Mpg-bbc vs sbc Suburban

[kwin]

No one will believe this, if I had not seen it my self I would not.
When I purchased my suburban the original owner had installed a airaid system and he claimed that it got 21 mpg when he drove 110 kmh ( about 70 mph) I thought he was nuts.
Three weeks ago I had to go to edmonton on business and I was blown away by the mileage. I filled up in edmonton and drove 4.5 hours home and the gauge still showed 5/8 of a tank. It was six days of in town driving before I had to fill it. Its a big tank but still its reasonable!
I havent done the calculations but this thing is not bad at all on fuel.

We will see what a 6.0 does to it ! lol

I suspect this is the best a small block Suburban will do, might help with the comparison or just confuse things.

Keith

[DBLSPRT68]

Originally Posted by kwin

No one will believe this, if I had not seen it my self I would not.
When I purchased my suburban the original owner had installed a airaid system and he claimed that it got 21 mpg when he drove 110 kmh ( about 70 mph) I thought he was nuts.
Three weeks ago I had to go to edmonton on business and I was blown away by the mileage. I filled up in edmonton and drove 4.5 hours home and the gauge still showed 5/8 of a tank. It was six days of in town driving before I had to fill it. Its a big tank but still its reasonable!
I havent done the calculations but this thing is not bad at all on fuel.

We will see what a 6.0 does to it ! lol

I suspect this is the best a small block Suburban will do, might help with the comparison or just confuse things.

Keith

I would think the lower rear end gears were swapped out for taller gears. A SBC V8 with 3.08 rear gears gets about 20 MPG. Also, my old 89 454 Suburban got about 10-12 MPG; doing 70 AND pulling a 5000 lb car/trailer combo!

[kwin]

Originally Posted by DBLSPRT68

I would think the lower rear end gears were swapped out for taller gears. A SBC V8 with 3.08 rear gears gets about 20 MPG. Also, my old 89 454 Suburban got about 10-12 MPG; doing 70 AND pulling a 5000 lb car/trailer combo!

That was my thought, and its sluggish off the line so a gear swap would make sense.

Keith