Originally Posted by northstar23 
That got me thinking ...and I'm thinking not
I'm thinking its a good way to screw up a perfectly good cylinder head. Can't see how that would help except increase combustion chamber volume and decrease compression. Yes, sharp edges are possible hot spots and can promote pre-ignition. Not sure that a notch in the cylinder head will prevent detonation, (caused by the fuels ability to resist deto).
I always hear these statements - "they swear it makes a difference."
I heard a guy say he put a coffee can muffler on his Honda Civic and he "swears it made a difference" too....LOL...I'll bet he swears it "feels" like he has more power with his 23 extra decibles.....
Seriously though, not knocking your buddies, but the only thing that convinces me are dyno sheets, combustion chamber burn patterns, and piston wash and plug readings. Factual info is needed before I begin cutting notches in my motors.
