The crank started its life as a 426W crank in 1965. Car Craft, Hot Rod, Mopar Muscle, and Popular Hot Rodding have all featured 318 build ups in their pages. According to Sephton, while the camshaft works great, it lets others know the engine is modified but not to the point where it is incompatible with power equipment. Parts availability is almost as good as the small-block Chevy, if a little more expensive. I also had the shop do a 3 angle valve job and bowl blend. Once you send it off to Bullet, they will contact you via email. However, boost is not necessary to achieve dyno-twisting numbers.
Fel-Pro gaskets are used to seal up the block-to-cylinder-head joint. Used and abused, sold it with over 200k on the clock and I still see it running around town. I started a cheap 5. The Rattler line is designed as a retro-fit bumpstick for classic engines. While we would love to put the motor on a dyno, the closest engine dyno is a couple hours away and magazine deadlines are rarely forgiving.
The Mopar 360 can make an excellent performance engine. I hope this helps others understand that you can build a very powerful stroked 408 without the need for very expensive aluminum heads and other high dollar parts. The adjustable throttle linkage comes from Mancini racing. Even the early high-performance 440 Magnum engines, rated at 10:1 compression, actually fell short of that specification. I would some day like to try again on a Magnum 5. The only exception is some dampeners can be bolted on and not balanced as long as they are internally balanced to start with.
I had the block bored and honed to a final bore size of 4. It has two excellent articles on the 318. Cam card and head flow numbers attached This car weighs 3290 with me in it, all steel. In fact, there was so much meat that the machine shop offset ground the rod journals to a final stroke of 3. The kind that makes driving fun and effortless. Standard rockers and pushrods, stock crank, +. The budget-minded big-block cranked out 551 horsepower on 87 octane fuel with peak torque coming in at 586 lb-ft.
Greg, or GregZ as he is known on the Moparts. This is a great lens. It's also the easiest to find. I've been googling and youtubeing everything you wrote about. Reliable 87-octane, big horsepower has been the Holy Grail for both enthusiasts and engine builders for some time now, with many choosing forced-induction to achieve that goal. Pistons are flat tops with valve reliefs and were set at 0. With the long-block complete, Hardcore turned its attention to finishing off the induction system.
Not much work was needed on the 18-degree Edelbrock Performer cylinder heads, other than hand-blending the intake side. I also replaced the stock oil pan with a Milodon pan and matching pickup, and bought a nice set of polished aluminum valve covers. The car in question runs a six pack with a 727 tranny and 4. The beauty of this engine package is that it makes these numbers below 6000 rpm. Instead, use an Edebrock Performer or Weiand Action Plus which are sized correctly for the 318 intake ports.
At the lowest recorded rpm point the engine was well over 500 lb-ft, reading 527 lb-ft at just 3,600 rpm. Machine work included boring and honing with torque plates very important , line honing the main bearing saddles, and decking the block. The 3310 750cfm carburetor was slight reworked and outfitted with 72 front jets and a 3. The rotating assembly is internally balanced Skat set up with a cast crank, forged I beam rods and forged Icon Flat top pistons. I recently had a 318 rebuilt to replace the 273 in my 66 Barracuda. I can't wait to get my Barracuda back and see how this thing actually runs. Cast pistons were for Grandma cars and forged pistons were for everything else.
So, on your overdrive transmission. Finally, we had the valvetrain to contemplate. Almost 12% smaller than the 360, the 318 should get about 12% better mileage, all else being equal. With the help of shop manager, Steve Brule, and his crew, Viau and Gough tested 750 cfm and 950 cfm carbs. No matter what the year of the block, they were all just as thick as the others.
Just how much difference do the aluminum heads with the better compression chambers make? There is a ton of good information in this book. Forty five extra cubic inches equals lots more torque and horsepower, and the 318 is a bolt-in replacement for the 273. It can easily make 400 plus horsepower and still has great street manners. By the time you do all that it's almost as cheap to go with a set of aftermarket connecting rods. On the bottom end, the oiling system uses a oil pickup and Milling oil pump set for 50psi oil pressure at 2500rpm.