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Fuel Calculator

Formulas used by the calculator are taken from the Aeromotive Technical Bulletin #501
Use the following information as a guide. The actual BSFC can be determined through flywheel dyno testing.
Naturally aspirated engines are normally most efficient with a BSFC between .4 and .5 lbs/hp/hr.
Nitrous combinations use a little extra fuel and often develop a BSFC from .5 to .6 lbs/hp/hr.
Forced induction engines are usually least efficient and BSFC ranges from .6 to .75 lbs/hp/hr.
HP BSFC lbs/hr USG/hr L/hr L/min Surge Tank L Surge Seconds

The formulas used in the following air filter calculators are based on the information in the K&N Filter Facts page.

A K&N filter minder can be used to monitor the filter restriction.

K&N Air Filter Area Requirements Calculator

CID Max RPM Area in2 Area cm2

K&N Round Air Filter Area Performance Calculator

K&N recommend the height of the filter is between 1/5 and 1/4 of the diameter.

Dia in Height in Seal in Height Range Area cm2 Area in2 CID Max RPM

K&N Panel Air Filter Area Performance Calculator

Measure the filter area excluding the seals.

Length mm Width mm Area cm2 Area in2 CID Max RPM

K&N Cone Air Filter Area Performance Calculator. (RR-3001)

Base Dia mm Top Dia mm Height mm Area cm2 Area in2 CID Max RPM

K&N Oval Tapered  Air Filter Area Performance Calculator. (RF-1034)

Measure the circumference of the top and base of the filter then measure the height of the filter excluding the end caps.

Top Circ mm Base Circ mm Height mm Area cm2 Area in2 CID Max RPM

 

 

 

 

 

 

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