Mr Maine

If I ran my small block 225 hours it would use over 2000 gallons of gas. At 4 dollars a gallon that's 8k. A little more than the best headers you could buy. Well unless I idled it for 225 hours haha

shepnic74

By them cause they're cool or cause they sound good or just to tell the wife it saves gas but as far as gas motors go have seen little to no improvement in Econ with just exhaust work. Diesels are a different story but that's a whole other can of worms

beaver 3

Any exhaust ive installed ive gotten terrible fuel miliage after. Once it sounds good i cant stay out of it lol.

mike tkach

iTrader: (3)

yes headers will save fuel!after you pay for the headers you wont have any money to buy fuel so in theory you saved fuel.

SB

iTrader: (1)

That's what I tell car customers wanting exhaust. Most all ask/talk about fuel mileage as the OP is. And it's true, They can't stop getting in it and blaapping the throttle. Fuel mileage goes down the toilet.

Sad, but I know people better than they know themselves.

But, whatever, I'm just the azzhole. LOL.

Perlmudder

I can honestly say I have never once calculated fuel economy on a boat, all I know is when I get down to a 1/4 tank it is time for more. I could not rationalize spending a few grand on headers to save fuel, for performance and looks absolutely.

Trash

I've always said looking for fuel economy in a boat is like looking for virtuosity in a whore house.

NautiSouth

Hmm... I was assuming that a number of forum members had fuel flowmeters onboard. You'd have to have that and drive under controlled conditions to note the difference in FE, I'm sure.

SB

iTrader: (1)

Fuel flow meters on a boat with sbc and headers ? Extremely doubtful .

Now, on a cabin cruiser or cruiser type that goes across open water for many miles, sure....it's all about making it to your destination and/or next gas stop.

I have a question - why are you being so painfully persistant about this ?

There are easier and better ways to gain some fuel mileage.

Another example and back back to weight - running a full tank when you don't need to is a total waste of fuel efficiency ?

We all know what gas basically weights right ?

MILD THUNDER

iTrader: (3)

Surprised nobody recommended that the OP should install merc 496 manifolds on his small block yet.