Gallons per hour

[tonyiiiafl]

I was wondering what the average GPH is around here. I use a TWIN SCAN and find that my 290 CPMY with thirsty 454 Carbed use (combined) 22 GPH at 2900 RPM, which gives me 14 KTS. At to 3600 RPM I am kicking a$$ at 26 KTS but am also at 52 GPH. Anyone else?

[Midnightsun]

My Volvo diesels are pretty good in comparison. Burn around 2.2 gph @ 1200 rpm @ 7-8mph and 26 GPH @ 3200 rpm @ 26-27 mph. Figures are for both engines from the Volvo EVC system.

[waybomb]

About 120 gallons an hour at 60mph cruise.
About 220 gallons an hour at 104.
Not the Carver.

The Carver, I don't even care. It's almost a joy pulling up to the gas dock. I can go weeks without even thinking about gas!
I honestly have not considered fuel burn in it.
But it's probably about 2 gallons a mile on plane at cruise.

[PJHoffnet]

Has anyone installed flow rate gauges? While doing an average per hour or mile is nice, I never spend an entire underway at anywhere near a constant speed.

I of course know how much fuel I burned between fill ups (well, to the accuracy of filling the tanks to the same level each time) but for voyage planning it's not a big help.

Being able to do a few 15-30 minute runs at a constant speed would really help set a 'standard' to use when doing long distance voyage planning when you know you'll be operating at several different speeds (no wake, 5 knots, cruise, etc)

Granted, weather conditions and other factors will play in soon - but the 'average' of the instantaneous reading on the fuel flow meters are certainly be better than a 'between fill up' average.

[tonyiiiafl]

I have a dual FloScan installed, that is how I know what I am burning.

[bud37]

Qr Bbpost About 120 gallons an hour at 60mph cruise.
About 220 gallons an hour at 104.
Not the Carver.

The Carver, I don't even care. It's almost a joy pulling up to the gas dock. I can go weeks without even thinking about gas!
I honestly have not considered fuel burn in it.
But it's probably about 2 gallons a mile on plane at cruise.

Is that 105 low lead or regular for the hot rod????.........

[waybomb]

Tuned for rec90.
Have it pulley'd for 5 -6 psi.

[bud37]

Qr Bbpost Tuned for rec90.
Have it pulley'd for 5 -6 psi.

Ok.....I was doing the math for race gas at 120 GPH.... ....

[gmwalley]

I have a Garmin chart plotter and when I bought the boat I added the garmin fuel flow sensors at the same time (also upgraded the 'flakey' level sending units with WEMA style). Plotter now keeps track of fuel level, burn rate, calculates range to empty, etc. - almost like a video game. Overall average on 370 aft cabin with twin 454XL crusaders is about 1 mpg. On plane its about .7 mpg. ... so burn rate is MUCH higher at planing speeds but so is speed. Seems most efficient is just at the edge of coming off plane. Sensors were easy to install (except pulling the NMEA cable up from engine room. Newer boats my already have it there for other stuff - my boat is a '94 model with carb engines.

[bigblockcutlass123]

Qr Bbpost I have a dual FloScan installed, that is how I know what I am burning.

Mine is linked to my GPS and tells me Miles per Gallon, Also gallons burned.