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Steve Stickel · 12-17-2013, 01:22 PM

From the 2014 IHRA Rule Book... Pure Stock lost a little "Purity" today .. This is posted for the guys who might have a cam on order or will be soon..

12/10/13
p. 48 Pure Stock: Camshaft: Camshaft must retain stock lift for horsepower claimed per IHRA Technical Bulletins. OEM duration and overlap is optional

Can't get too crazy as the valve springs still have to check at OEM pressures, open and closed. Guess this was changed to speed up tech / tear down or maybe lack of data supplied by the OEM's?

12-17-2013, 01:22 PM	#1
Steve Stickel Member Join Date: Feb 2012 Location: South Coast, Massachusetts Posts: 146 Likes: 160 Liked 50 Times in 23 Posts	Pure Stockers New Camshaft Rule !!! From the 2014 IHRA Rule Book... Pure Stock lost a little "Purity" today .. This is posted for the guys who might have a cam on order or will be soon.. 12/10/13 p. 48 Pure Stock: Camshaft: Camshaft must retain stock lift for horsepower claimed per IHRA Technical Bulletins. OEM duration and overlap is optional Can't get too crazy as the valve springs still have to check at OEM pressures, open and closed. Guess this was changed to speed up tech / tear down or maybe lack of data supplied by the OEM's? __________________ Steve Stickel 1161 Stk 1167 SS