High-G FJR Junkie!
Join Date: Mar 2015
Location: Rolling Prairie, Ind
This is real simple Donk, more Cylinders equal more power pulses per crank revolution, the efficiency is Dependent on a lot of things but because you Have more rods/bearings/pistons there is more drag but because those rods/bearings/pistons tend to be smaller & lighter to meet a given displacement requirement generally it also allows a higher rev limit, I think (maybe wrong) but it seems the f1 engines turn 25k+ rpms which again equal more power pulses in a given time frame (Revolutions Per Minute) so the added drag/inefficiencies don’t really offset the added power pulses. The head/intake/exhaust designs really dictate how well the engine uses the fuel it’s given (efficiency).
In the old days most v8 engines were about 60% Efficient but today good race engines are about 80% efficient of how they use the btu’s of energy in a gallon of fuel, Just the way it is. As an aside any given engine’s peak efficiency occurs at their max torque peak, they go hand in hand.
Our fjr’s are really a pretty efficient engine which is why they make the relatively high torque numbers they do along with the pretty good fuel economies, My .02
Red 2014A, the fastest color !
Ride more,, worry less !
Last edited by passx; 01-21-2020 at 11:29 PM.