Originally Posted by
scoooby slayer
the point I am trying to make is we need to look at the power/torque through the whole rpm range where we are in gear accelerating.
I bet the gundam has got over 1000 hp and over 900 lbft for the entire rev range that its accelerating in hence achieving such a massive speed, its easier to achieve a large sustained torque/power curve with more displacement.
as an example I have a plot of me and rod only 30 hp difference peak figures but torque is a lot less at high rpm, but my curve is longer and torque is sustained higher and im using less rpms.
rods plot
my plot
im not trying to making a car specific comparison in anyway ive got almost twice rods displacement, what im trying to get at is we have very similar topline hp figures, but through the entire rpm range of acceleration I have a lot more torque everywhere and my engine is almost stock on pump fuel, imagine gundam on race fuel with a fully worked head and race cams.
at max rpm about to shift ive got 620lbft, rod is down to 460 lbft now surely that has to have an impact on acceleration ?
for the last 2000 rpm im 710-620 lbft, rod is 615-460 lbft
Again, ignore torque completely, you have more power at those RPMS.
People look at peak figures and chat about them and then realise as youve pointed out that two cars of the same peak figures can have completely different characters, so then they look at the other headlie figure, torque and piss about trying to explain it with that (Diesel owners are the very worst)
People then look at dyno plots and go on and on about torque. RPM is a linear scale, torque is measured, power is your available work rate and thus ALL that matters.
So look again at your power curve against rods, yes the peak is similar, but Rod makes and exceeds 750bhp from 6500 to ~8250, while you have it from 6000 - 7250.
What Rod comes back to time and time again is that when you are at ~200mph and trying to make that final speed what matters is the gearing putting you at peak power, because if your wheel speed is fixed by the speed you're doing, more power will always deliver more torque to the driven wheels and accelerate you faster. THAT is the torque which matters, not peak engine torque.