Does prop slip increase or decrease with speed? Top speed less than expected.
11-10-2014, 12:21 PM
#122
Hey Black, I appreciate the generosity. I found the one that I was using before, and I think it is essentially the same - 6-valve pump with big ins and outs. Now I just need to find a bigger tank pickup. Still want to run the damned thing one more time and watch the fuel pressure to make sure that is in fact my issue. While I was fooling around with it I pulled the carb and upped the jet sizes from 76/86 to 78/89.
11-10-2014, 12:23 PM
#124
Yep, but if the lines are the big restriction, it probably wouldn't matter how big of a pump I run or how many, it can only flow so much. Maybe I should just take BUP's suggestion and drop a 1/2 inch rubber line into a spare gas can with the mechanical pump.
11-10-2014, 12:25 PM
#125
I really feel like I need to run this thing on the water one more time and watch the fuel pressure. If I could get away with it I would shut the phone lines off and duck out of the office. Sunny and 68* outside my window, and I can't do anything about it! 
Oh well, could be worse - I could be unemployed and selling the boat.
Oh well, could be worse - I could be unemployed and selling the boat.
11-10-2014, 01:26 PM
#127
I'll have to rig up a bow light for my twilight cruise at 60 MPH! 
That's the other thing that sucks about summer being over - short days and long nights!
Thanks for giving my thread all this attention and good advice, guys. We'll get this thing figured out eventually. In the meantime, I have plenty of stuff to keep me busy, but I'm still all ears for good information and suggestions.
That's the other thing that sucks about summer being over - short days and long nights!Thanks for giving my thread all this attention and good advice, guys. We'll get this thing figured out eventually. In the meantime, I have plenty of stuff to keep me busy, but I'm still all ears for good information and suggestions.
11-10-2014, 04:17 PM
#129
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[QUOTE=MILD THUNDER;4211278]Found the specs on that pump after digging all over.
50GPH flow at 6psi?
[url]http://fme
That research put some light on the whole conversation...
50 gph @ 6psi is not even a theorectical minimum.. and with 3/8 line's
http://forum.grumpysperformance.com/viewtopic.php?f=55&t=1939
Assume a BSFC of 0.55 and gasoline at 6.25 lbs/gallon: BFSC Brake Specific Fuel Consumption
horse power x 0.55 = pounds of fuel burned per hour
example
600hp x .55=330lbs
330lb /6.25lbs per gallon=52.8 gallons an hour minimum fuel used.....keep in mind pumping loss thru the lines , inertial loads and heat can easily reduce actual flow rates by more than 50% so if you require 50gph your unlikely to meet demand with less than a 100-120 gph pump even with the correct line sizes[/b]
50GPH flow at 6psi?
[url]http://fme
That research put some light on the whole conversation...
50 gph @ 6psi is not even a theorectical minimum.. and with 3/8 line's
http://forum.grumpysperformance.com/viewtopic.php?f=55&t=1939
Assume a BSFC of 0.55 and gasoline at 6.25 lbs/gallon: BFSC Brake Specific Fuel Consumption
horse power x 0.55 = pounds of fuel burned per hour
example
600hp x .55=330lbs
330lb /6.25lbs per gallon=52.8 gallons an hour minimum fuel used.....keep in mind pumping loss thru the lines , inertial loads and heat can easily reduce actual flow rates by more than 50% so if you require 50gph your unlikely to meet demand with less than a 100-120 gph pump even with the correct line sizes[/b]
11-10-2014, 04:19 PM
#130
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[QUOTE=Pliant;4217176][QUOTE=MILD THUNDER;4211278]Found the specs on that pump after digging all over.
50GPH flow at 6psi?
[url]http://fme
That research put some light on the whole conversation...
50 gph @ 6psi is not even a theorectical minimum.. and with 3/8 line's
http://forum.grumpysperformance.com/viewtopic.php?f=55&t=1939
Assume a BSFC of 0.55 and gasoline at 6.25 lbs/gallon: BFSC Brake Specific Fuel Consumption
horse power x 0.55 = pounds of fuel burned per hour
example
600hp x .55=330lbs
330lb /6.25lbs per gallon=52.8 gallons an hour minimum fuel used.....keep in mind pumping loss thru the lines , inertial loads and heat can easily reduce actual flow rates by more than 50% so if you require 50gph your unlikely to meet demand with less than a 100
50GPH flow at 6psi?
[url]http://fme
That research put some light on the whole conversation...
50 gph @ 6psi is not even a theorectical minimum.. and with 3/8 line's
http://forum.grumpysperformance.com/viewtopic.php?f=55&t=1939
Assume a BSFC of 0.55 and gasoline at 6.25 lbs/gallon: BFSC Brake Specific Fuel Consumption
horse power x 0.55 = pounds of fuel burned per hour
example
600hp x .55=330lbs
330lb /6.25lbs per gallon=52.8 gallons an hour minimum fuel used.....keep in mind pumping loss thru the lines , inertial loads and heat can easily reduce actual flow rates by more than 50% so if you require 50gph your unlikely to meet demand with less than a 100
