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Unit 5302 · 03-31-2002, 02:36 AM

I doubt there is any difference. The only roller rocker cars from the factory were the Cobra's.

While your car may be "roller cam," that's a totally different animal than roller rockers. Roller cams means the lifter has a roller tip that rides along the cam lobe. Roller rockers have a roller to reduce friction on the rocker. The rockers at the top end of the engine are almost always stamped 1.6:1 ratio, and pedestal mount. Very few production Mustangs had stud mounted rockers, and as far as I know, the Cobra was the only one that came with a 1.7:1 ratio, or a roller rocker from the factory. There may be some others way in the past, but not that I'm aware of right now.

03-31-2002, 02:36 AM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	I doubt there is any difference. The only roller rocker cars from the factory were the Cobra's. While your car may be "roller cam," that's a totally different animal than roller rockers. Roller cams means the lifter has a roller tip that rides along the cam lobe. Roller rockers have a roller to reduce friction on the rocker. The rockers at the top end of the engine are almost always stamped 1.6:1 ratio, and pedestal mount. Very few production Mustangs had stud mounted rockers, and as far as I know, the Cobra was the only one that came with a 1.7:1 ratio, or a roller rocker from the factory. There may be some others way in the past, but not that I'm aware of right now.