Daughter needs Gas mileage from 273 commando

one mile said

Is the Cam that ratical ? I mean ,on a street car / Driver? If you all think the Cam is too big ,I am willing to hit the wife up for the x-tra $ but budget is all but gone. Have to be SURE before spending more money and you all know what I am saying.....

Click to expand...

I don't think that the cam is that bad.


The stock 340 auto cam is 268/276 duration.

This one is just 2 more degrees duration than the exhaust on a stock 340. This will idle a little bit rougher than a stock 340 and perform well also. Crane does not even list a solid cam with this "small" of a duration. Unless he wants to switch to hydraulic and then maybe a milder cam would make more economy.

As far as economy, in one of Larry Shephard's old books, he recommended the stock 360 2 bbl cam as the best cam for fuel economy. It was 252° duration and like .425" lift. My father had a '76 Charger with a stock 360 2 bbl that would get 20 MPG on the highway (and had a 25 gallon take = 500 miles between fill-ups). We would have to take a pit stop to pee before we had to stop for gas on long trips.