[mgault]

In a 70 302, is it any better on gas mileage to putt down the highway at mid rpms or do I run high rpms and get the same gas mileage?

 

[Chief yelling alot]

I keep mine as low as I can without being dum about it


in the city I cruse about 35mph @ 1100 RPM

IH 304 4 speed

 

[NE-RokToy]

Whats that newbie forum I've heard about? Or is that just a rumor?



Lowest RPM that your not lugging the motor down and loading it up.

 

[CheapXJ]

gas mileage is a function of manifold vacuum.

RPM doesn't really matter worth a shit, if you really care about mileage, install a vacuum gauge and drive to keep it as high as possible (more vacuum)

before I cut the fawk out of my XJ and still drove it on the road, I was able to get damn near 30mpg highway w/ a 4.0L by driving according to the vacuum gauge

 

[mgault]

will any of these car shops install this? is it common, or will I have to install it myself?

 

[Old Scout]

Fawkin :rainbow: thread!

 

[Keith]

Fawkin :rainbow: thread!

Thank you!

 

[1972CJ5+1]

I've always found my best gas milage to be at the RPM where my motor gets its peak torque. Get the specs on your cam, or if it is a factory setup, the original motor info and go from there. I was able to get about 22MPG out of a mildly built 304 in an early CJ5 this way. Planned the gearing on my CJ6 project close to the same for this reason. Added a 4:1 kit for the trail.

 

[45acp]

you need a Tornado. i put one on my bronc and with 4:56's and 35's turning 3800rpms on interstate i went from 7.3mpg to 16-17mpg. they really do work.

 

[Victor]

You are the first person I have seen post that tornados work. I've seen a few people complain that they did nothing. Now I'm curious

 

[45acp]

my apologies. this started out in General.

i now realize my post was only lightly misted with sarcasm, and not dripping with it. in the future, i will turn the sarcasm nozzle from "spray" to "stream".

they dont work.