Quote:
Originally Posted by Ecky
B18B1, Wiki states 9.2 CR, 145HP @ 5800rpm. The older B18A1 is rated 140@6300.
Peak torque is pegged at 5200rpm but the torque "curve" you get back from a dyno on this motor looks more like a flat line.
I just spent an hour and a half reading about the new SAE rating system, I wonder if Wikipedia revised these ratings or if they are under the old system?
EDIT: What sparked my interest in this was comparing Honda's latest Civic engine, the R18A1, to the B18B1 which was standard in 1994. They both have similar horsepower and torque ratings, with the R18 being a much more complicated engine (mostly to improve efficiency at part throttle). However my reading leads me to believe the horsepower number pegged on the R18 of 140@6300 is using the new SAE numbers, so that's 140 at the wheels with power steering, A/C, and drivetrain losses, while the 145 pegged on the B18 is at the crank with nothing attached. I expect the R18 is probably closer to 160hp at the crank, while the calculator spits out an expected 132 for it.
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I "fixed" the wiki - 5800 is just flat wrong. Various sources say 6300 to 6800 - i suspect 6800 is closer.
The K series engine is actually closer to the replacement for the B series. The K is about the same weight, and a LOT bigger and stronger engine. I talked at length to the Hondata guys at Bonneville - 600 plus horsepower out of a basically stock bottom end other then rods and a ton of boost.
The R series is more of a replacement for the D series. Better mileage. The exhaust manifold is truly creative. For pure mileage, pretty tough to beat an R series but I'm just a bit scared of the wiring harness - looks pretty complicated.