CLASS RACER FORUM - View Single Post - Speaking of Z-28's; check out the new D/S record!

Myron Piatek · 04-11-2008, 07:16 PM

HP factors to the '71's, which have the highest rating for Mopar 4 bbl small blocks. "Natural" class is "E" and they can adjust weight to "D" or "F". It wasn't too long ago that NHRA allowed moving to a faster class with weight removal. (Last year or two?) That's become easier over the years with lighter brakes, wheels, etc.

It's also how the '70 340 6-Pack Challenger T/A ended up in C/SA, and set the record at 10.33! They are not that heavy either.

1970 340 4bbl's have a smaller carb and the '72's lost compression and valve size.

04-11-2008, 07:16 PM	#4
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: Speaking of Z-28's; check out the new D/S record! HP factors to the '71's, which have the highest rating for Mopar 4 bbl small blocks. "Natural" class is "E" and they can adjust weight to "D" or "F". It wasn't too long ago that NHRA allowed moving to a faster class with weight removal. (Last year or two?) That's become easier over the years with lighter brakes, wheels, etc. It's also how the '70 340 6-Pack Challenger T/A ended up in C/SA, and set the record at 10.33! They are not that heavy either. 1970 340 4bbl's have a smaller carb and the '72's lost compression and valve size. __________________ LOCOMOTION Racing Last edited by Myron Piatek; 04-11-2008 at 07:27 PM.