Mojave GPS distances?
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Mojave GPS distances?

  1. #1
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    Default Mojave GPS distances?

    Anyone know the gps distance from Cottonwood Cove to Hoover Dam? I did the run up and back last week on 22 gallons and I wanted to get a mileage figure. I cruised up at 2800 and back at 3100. That was 29 and 32 mph on my nuvi gps, but the battery died long before the trip was over.

    BTW it was a great day: the upper lake is great past Willow Beach, just look out for the rental kayaks and canoes. They seem to think they have no obligation to share the river with powerboats. They string out completely across the channel blocking the way upriver and demand that you idle past them like it was a no-wake zone.
    WARNING!! Contents may contain sarcasm and/or satire, small children and pregnant women should exercise extreme caution.

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    Senior Member STV_Keith's Avatar
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    About 42 miles one way.
    Keith-


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    Thanks, by my calculations, that's 3.8 mpg. Not bad for a BBC pushing a heavy boat! I switched from a 4 blade 20" to a 5 blade 19" and the slip dropped from 20% to 13% and I picked up a mph at cruise. It tops out at 54 at 5140 rpm with the bimini up, but we never run it over around 40 or so. The boat is a Campbell 24' shallow v-hull that gets up on plane easily, but will pound in big chop or wakes. The sweet spot is in the 30's from 2800 to 3500 where it just purrs along and where it seems to get good economy too.

    BTW I topped off all 4 tanks at I40 on my way to Mojave, then filled the two that I used back up on the way home to Havasu at the same pumps so I am pretty sure of the accuracy.
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    Senior Member Uncle Dave's Avatar
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    Im heading up next week myself.

    Staying in Laughlin and heading up one day down the next....

    Cant wait.

    Thats fantastic mileage!

    Im getting 2.4 out of my 28footer with an Ilmor 710 in it, and I thought it got pretty great mileage.



    Uncle Dave

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    Quote Originally Posted by Uncle Dave View Post
    Im heading up next week myself.

    Staying in Laughlin and heading up one day down the next....

    Cant wait.

    Thats fantastic mileage!

    Im getting 2.4 out of my 28footer with an Ilmor 710 in it, and I thought it got pretty great mileage.



    Uncle Dave
    I know, it sounds too good to be true, but those were the numbers I got. I just roll onto the throttle and it jumps onto plane even fully loaded with dogs, wife, camping gear and 96 gallons of fuel. I would guess, but have not yet checked, that at 3200 rpm the secondaries on the carb are not open. The engine is a 540 Dart built to run on 87 octane with an 850 carb from Larry Peto in Tucson. I told him I wanted a big lazy engine working at about 1/2 capacity at cruise and it looks like I got it. I really like the cruise numbers since we like to go to Powell where long range is important.

    We also installed big 4" mufflers that cost me about 250 rpm but make an amazing difference in comfort when you spend an hour or two at speed. After the addition of a windshield we are able to talk in normal voices when we are cruising instead of shouting like when we had the straight pipes.
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    Senior Member Uncle Dave's Avatar
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    Quote Originally Posted by Westfield 11 View Post
    I know, it sounds too good to be true, but those were the numbers I got. I just roll onto the throttle and it jumps onto plane even fully loaded with dogs, wife, camping gear and 96 gallons of fuel. I would guess, but have not yet checked, that at 3200 rpm the secondaries on the carb are not open. The engine is a 540 Dart built to run on 87 octane with an 850 carb from Larry Peto in Tucson. I told him I wanted a big lazy engine working at about 1/2 capacity at cruise and it looks like I got it. I really like the cruise numbers since we like to go to Powell where long range is important.

    We also installed big 4" mufflers that cost me about 250 rpm but make an amazing difference in comfort when you spend an hour or two at speed. After the addition of a windshield we are able to talk in normal voices when we are cruising instead of shouting like when we had the straight pipes.

    I love big CI big blocks the way theyll lope along.

    My 505 CI ilmor runs more rpm and I spent most of my time @ 3800 and 4200 rpm got 2.35 MPG lst week.

    Man was it hot last week like 108-115 probably contributed to a bit less mileage when compared to the ocean runs I make- the infinitely smoother ride leading to a bit higher sustained RPM.


    Never took the bimini down.

    Took an extremely leisurely run up and back down Thursday, jumping in every half hour or so, and then there was the extreme comedy at the katherines landing ramp plus the walk to the "real" parking lot - not doing that anymore Im driving to cottonwood next time.

    Its about 128 miles from Katherines landing to the hoover dam and back.
    This includes a run down to the Davis Dam which is a tiny bit further than Katherines.
    Ive got a pretty quiet rig, but no wind protection, and a bit higher rpm probably not as quiet as yoru rig, but nowhere near the roar of my old jet boat.

    One day had 20 MPH gusts, and there were 3 footers 3-4 feet apart in the widest part of the lake. I felt pretty good about the compromise I made to buy a boat biased toward ocean running vs lake running.

    Uncle Dave
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    Last edited by Uncle Dave; 08-07-2010 at 05:22 PM.

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