Good fuel mileage combo

[cobra20]

What do you guys think would be a good drivetrain combo to get good fuel mileage out of a K5 blazer? What engine, trans, and rear end ratio?

 

[77 K20]

What do you guys think would be a good drivetrain combo to get good fuel mileage out of a K5 blazer? What engine, trans, and rear end ratio?

My dad was able to get 17-18 mpg out of his 1987 Blazer that was a custom deluxe... with basically no interior it seemed to weigh less. He has the fuel injected 305, 700R4 trans with overdrive, 3.42 gears, and little 235/75R15 tires. Air dam was still on the front bumper also.

He also drove it a lot easier than I did.

 

[350runner]

If I can get 17.5 outta my lwb, 350,700r4, 3.08s, 31s. You should be able to get that or better.

Sent from the dust in front of you!

 

[Stewzer55]

6.2 Diesel, overdrive trans and with stock sized tires, 3.42 gears.

 

[350runner]

Turbo diesel

Sent from the dust in front of you!

 

[Skweegle89]

More cubic inches means more mpg's. That's just common knowledge


Sent from my iPhone using Tapatalk

 

[350runner]

Sent from the dust in front of you!

 

[MrMarty51]

More cubic inches means more mpg's. That's just common knowledge


Sent from my iPhone using Tapatalk

AHHHhhhhh, 454 should do GREAT then.

 

[MadOgre]

6.2 Diesel, overdrive trans and with stock sized tires, 3.42 gears.

Agreed but upsize the tires. Those 6.2s got phenomenal fuel mileage and had more pep than a 305. Plus I like the way these trucks handle with the extra weight up front.

 

[Boone83K10]

If I can get 17.5 outta my lwb, 350,700r4, 3.08s, 31s. You should be able to get that or better.

Sent from the dust in front of you!

How in the hell do you get almost double of what I get with the exact same setup as me..unless you are 2wd.

 

[350runner]

2wd yes sir. Tbi heads summit headers comp cam high energy 260h, and 9.5 compression.

Sent from the dust in front of you!

 

[Boone83K10]

Ah yes all in the details...4x4, ported 882s, edelbrock 2101 intake, holley 4175 spreadbore carb

 

[350runner]

That Holley....

Sent from the dust in front of you!

 

[350runner]

Summit spread bore intake and q jet. It doubled when I took off the eddy. Summit "race" mufflers. Loud mofos

Sent from the dust in front of you!

 

[bucket]

Not to start another carb debate, but I've got respectable mileage out of Holley equipped vehicles.

But the 6.2 option and 700r4 sounds like a good one for efficiency. It wouldn't be my choice at all, but I never have mpg as a priority.