Screw the 318! I'm going 273!!! Pistons questions.....

dodge freak said
Why don't you just do a cam swap??

A 273/318/360 isn't going to idle any better without getting the right cam. Your just wasting time and money changing the 360. Oh sure, the 273 MIGHT--and its a maybe--get 1 to 3 mpg better--built the same.

Get her a Comp HE 252 and a 600---maybe even 500 cfm Edelbrock carb to top it off. Make sure the intake has a perfect seal--get rid of those leaky headers if it has them, get cast manifolds and she be tinkle pink happy...and it cost less and be done quicker.

Good thoughts there.

Rob R said
if it were me...I'd build the 318...it'll always make 45 hp and 45 ft lbs more than a comparable 273.

The 318 idea I like better and probably won't cost anything but a few peanuts in milage.

StrokerScamp said
My stock bore and stroke 360 got 21 MPG in my 71 dart......when the fours were closed. I didn't build it for mileage. I just built it. I used a thermoquad because I know how to tune them and I knew it would haul ***. I just lucked out that it got the mileage it did. Whenever I build one, I don't worry about mileage. I just build it for what's intended. Worryin about mileage will only result in costing you power you could have had otherwise. Like I said. Go buy a frikkin toyota if mileage is a big deal.

And you probably had on a very modest and mild build an easy 250 - 300+ HP.
I had a all stock 360 minus the 635 Carter and dual exhaust off the manifolds with twin cats getting a constant 19 - 20 in my old Dodge Magnum (Cordoba based car for those who don't know) A MSD fired the junk yard distributor w/vacuum advance replacing the lean burn. The rear had 2.76 gears rolling on 235/60/15's. The Magnum was listed at 3700 lbs and then I get into it (180lbs.) and of course, gas will weigh in. 4000 lbs. and it wold move nicely.