Mr. Sandog

The sweet spot for LSx motors is 1800-2000 RPM. More than that and you're wasting gas (inefficient), less than that and the engine has to fight to move the vehicle (not enough torque). Both waste fuel.

MikeGyver

iTrader: (5)

It's miles per gallon, not miles per gallon per hour.

1ImperialSS

iTrader: (5)

really? are you sure???...what im talkin about is pretty much relevant to why you would get worse mileage going 35 than you would going 40, because though you are going slower at a lower rpm, the amount of fuel that it would take to increae from 35 to 40mph would not outweigh the fact you are traveling a great distance. for example, you go 35mph for an hour persay and use 2.5 gallons of fuel vs going 40 for an hour and use 2.7 gallons of fuel. going 35 mph you get 14MPG but going 40 you get 14.8. i know this is all theory and i dont personally know if gas consumption rests on a linear curve (oxymoron?) but you might get the jist of my argument

gallons per hour, given the MPH will directly correlate to miles per gallon...
gallons/hour:::::gallons::::::::hour:::::::::::::::::::::: : gallons
------------ = ---------- * ------- (hours cancel) = ----------(inverted)MPG
miles/hour::::::: hour::::::::::miles::::::::::::::::::::::: miles
IMO... but i could be missing something

MikeGyver

iTrader: (5)

If your made up numbers are to show that it might be possible to get better mileage at a higher speed, you need to change your argument. Even your equation proves you wrong about MPG/H. All you're doing is converting miles traveled at a steady speed into miles by cancelling hours. I'm sure that it happens that there are speeds that produce better mileage than speeds a little lower, and I'm even more sure that all we care about is MPG, not MPG/H. The only thing that MPG/H is saying different than MPG is how far you went in an hour. So 14.8 MPG/H means that you were traveling at 14.8 mph. I think that is not the argument you are intending to make, and we are not in disagreement about mileage, we are just arguing about your lack of mathematical visualization.

1ImperialSS

iTrader: (5)

yes im talking about going a steady speed for the sake of ease and yea im talkin about one hour to use a simple number, if you drove that speed for half an hour, you would go half as far and use half as much fuel. im not arguing about either of our mathematical abilities with that last post i was just trying to prove that gallons/hour will convert into MPG if you know the MPH. look man im tired and even more tired of trying to prove my mathemtical situation. i would appreciate if you didnt slam my "mathematical visualization" im not trying to say my scenario is correct because i dont know the details of fuel consumption but dont insult me. lets just stick with this answer to the thread starters question.....sweetspot will be between 1800-2000rpm locked up in OD.