Quote:
Originally Posted by Dimman
I think I saw in a Toyota service post that the cams were 255° (so 200-210ish at .050"?). Can you share valve size, my estimate is 34.5mm. So I'm putting my lift estimate at ~9mm.
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Is 200-210ish at 0.050" the typical figure for "255" cams? I wonder because the Prius is equipped with "270*" cams which seem to blow about 1/4-1/3 of the mix back out, maybe a bit less. So it should have 225 degrees "effective" duration minimum, and I guess 210+15 (or 270-45) =225, but intake acoustics mean you'd expect a little more than that. Additionally, the 2GR has ~250 degree cams which is oddly close to 255 considering that the FA20 makes peak torque at a 25% higher engine speed or so.
Excuse my rambling, we can get back to headers now.