Quote:
Originally Posted by concept_cynic
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Yea, radians are in some sense dimensionless as I was saying, so when people omit that it can be confusing.
I don't want to keep adding to my giant post since people might TLDR.
Ryephile's graph has some more points than Spacewilly's and it looks a bit closer, although I think at 4500 rpm it's more like 120hp, not 125hp, and it would give the "standard" D4-S + phased cams (funny I say standard, as only one other engine has D4-S :rotf
torque curve look. It's very impressive that the torque is so high at 3000-4000, considering that the cam seems to be happiest at 5000-6000. Doing some terrible extrapolating, the 2GR has approximately 250 degree duration intake cam, this one is probably like 260-270. At 3000 rpm, that is either a TON of EGR to be dealing with or a massive, massive thermal efficiency increase over a port injected engine, considering how low volumetric efficiency is. By comparison, a Prius starts to make some good torque with its 270 degree cams at around 4000 rpm, but only manages 110Nm/1.5L=73Nm while the FA20 is making a healthy ~178Nm/2L=89Nm/L! So the FA20 is pulling 20% more power with the "same" cams and same rpm! That's incredible if you ask me. Direct injection is supposedly good for 10-15% efficiency.