I was on Revmasters site today, and they are offering a new 2331 cc long stroke engine for less than $ 8,000. It is said to have larger fins on the heads to improve cooling and weighs 170 lbs dry. Probably has an install weight of 190 lbs, but lots of bang for the buck. It also developes it's cruise power at a lower rpm to allow longer props to be used, which is needed on the kitfox. Here are the specs:
R-2300
SPECIFICATIONS
HP Rating: 85 @ 3200
Continuous HP: 80 @ 3000
Fuel minimum octane: Aviation grade 91/98 – 100LL
Conforming to ASTM D910
Oil: multi-grade 20/50
Bore: 94mm
Stroke: 84mm 4 main bearings
Displacement: 2331cc
Firing order: 1 – 4 – 3 – 2
Compression ratio: 8:1
Spark plugs: 12 X 3/4 reach DCPR7E
Carburetion: RevFlow 36mm
Ignition: Quad CDI 8 coils
Timing: BTDC 25 degrees
Dual alternator: 20 amp each
Battery: 12V min. 20 amp
Crank flange: SAE #1 4-3/8″ bolt circle
Dry weight: 170 lbs.
OPERATING LIMITS
Max rpm: 4200
Cruise rpm: 3000 +/- 200
Idle rpm: 900 +/- 50
Oil temp min: 130 degrees F
Oil temp max: 220 degrees F (measured at sump)
Oil pressure min: 10 lbs/1000 rpm
Oil pressure max: 80 psi
CHT cruise: 350 – 375 degrees F
CHT climb: 450 degrees F
EGT full rich: 1250 degrees F
EGT max; 1400 degrees F
Enjoy
Roger