View Full Version : 318 experience

05-22-2007, 07:46 AM
looking at getting a bush truck, and my friends dad has a 83 150 with the ol 318.

Hows the 318 for power?
Has it got potential?
Whats the limiting factor?
Will 360 heads swap onto a 318?
I've heard they are pretty stout, any experience?


05-22-2007, 11:19 AM
i like my 318 its never left me stranded. they could use a bit more bottom end but i find them to be a very sturdy motor can take a lickin and keep on tickin lol.i currently have a 89 W150 6inch suspention 4 inch body 318 727 and 241 on little 33's but have pushed 38's with no problems.

05-22-2007, 11:39 AM
I like those old wide block 318's, they had some power. I've owned a couple newer 318's EFI ones, they suck gas like crazy and very crappy power. Pretty dependable motor tho, been around a long time and I am pretty sure the 360 heads will fit on it. If it's carburated I'd prefer it over EFI even with the downside of carb'd motors for 4x4'in. [cheers] ......but then I dunno anything. :D

05-22-2007, 12:49 PM
360and 340 heads will bolt on!!!

05-22-2007, 03:15 PM
Ive owned a few 318's and 360's, 318 is one hellava motor. Good on gas, and lotsa power.

Ive also done a lot of reading on the 360 headswap onto a 318. They will bolt right on, however, the ports are slightly shifted so its best to use a 360 intake to match them up. As well the 360 heads have a much larger chamber, so by bolting them on you drop your compression signifigantly. So shave them, or take the 360's valves and have the 318 heads machined to fit them for best performance.

05-22-2007, 07:05 PM
good stuff, i wonder what kinda cam they can take to make up for the bottom end grunt.

05-23-2007, 08:45 AM
Ive had a couple of 318 in cars they were reliable ,the only time one left me stranded was the ballast resistor packed it in, and let me on the side on the road for a few hours until my buddy brought me another one.
I did a few mods to mine like lose the stock 2 bbl carb and intake as the crossover plugs with carbon and is a pain ithe ass to clean out ,hence a nice aluminium ad 650 edelbrock ,followed by a set of 360 heads and a purple shaft cam and headers,went decent.I was given a book 'How to hop up your small block Mopar' it had lots of good stuff like what parts to look for as there was Police Intecepter motor, I scored one thru Mopars Unltd car club swap&shop. I did a rebuild and holy hen shit thing had way more snot,then my other engine ,I had also better economy!

05-23-2007, 09:58 AM
im new to motors, whats a purple cam? ive heard em before, is it a mopar brand? I'm likign what im hearing, and what is the ballast resister? Thanks

05-26-2007, 12:07 PM
A Purple shaft cam is mopar slang ofr a nice lumpy cam about 533 lift/ duration with a about 108* overlap best ran at 107* centerline.It is also a solid tappet cam.
The ballast resistor used with the Mopar electronic distributor & Orange Box igniton is 0.25 Ohms..(another tip )
the 0.25 Ohms runs a hotter system especially to the coil.Get a high saturation coil like MSD or from mother mopar . Pick up a mopar speed secrets book or a mopar performance catalog.Never leav the drive way with out a spare or 2 in the glovey.When you will go to start it will saound like it wants to fire but no spark.@ mins work with a 7/16ths wrench and it is done. I ran with 2 under the hood so if one packed it in just pull the wires off the dead one and use other one the stop by parts store next day .


05-27-2007, 10:21 AM
the 318 will never leave you stranded out in the bush they keep on going, but are a little on the low side for power but will keep those big tires moving.

06-07-2007, 11:39 PM
the 318 block hasnt changed in over 40 years. Chrysler did a good thing with the 318, and they still make em.

I'm buying another one (possibly tomorrow) the engine was converted to propane shortly after it was purchased, so the engine will be almost like new. The only down side, is the truck isn't a 4x4, but it has a 200L propane tank...

My first 318, was attached to a 1976 Dodge Royal Sportsman Ext. Van. "The Great Blue Whale" I drove that thing for 5 years, I rolled the 5 digit odo twice in 5 years, and I circumnavigated North America once. In January of 1996 when I blew out cylinder #7 I still drove it on 7 cylinders until August when something else busted in the engine and it seized.