CLASS RACER FORUM - View Single Post - Aftermarket/Replacement Cylinder Head Rule Change

Crew Chief · 12-22-2017, 12:30 PM

I can remember a time when a friend submitted a replacement head to NHRA. He was told to bring the new head to a national event along with an OEM head for comparison . The head was looked at by techmen who knew what they were doing. They rejected the head because the intake runner and combustion chamber had been changed in the new casting.

One wonders if the same procedure is used today when a new head gets accepted. By the way, who is accepting all this stuff anyway?

12-22-2017, 12:30 PM	#8
Crew Chief Member Join Date: Jun 2003 Posts: 184 Likes: 0 Liked 10 Times in 6 Posts	Re: Aftermarket/Replacement Cylinder Head Rule Change I can remember a time when a friend submitted a replacement head to NHRA. He was told to bring the new head to a national event along with an OEM head for comparison . The head was looked at by techmen who knew what they were doing. They rejected the head because the intake runner and combustion chamber had been changed in the new casting. One wonders if the same procedure is used today when a new head gets accepted. By the way, who is accepting all this stuff anyway?