[PUP] BSFC (wasKrogen 55 Expedition vs Dashew FPB64)

[Truelove39 at aol.com]

Hi  Mike - 
 
I  think we need to compare similar horsepower engines for this discussion,  
and I think 0.275 is pretty optimistic for 400HP. What engine is achieving 
that  figure? 
 
Within  a reasonable range of HP,  4-stroke engines will have approximately 
the  same BSFC at the same rating, i.e. at max torque, where BSFC is lowest, 
and at  max HP, where it is typically 0.05 lb/hp/hr higher. Same is true for 
2-stroke  Diesels, which will burn about another 0.04 more than a 4-stroke.
 
Of  course MMMV!
 
Regards,
 
John
"Seahorse"
 

> Smaller engines generally use more fuel per pound of horsepower  per hour.
The 60 hp Isuzu 4JB1 uses about .350 pounds per hour per  horsepower.
A 400 hp engine is more likely to be about .275.

This  detail is one factor which can not be  ignored.





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