Mercury Racing 600 SCI Fuel Consumption
05-11-2012, 06:44 AM
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Mercury Racing 600 SCI Fuel Consumption
Hi,
Can you help me out on this, I have a pair of Mercury Racing 600 SCI's producing 750BHP each what fuel consumption should I expect to get at full revs of say 6,000 rpm, The boat is a deep "V" and weighs in at 6000Kg
thanks
Martin
Can you help me out on this, I have a pair of Mercury Racing 600 SCI's producing 750BHP each what fuel consumption should I expect to get at full revs of say 6,000 rpm, The boat is a deep "V" and weighs in at 6000Kg
thanks
Martin
05-11-2012, 11:18 AM
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Pash1:
The only way to know your exact mileage (fuel consumption)at that horsepower level(much higher than stock 600sci) and that rpm is to hopefully have the engine dyno test sheets and hopefully the BSFC (brake specific fuel consumption in lbs./hour) on those dyno tests and calculate your mileage.
You can assume that raising the horsepower by 15% or so you have and taking the top rpms up by over 500 rpms you will be greatly increasing the fuel consumption per hour versus a stock 600sci engine.
This does not appear to be a project where fuel mileage was the primary concern?
Best Regards,
Ray @ Raylar
The only way to know your exact mileage (fuel consumption)at that horsepower level(much higher than stock 600sci) and that rpm is to hopefully have the engine dyno test sheets and hopefully the BSFC (brake specific fuel consumption in lbs./hour) on those dyno tests and calculate your mileage.
You can assume that raising the horsepower by 15% or so you have and taking the top rpms up by over 500 rpms you will be greatly increasing the fuel consumption per hour versus a stock 600sci engine.
This does not appear to be a project where fuel mileage was the primary concern?
Best Regards,
Ray @ Raylar
05-11-2012, 03:58 PM
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I always calculate gal/hr myself not miles per gallon.My friend has a 1998 35 Fountain with steps, twin 600's [ with blowershop blowers, 4 carbs] using roughly 50gal/hr ea engine at WOT.
The 6.2 MX MPI's in my 25'7 boat register 25gal/hr ea @ 5150 WOT on the Smart Craft flowmeter.
The 6.2 MX MPI's in my 25'7 boat register 25gal/hr ea @ 5150 WOT on the Smart Craft flowmeter.
Last edited by spectras only; 05-11-2012 at 04:01 PM.
05-11-2012, 04:10 PM
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Pash1:
The only way to know your exact mileage (fuel consumption)at that horsepower level(much higher than stock 600sci) and that rpm is to hopefully have the engine dyno test sheets and hopefully the BSFC (brake specific fuel consumption in lbs./hour) on those dyno tests and calculate your mileage.
You can assume that raising the horsepower by 15% or so you have and taking the top rpms up by over 500 rpms you will be greatly increasing the fuel consumption per hour versus a stock 600sci engine.
This does not appear to be a project where fuel mileage was the primary concern?
Best Regards,
Ray @ Raylar
The only way to know your exact mileage (fuel consumption)at that horsepower level(much higher than stock 600sci) and that rpm is to hopefully have the engine dyno test sheets and hopefully the BSFC (brake specific fuel consumption in lbs./hour) on those dyno tests and calculate your mileage.
You can assume that raising the horsepower by 15% or so you have and taking the top rpms up by over 500 rpms you will be greatly increasing the fuel consumption per hour versus a stock 600sci engine.
This does not appear to be a project where fuel mileage was the primary concern?
Best Regards,
Ray @ Raylar
Thanks Raylar for your information, I bought the engines with 6 Hrs on them and was told that they dyno'd @750 BHP with a stage 2 Wipple, I guessed that it would top out @ 6000RPM as that is the rev limited fitted, Just wanted a rough idea of the fuel consumption as hopefully going out testing before a race here in the UK. I have 300 UK Gallons on board - No fuel gauges, I was reckoning on about 150 UK Gal per hr or in your terms at our Gas prices $2,350 per Hr
05-11-2012, 06:02 PM
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Thanks Raylar for your information, I bought the engines with 6 Hrs on them and was told that they dyno'd @750 BHP with a stage 2 Wipple, I guessed that it would top out @ 6000RPM as that is the rev limited fitted, Just wanted a rough idea of the fuel consumption as hopefully going out testing before a race here in the UK. I have 300 UK Gallons on board - No fuel gauges, I was reckoning on about 150 UK Gal per hr or in your terms at our Gas prices $2,350 per Hr
if you are, the cost of fuel will be meaningless compared to the cost of rebuilds
05-11-2012, 11:16 PM
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05-12-2012, 12:44 PM
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Martin:
Most of the racing venues and pictures I have seen from the UK the sea conditions will not allow a boat to run a 6000rpms for many long periods., but that being said, my guess would be at that 6000 rpm and horsepower number with that Whipple stage 2 upgrades I would guess those engines are gonna use at least 60-80 gallons per hour EACH! maybe more. You might Email Dustin @ Whipple or PM him here on OSO and see if he has data from his dyno tests on these engines with that he can give you exact figures for the fuel use at that rpm and horsepower level. He is very exacting and thorough with his testing and measurements. I think he might be a great resource here.
Best Regards,
Ray @ Raylar
Most of the racing venues and pictures I have seen from the UK the sea conditions will not allow a boat to run a 6000rpms for many long periods., but that being said, my guess would be at that 6000 rpm and horsepower number with that Whipple stage 2 upgrades I would guess those engines are gonna use at least 60-80 gallons per hour EACH! maybe more. You might Email Dustin @ Whipple or PM him here on OSO and see if he has data from his dyno tests on these engines with that he can give you exact figures for the fuel use at that rpm and horsepower level. He is very exacting and thorough with his testing and measurements. I think he might be a great resource here.
Best Regards,
Ray @ Raylar
05-12-2012, 04:40 PM
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Martin:
Most of the racing venues and pictures I have seen from the UK the sea conditions will not allow a boat to run a 6000rpms for many long periods., but that being said, my guess would be at that 6000 rpm and horsepower number with that Whipple stage 2 upgrades I would guess those engines are gonna use at least 60-80 gallons per hour EACH! maybe more. You might Email Dustin @ Whipple or PM him here on OSO and see if he has data from his dyno tests on these engines with that he can give you exact figures for the fuel use at that rpm and horsepower level. He is very exacting and thorough with his testing and measurements. I think he might be a great resource here.
Best Regards,
Ray @ Raylar
Most of the racing venues and pictures I have seen from the UK the sea conditions will not allow a boat to run a 6000rpms for many long periods., but that being said, my guess would be at that 6000 rpm and horsepower number with that Whipple stage 2 upgrades I would guess those engines are gonna use at least 60-80 gallons per hour EACH! maybe more. You might Email Dustin @ Whipple or PM him here on OSO and see if he has data from his dyno tests on these engines with that he can give you exact figures for the fuel use at that rpm and horsepower level. He is very exacting and thorough with his testing and measurements. I think he might be a great resource here.
Best Regards,
Ray @ Raylar
Best advice over here was 0.1 UK Gals per BHP Per Hour so we are in the right field....
Martin
