bass_straitener wrote:dr20t wrote:KiDo_Tuning wrote:Put it this way, on the manual one we had 880Nm of crank torque at 4000rpm based on 33% drivetrain loss or roughly 770Nm crank torque based on 25% drivetrain loss.
So you reckon 700 nm at the crank is legit?
That's what an E55 with a 5.4 litre supercharged V8 running 13.5psi puts out. Call me a sceptic.
Easy enough to calculate back from wheel power to crank power and since torque is derived from RPM and horsepower, the maths is simply physics
250Kw@wheels at 4000rpm(car made 370Kw at 7200rpm in manual form, considering a tapering torque curve, 80% more rpm results in roughly 50% more power while flat torque would give 80% more peak power)
250Kw*1.3405 = Hp@wheels so assuming 33% drivetrain loss, is roughly 502Hp@flywheel
Hp = (FtLbs*rpm) / 5252
So 502 = (FtLbs*4000) / 5252
FtLbs = (442*5252)/4000
= 660FtLbs
Convert FtLbs into Nm is * 1.3405 which is 884Nm
