SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: carlitos on May 25, 2013, 06:07:10 PM
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Too my boat to elsinore and went 3 3/4 of a lap and out of fuel I have a 454 with a bigger cam not sure it was installed by previous owner it took 28 gallons. Is my boat u sing too much gas? If is that norm, it's my first jet boat that's why I have a newb question thanks and advance for the replys
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I'm at roughly 2+ mpg Hold a milk carton/gallon upside down...that's about how quick they can use gas.
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Almost 4 laps you are doing good
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I squeezed almost 5 laps around Elsinore on 12 gallons and that was 2500-3k the whole time
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10 gallons = 2 laps @ Elsinore in my boat BBF
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I have been trying to use up old gas for a year. I have a dozen laps at 32-3500 rpm and I have only used about 1/3 of a tank. Big heavy boat with a good tight Olds too, underpowered for the job.
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For many of us...it's Gallons per Mile...... :banghead: :banghead:
At least on the river you can float down and make up for the upriver shenanigans tho! ;)
Ray
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You can't realistically figure it in MPG, you really have to figure it in GPH.
A jet hp curve should answer this question for you, figure for BTU's per HP, you are obviously running it pretty hard, your car would do the same thing if you ran it WFO up a super steep mountain.
GT
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From avi to Laughlin 30 gallons in a 450 hp 20' carrera
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Mines going to be like 2 gal per mile with these 750s
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From avi to Laughlin 30 gallons in a 450 hp 20' carrera
WOW, one way is ~15 miles, 1/2 mi per gallon?
My heavy azz daycruiser @ 2-2.5 mpg
'lil bowrider sbc, ~5 mpg
both calc'd using river miles
Dan'l
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MPG? :screwy:
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WOW, one way is ~15 miles, 1/2 mi per gallon?
My heavy azz daycruiser @ 2-2.5 mpg
'lil bowrider sbc, ~5 mpg
both calc'd using river miles
Dan'l
I was running it pretty good
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I ran one hard loop around Elsinore then two just cruising. Also poked around the cove and idled up the west side of the lake looking at camping areas and launches. Used 10 gallons.
I would have burned all 20 gallons if I kept me foot in it for three loops.
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It will be interesting to see how much more gas I burn after the new carb goes on. Because now I can probably go 6+ laps mixed rpm's. Done it multiple times and have had from 1/8 to 1/4 tank left of what I believe to be 40 gals.
But going from a 650cfm single to 800cfm double.
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Double post...
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Big bend (South of Laughlin) to pirate's, up to the dam, pull the tube a little, thrill some wake board people and head back to launch... 27-30 gallons well worth it out of 40 gallon capacity.
Wasn't always that good. I had an electric fuel pump that was over feeding my carb all the time. I used to have to cruise to Pirates and top off just to not worry about getting back to the trailer.
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I ran down to steamboat in Havasu this saturday and I believe its about 8 to 10 miles away from the Havasu marina and I only used about 5 gallons of gas. And was running at about 3-3500rpms.
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460 BBF in a somewhat heavy Hallett jet and I'm at about 2 mpg. I've made the mistake of not filling the tanks all the way and that made for a long float at the end of day a once, just glad we were up river!
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its pretty much like this:
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.maxello.com%2Fpics_ta%2Ffire_wallet.jpg&hash=bedaf68bcdb94cd02bae5f1bf103c2f4495cc347)
if you're worried about mpg you should find a different hobby.
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4 MPG, more or less.
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its pretty much like this:
(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fwww.maxello.com%2Fpics_ta%2Ffire_wallet.jpg&hash=bedaf68bcdb94cd02bae5f1bf103c2f4495cc347)
if you're worried about mpg you should find a different hobby.
Well put!!!
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Jack Smith to the sand bar and back. Will have a bit left for 2 hot laps up to the bridge n back while the wife gets the trailer. BBF with n 850 holley
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Went topock marina to lazy Harry's saturday and my 21 team Hawaiian with a 454 used 30 gallons my old challenger with a 460 ford had less than 1/4 tank in each 11 gallon tank at lazy and need 10 gallons from avi to get back!
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Fordfan, what size carb are you running? Thanks
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Fordfan, what size carb are you running? Thanks
The 76 challenger is running a 750 Holley
The 21 has a 650 edelbrock
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Ment 600 not 650
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Cool, thank you!
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About 8 cruising, 5 if I'm running it hard....and that's with 3 carbs!
: ducks and hides :
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Now I'm jealous, my weed wacker only has one carb. But I'll get 4 days out of it before I need to fill up that half gallon tank
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The guy that had my boat before me put two 35 gallon tanks in it. I just fill up each time I pull it out of the water and never worry about fuel.
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Get a bayliner 4 cyander no issues with MPG jet boat new toy that all I have to say. I'm not trying to be mean but looking for more MPH is insane on on a jet boat. One thing it's not a car good luck.
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Somehow, Jet boats and GPH don't go together. Never calculated it cause I did not want to get sick.
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Somehow, Jet boats and GPH don't go together. Never calculated it cause I did not want to get sick.
X2 lmao all I know is I have 2 20 gallon tanks and depending on where I'm at it last Saturday and 1/2 a day Sunday with usually a 1/4 or so left in ea.
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Keeping the boat on a nice plane I can go around Elsinore 4 laps (Approx 8 miles a lap) on 10-11 gallons of gas. If my right foot is heavy, can blow through a full tank in about 2-3 laps.
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MPG jet boats is terrible. I get about 1 mpg. (that's one mpg)
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