What is BSFC?

Brake Specific Fuel Consumption (BSFC), is a measure of how efficiently a given amount of fuel is converted into a certain amount of power. Simply put, it’s the rate of which fuel consumption is divided by the power produced. BSFC allows the fuel efficiency of different engines to be directly compared. To find the actual BSFC of an engine, you need to take the weight-per-gallon of the fuel, times the measured gallons per hour used, and then divide that by the measured horsepower achieved. Typically, fuel weighs around 6.0 to 6.44 pounds per gallon, but the weight of fuel can vary, simply by the changing ambient temperature. If the ambient temperature becomes cooler, fuel becomes denser, and therefore it’s weight changes.

If we burn all of the fuel and capture all of the heat delivered during any given combustion cycle, we would have extracted the maximum amount of potential power. In theory, that seems simple enough, however, the typical internal combustion engine is not usually an efficient one. It is almost impossible for an engine to reach 100-percent efficiency, and you can expect a certain percentage of energy content to be lost.

It is important for those testing BSFC to keep in mind that the results of BSFC while measured on a dyno, only show the efficiency between two values: fuel consumption and power. This doesn’t take into account other factors about the engine or vehicle.



PRICE TAG
Part Manufacturer Part Number Approx Cost
Block World 088515-4500 $5,000
Heads Stage-V S-M2000H $4,200
Crankshaft Crower 95168 $1,500
Rods Crower B93911B-8-UPG $,600
Pistons Diamond Custom $1,600
Coated Main Bearings Fed Mogul 142M1 $150
Coated Rod Bearings Calico/Clevite CB743HN $150
Cam Bearings Dura-Bond PDP-17T $50
Camshaft Comp 24-000-9 $380
Cam Drive Keith Black 63107A + $1,000
Lifters Comp 829-16 $470
Rocker Arms Stage-V IR-417N3/ER-cus $1,700
Rocker Shaft Supports Stage-V S-M2000ST $900
Rocker Shafts Dechellis Machine I45-HB/E45-HA $500
Pushrods Smith Brothers 8 NH314-CB $300
Adjuster studs and nuts Manton Stud# 823, Nut# 851 $200
Oil Pump Titan 426 drag $800
Intermediate Shaft Milodon 21525 $140
Oil Pump Internal Pickup Milodon 21330 $130
Oil Pan Milodon 31160 $375
Blower Mooneyham 10-71 $2,500
Manifold INDY 426-BM $1,250
ECU FAST 30-1004 $1,900
Harnesses FAST 30-1100/1200 $600
Injectors Lucas 621061 $880
XIM coil controller FAST 30-1311 $600
Cam Sensor MSD 2346 $80
Coils AEM 30-2853 $640
Plug Wires MSD Custom $150
Plugs Champion N59YDR $40
Main Stud Kit ARP 145-5602 $115
Rod Bolts Crower AMS5844 $400
L19 Head Studs ARP Special $590
Valve Covers Keith Black 53097FHA-1 $650
Water Pump Meziere WP337S $430
Crank Support Cradle RCD 202600-0004 $800
Total $30,270

SOURCE
Calico Coatings
6400 Denver Industrial Park Rd. P.O. Box 901
Denver
NC  28037
888-236-6079
www.calicocoatings.com
Fuel Air Spark Technology
3400 Democrat Road
Memphis
TN  38118
877-344-8355
http://www.fuelairspark.com
Comp Cams
3406 Democrat Road
Memphis
TN  38118
800-999-0853
http://www.compcams.com
Stage V Engineering
Walnut
CA
909-594-8383
www.stagev.com
Indy Cylinder Head
8621 Southeastern Ave
Indianapolis
IN  46239
317-862-3724
www.indyheads.com
Total Seal
Phoenix
AZ
800-874-2753
http://www.totalseal.com
Aeromotive
7805 Barton Street
Lenexa
KS  66214
913-647-7300
http://www.aeromotiveinc.com
ARP Fasteners
800-826-3045
http://www.arpfasteners.com
Holley Performance Products
1801 Russellville Rd.
Bowling Green
KY  42101
270-782-2900
http://www.holley.com