Anybody know the heat values for pump gas? race gas? etc?

I was just sitting around thinking of the differences in fuels, mainly octane ratings, but there has to be a difference in heat values as well.

?

 

19,000 to 20,800 btu from memory

would have to look up data to be certain

you might try Emailing "VP Hydrocarbons Inc"

 

Gasoline - 124,000 Btu/gallon
California gas - 111,000 Btu/gallon
Diesel - 138,000 Btu/gallon
Propane - 91,000 Btu/gallon
Methanol - ~57,000 Btu/gallon (close)
Ethanol - 76,000 Btu/gallon

 

Gasoline - 124,000 Btu/gallon

avg pump gas = approx .730 spg

.730 x 8.3 = 6.059

124,000 / 6.059 = 20,465.4 BTU/Lbs gasoline

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19,000 to 20,800 btu from memory

would have to look up data to be certain

 

Ok, and what about say 2% oxignated fuel{sp?} vrs say 9% o2 content in the same given octane?

 

You might want to check the concepts and data presented in this reference:

High Performanc Automotive Feuls & Fluids

It includes the heating values for a wide variety of fuel components, blended fuels, and even some specific branded racing fuels. It also notes the importance of looking beyond the heating value, and considering the stoichiometry of the fuel and the density of the fuel. It develops the concept of "specific energy", which is defined as heating value divided by A/F stoichiometry.

It is a little sloppy, in that it does not differentiate between the concept of "higher heating value" and "lower heating value", and does not identify the listed data as to whether it is HHV orLHV.

Ito-octane: 19,100 BTU/LB; Stoich: 15.1:1; SE: 2.9
Methanol: 8,600 BTY/LB; Stoich: 6.45:1; SE 3.08
Ethanol: 11,500 BTU/LB; Stoich: 9.0:1; SE 3.00
"Gasoline": 19,000 BTU/LB; Stoich: 14.6:1; SE 2.92

C16: 18,765 BTU/LB; Sp. Gr: .7324
C14: 19,684 BTU/LB; Sp. Gr: .6940