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575 range....?

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Old 02-04-2007, 03:09 PM
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Default 575 range....?

What kind of range(miles) can one expect on a 8,000lb to 10,000lb 35'er with twin stock 575's.......I am talking 3,000 to 4,000 rpm....not wfo..........
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Old 02-04-2007, 03:20 PM
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Default Re: 575 range....?

Err.............how much fuel onboard?
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Old 02-04-2007, 03:21 PM
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Default Re: 575 range....?

sorry forgot to put that in there......200 gals
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Old 02-04-2007, 03:39 PM
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Default Re: 575 range....?

logged mileage on a trip with cig bullet an 31 scarab excell took into acount spped blasts harbor idles and cruising both had 454 365 hp Trip recap
Miles travelled Escape Klaws-579.9 Fuel 484 MPG 1.198
Miles travelled Hydrotherapy-491.8 Fuel 359 MPG 1.37
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Old 02-05-2007, 05:48 AM
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Default Re: 575 range....?

ttt ......Anyone else with numbers like Klaw but for a boat with stock Merc 575's ??
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Old 02-05-2007, 03:16 PM
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Default Re: 575 range....?

I can run our tank empty in one average poker run here in the Thousand islands. 36 apache with 575SCi's. Are you lookinf for exact numbers?? They are a very thirsty engine!!

Oh, we have about the same size tank too.
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Old 02-05-2007, 05:16 PM
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Default Re: 575 range....?

Thanks Jeff............I would guess that your poker runs are around 75 miles like the three events NPBA holds here each year.......and at WOT I figured I would burn it up that fast. Do you get better range when not running as hard as you would in a poker run? I am asking because I know the 575's have to run on at least 91 and sometimes the 91 is hard to come by.....
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Old 02-05-2007, 05:23 PM
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Default Re: 575 range....?

Get in touch with BillR here on the board. He has same setup in a 38 TS/TG, and can probably shed some info.

With a pair of 496HOs, I get about 2mpg with an aggressive cruise.
With 525EFIs, I'd venture a guess at 1.5mpg.
With 575SCis, I'd venture a guess at 1 mpg.
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Old 02-05-2007, 07:54 PM
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Default Re: 575 range....?

I had 500 EFI's with 8 psi Prochargers.....was getting about 0.8 mpg! in a 38 Formula at cruise speeds.
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Old 02-05-2007, 08:07 PM
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Default Re: 575 range....?

The 575's are thursty. Every test report I have seen on these motors puts thEm at around 90 to 95 GPH at WOT. I run a 2001 PQ with the stock 575's and at moderate rpm's , 3000 to 4000, it burns close to 1 gallon per min. But is is worth every $$$$$$$
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