The 1947 - Present Chevrolet & GMC Truck Message Board Network

Page 3 of 3

Show 40 post(s) from this thread on one page

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)

- The 1967 - 1972 Chevrolet & GMC Pickups Message Board (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=3)

- - 400 rwhp and 20+ mpg? (https://67-72chevytrucks.com/vboard/showthread.php?t=636939)

BlackedOut67shorty

07-27-2014 05:41 PM

Re: 400 rwhp and 20+ mpg?

Quote:

Originally Posted by 68shortwide (Post 6778074)

This is what im starting with. It's rough, but i think i can make it purdy again

You would have to find a 67-68 hood to make it fit properly, or you could modify that one to work but imo the 67-68 hood would make it look real nice

68shortwide

07-27-2014 07:02 PM

Re: 400 rwhp and 20+ mpg?

Quote:

Originally Posted by BlackedOut67shorty (Post 6778256)

You would have to find a 67-68 hood to make it fit properly, or you could modify that one to work but imo the 67-68 hood would make it look real nice

Gonna go with a cowl hood anyway so I'll either let him keep it or ill sell it

67ChevyRedneck

07-27-2014 07:40 PM

Re: 400 rwhp and 20+ mpg?

Quote:

Originally Posted by 68shortwide (Post 6778074)

This is what im starting with. It's rough, but i think i can make it purdy again

Holy crap! Someone put your front end on backwards!!! :lol:

68shortwide

07-27-2014 08:42 PM

Re: 400 rwhp and 20+ mpg?

Quote:

Originally Posted by 67ChevyRedneck (Post 6778411)

Holy crap! Someone put your front end on backwards!!! :lol:

Lol, yeah the front clips sitting on the rear rails and the beds standing on end in the background.

Fitz	07-29-2014 03:07 PM

Re: 400 rwhp and 20+ mpg?

Quote:

Originally Posted by joey8383 (Post 6772534)

I would love to know how everybody achieves these high mpg's! I have owned a FEW 5.3 trucks and a 4.8 truck and always avg 13-14 mpg. Maybe 16-17 on all highway. Maybe I drive faster..
All the cummins guys claim 20+ mpg and I have had 2 24 valve 5.9's and a 6.7 cummins and even though the display shows 17mpg, on paper it always came out to 12-13 mpg.

OP, Big power+fuel efficient= LS. No doubt the LS based engines will beat the sbc in every aspect.

Nope, they aren't telling the truth or they just wish they got all of that fantastic mileage....16-17 on the highway is about right. My 2007 5.3 powered Silverado gets 16-17 all day on the freeway much less around town. Never higher. But, then, it has the aerodynamic characteristics of a small building just like every other pickemup truck..

ItsRandy

07-29-2014 09:32 PM

Re: 400 rwhp and 20+ mpg?

You can get good fuel mileage and be able to make big horsepower, you won't be able to get good fuel mileage while making big horsepower.

Small(ish) cu.in. well prepared motor + turbocharger(s) + EFI + reasonable gear ratios can get you the ability to make big horsepower and get good fuel mileage.

Acorn

07-29-2014 11:17 PM

Re: 400 rwhp and 20+ mpg?

Quote:

Holy crap! Someone put your front end on backwards!!!

Since your hood is in the rear of your vehicle, maybe you should consider an old school VW bug engine. :haha:

magwakeenercew2jh

07-30-2014 12:46 AM

Re: 400 rwhp and 20+ mpg?

1 Attachment(s)

Quote:

Originally Posted by Fitz (Post 6780709)

But, then, it has the aerodynamic characteristics of a small building just like every other pickemup truck..

I was told one time, "...It's like trying to push a brick through plastic wrap".

jmking9

07-30-2014 10:40 AM

Re: 400 rwhp and 20+ mpg?

I think this thread might be the ultimate pi**ing match:lol:. When you combine HP numbers, and MPG's into one thread, its destined to be good. But, you start throwing in who has the most beautiful wife or daughter, and it becomes legendary!

Custom 68

07-30-2014 12:41 PM

Re: 400 rwhp and 20+ mpg?

Nitrous? Turbo?
I have a 5.3 turbo 500 hp to the rear wheels with a T56, bout as close as you are going to get. I can push 18ish.
I guess I can work on the tune and maybe squeeze anther one out of it but it is tough.

All times are GMT -4. The time now is 12:30 PM.

Page 3 of 3

Show 40 post(s) from this thread on one page