Fuel / HP curve for 454 mag
Does anyone have the graph for HP/ fuel usage
for a 1988-89 454 mag 365hp? |
No one has this?
Or does anyone know the fuel burn rate at certain RPMs? rob |
fuel burn rate would vary depending on the boat it was in. a heavier boat will require more throttle to maintain the same rpms vs. a lighter boat. same reason you get worse gas mileage towing your boat vs. driving your truck unloaded.
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Are you sure that's right?
If an engine is turning 3000rpm it needs so much fuel to turn. Why would it need more fuel to turn the same RPM. I understand you need more rpm to run a greater speed in a heavier boat. But shouldn't rpm be rpm under any load? Isn't the fuel metered to a specific amount per cylinder per crank turn? |
nope your truck runs the same rpm at 70 with a load or not but you get different mileage pulling a load vs. running empty
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an engne under load will burn a lot more fuel than an engine running under a light load at the same rpm. So the fuel curve will vary from one application to another.
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All you can say is that at WOT you will burn between 35-40 GPH per motor.
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Thanks guys, that is the info I was looking for.
I'll be installing a fuel flow meter that has a 35gph max. If WOT is 40gph, than I'll be under 35gph more than 95% of the time. Which means the damn thing should be pretty accurate. As opposed to cruising at 3200-3400rpm burning 40gph. This is what I just got from Merc. 1600rpm 3.6gph 2500rpm 7.3gph 3500rpm 13.4gph 4500rpm 24.3gph that is as high as they go. |
Also depends on the size of prop you turn and the load it creates. I get better milage and mor RPM's with my 23 pitch but the GPS says the 25 pitch is faster at a lower RPM's and uses more gas. go figure Rag's
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Just plan on spending lots of $$$ on gas this summer anyway
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