Big Blue24
Comp Diesel Sponsor
While I had the head removed on my daily driver for some upgrades over the winter break and holidays, I performed some in-frame piston bowl modifications. This is my true daily driver so I stayed conservative on the de-lipping in hopes of keeping the compression ratio reasonable.
A die grinder with a carbide burr was the main roughing tool and blue painter's tape was used to cover passages and openings on the motor to try to keep the aluminum shavings out of the oil system.
After some finish cuts with a dremel tool and sandpaper roll, it cleaned up ok... LOL good enough for my 300K mile motor. With 57mm diameter bowl openings, I calculated that I dropped compression from 17.5:1 down to 16.5:1.
It was tight back on cylinders 5 & 6 so I had to use a right angle air-powered die grinder.
I put the motor back together with a .010" over headgasket so the final compression ratio should be really close to 16:1. A good compromise between daily driver and performance.
A die grinder with a carbide burr was the main roughing tool and blue painter's tape was used to cover passages and openings on the motor to try to keep the aluminum shavings out of the oil system.
After some finish cuts with a dremel tool and sandpaper roll, it cleaned up ok... LOL good enough for my 300K mile motor. With 57mm diameter bowl openings, I calculated that I dropped compression from 17.5:1 down to 16.5:1.
It was tight back on cylinders 5 & 6 so I had to use a right angle air-powered die grinder.
I put the motor back together with a .010" over headgasket so the final compression ratio should be really close to 16:1. A good compromise between daily driver and performance.