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RPM427 · 06-05-2002, 02:46 PM

I am planning on installing a set of AFR 185 (with 2.02 intake valves) cylinder heads for my 91 GT. I also have a Holley systemax intake along with 3:73’s, 255 in tank fuel pump, MSD ignition.

My question is what cam you suggest I run. I was looking into comp cams xtreme line up. I would like to not modify the short block if possible (i.e. notch pistons). What is the highest amount of lift and duration I can run with 1.6 ratio rockers without notching the pistons? I’ve been told I can go as high as .555 by some, and some tell me I need to notch the pistons regardless of lift due to the larger valve size. Your help will be appreciated.

06-05-2002, 02:46 PM	#1
RPM427 Registered Member Join Date: Aug 2001 Location: Huntington NY Posts: 573	AFR cylinder heads I am planning on installing a set of AFR 185 (with 2.02 intake valves) cylinder heads for my 91 GT. I also have a Holley systemax intake along with 3:73’s, 255 in tank fuel pump, MSD ignition. My question is what cam you suggest I run. I was looking into comp cams xtreme line up. I would like to not modify the short block if possible (i.e. notch pistons). What is the highest amount of lift and duration I can run with 1.6 ratio rockers without notching the pistons? I’ve been told I can go as high as .555 by some, and some tell me I need to notch the pistons regardless of lift due to the larger valve size. Your help will be appreciated. __________________ -1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway -1994 Ranger w/ 427cid windsor (daily beater) check it out!