The 225 cubic-inch Dodge slant-six engine is rearguard by the automotive enthusiast community as a virtually indestructible engine. This popular colt engine is used in many builds, but rarely gets the recognition it deserves in terms of spotlight builds, shows, and magazines – but PowerNation recently decided to change that by updating the bulletproof engine with the help of select COMP Cams parts to get the job done.
When Mopar designed the revolutionary 225 Dodge Slant Six, they gave it a 30-degree off center title to allow for a lower profile hood to be used on the car, as well as promote a lower center of gravity, and easier access to engine accessories. It was also capable of getting 30 mpg, and producing 145-horsepower during its prime. The engine a had long run from 1959 all the way to the year 2000, and during this time, Mopar made over 12 million of the G-Series engines, the engine family that includes the 255 – it was the base engine in well over 25 Mopar nameplates.
So clearly, there’s a lot of people out there with the G-Series slant-six engine under the hood, and tons more engines floating around junkyards – and catering to those who want to upgrade one just makes sense. That’s why COMP Cams offers camshafts, lifters, pushrods, and other parts to refresh or upgrade these popular engines.
A great example of this execution is when the PowerNation crew picked up a junkyard 255 for $150, and dug in to bring the engine back to life. Several parts were used to revive the engine and safe it from being scrapped.
After tearing the engine down to the block, it’s time to rebuild. The team opted to use a peppier cam grind from COMP, which is the main upgrade for the build – they employed a solid flat tappet can with 264/264 adv. duration.440/.440 lift. They also called on the cam install kit, COMP lifters, COMP pushrods, and COMP valvesprings to wake up the tired Mopar engine.
After refreshing a slew of other parts, the next episode moves on to installing the engine in a 1971 Duster to throw it on the dyno to document the impact of the build. While the car getting the engine has undergone a major restoration, and is quite the looker, what it doesn’t have is a proper engine – the one under the hood at the time of the video was sputtering and struggling to run. The result? Nearly double the horsepower for this Duster! You can see episode 1 here and episode 2 here, with reruns of the Engine Power episodes showing on The History Channel.