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Discussion in 'General Supra Topics' started by BrettS, May 21, 2019.
What is? Ideally it should have been dyno'd in 6th gear (1:1).
The dyno results not intersecting at 5250. The large delta between the torque (+100) and HP probably gives a different axis.
Yeah... That's not at all how that works. HP and TQ always intersect at 5252; perhaps you should look up the formula. In WinPEP you can adjust the axes however you see fit to compare the curves; the standard is to have both on the same scale, though (which means they'll cross at 5252, per the math).
No, it isnt always how it works, especially when there are large delta between measured HP and torque if forced scaling isnt used.
Mathematically HP=TQ at 5252RPM. The nuances of the WinPEP software and whether you force scaling or not, does not change the calculation.
I'm not challenging the math, I'm very familiar with dynos. The fact is, your graph wont intersect all the time; doesn't change your HP or torque. It's just a display issue.
So, can anyone interpolate what the crankshaft HP and torque should be, based on the C & D dyno test?
14% drivetrain loss is prevalent for newer vehicles.
Thanks. Does that apply to torque too? Someone said this is for HP only, torque actually works differently.
Torque is a product of gear ratios, diff ratios, wheel diameter, and in this case, torque multiplication through the converter.
Yeah, so what does the difference between Toyotas claimed 365 lb ft, and the dynos 427, mean? If the crankshaft HP is between 390-400, what would the torque be based on Toyotas claimed, and the dyno reading?
Tried to fix it as much as possible..
cleaned up image:
Remember when this guy was crapping all over the Supra? He seems to have a different tune lately.
>330whp is what most were expecting, as this has been almost universal with turbo BMW powerplants.
But the big news is this engine is a torque monster! We just have the HP scale on the screenthot, but making some approximations, it`s churning around 250lb-ft at 1500rpms, and 400 at 2000rpms. That`s insane.
The other side of the coin is that power is peaking very early (around 4800rpms).
Both characteristics are largely determined by two factors: A small twin scroll turbo and the integrated head/manifold with very short runners. This is probably good news for the aftermarket: there is some big power to be made with a larger snail. For a street car though, the engine in stock form seems pretty damn sweet.
I'd imagine it to look a lot like this one (also lacking the particulate filter).