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Not sure what everyone is saying, but that looks right. IS 250 is 200hp at the crank, drivetrain loss of 30 hp isn't that bad (albiet slightly, very slightly high). My IS 350 has roughly the same drivetrain loss when it was dynoed at ~270hp.
Not sure what everyone is saying, but that looks right. IS 250 is 200hp at the crank, drivetrain loss of 30 hp isn't that bad (albiet slightly, very slightly high). My IS 350 has roughly the same drivetrain loss when it was dynoed at ~270hp.
30 hp on a 306-hp car is a lot less than 30 hp on a 204-hp car. The former is ~10%, and the latter is ~15%. Although, actually I think yours sounds abnormally high, and the OP's sounds pretty normal. I thought 15% drivetrain losses is pretty standard.
Also, the other reason these numbers may seem low is that he had modified his car with a few pieces that should have added some power. Then again, I just realized it looks like you did the same... and you're probably also rounding the actual hp number up to 270, no? With your mods, you're probably up to like 320 bhp, and your actual dyno'd whp I'm guessing was like 267 or something? In that case, your numbers make plenty of sense.
IS250 dyno results
