Challenger Drag Pak Owners

art leong · 02-24-2010, 07:29 PM

I understood that the way they interpret the rules today. If the valve makes a notch in the piston, it would not be allowed.
Years ago with the hemi car we would put a worn out set of valve springs on the motor.
Do a few burnouts with the car. Then take the head off grind the valves, put the real springs on. And go racing, It made it hard to exchange heads, as the notches were head specific. That was when they checked for duration and overlap.

02-24-2010, 07:29 PM	#11
art leong VIP Member Join Date: Dec 2001 Location: Richmond Hill, Georgia Posts: 2,003 Likes: 0 Liked 1 Time in 1 Post	Re: Challenger Drag Pak Owners I understood that the way they interpret the rules today. If the valve makes a notch in the piston, it would not be allowed. Years ago with the hemi car we would put a worn out set of valve springs on the motor. Do a few burnouts with the car. Then take the head off grind the valves, put the real springs on. And go racing, It made it hard to exchange heads, as the notches were head specific. That was when they checked for duration and overlap. __________________ Art Leong 2095 SS