relative to the power we're outputting

Pretty much what I said then: - a fixed loss constant plus a variable that's proportionate to the total power means the absolute loss will go up, but the loss measured as a percentage of total power will go down ...

exactly.....

[dummi]

the drivetrain will lose some constant, plus an amount that's relative to the power we're outputting

Pretty much what I said then: - a fixed loss constant plus a variable that's proportionate to the total power means the absolute loss will go up, but the loss measured as a percentage of total power will go down ...

we should all do our bit for the environment and reduce drivetrain losses with 600bhp

[rikrose]

Did everyone see the new Ariel Atom with the supercharged v8 that revs to 10k, outputting 500 BHP...

Jeffw mentioned this, but I've not seen it yet...

http://www.pistonheads.co.uk/news/defau ... ryId=17680

[quattrosteph]

Is the s2000 6 cylinders....?

[jeffw]

4-Cylinder inline