Quote:
Originally Posted by Daox
Do you have a torque/hp graph for both engines? That would help show what kind of loads you'll be at cruising.
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Yep.
K24Z7 is ~170ft-lbs torque peak, ~205HP on paper, redline is 7000rpm.
K20Z3 is 139ft-lbs torque peak, ~197HP on paper, redline is 8000rpm.
Sample K24Z7:
Similar K24A2:
Sample K20Z3:
Similar K20A2:
Both motors have basically flat torque curves. The smaller motor would have a slightly shorter top gear (I doubt I'd bother switching that). With the Insight's stock tire size:
Stock engine - 1705rpm @ 50mph, 66 ft-lbs of torque and it cruises at approximately 50% load. So let's say it takes very roughly ~35 ft-lbs to cruise at 50.
K20 - 1680rpm @ 50mph, ~120ft-lbs torque, around 25-33% load
K24 - 1647rpm @ 50mph, ~140ft-lbs torque, around 24-28% load
Taller gearing, longer stroke, but lower load...