0111Gmhtp Pumping10 Zoom
396 Stroker Motor - Air Induction - Pumping Up, Part 2
We chose to use an ATI damper (part No. 917780) for our 396 because it meets SFI spec 18-1 (required for cars running 10.99 or quicker) and because it will extend the lifetime of our bearings and provide a smoother accelerating, more powerful engine. Stock dampers typical only work up to about 4500 rpm. At higher rpm OEM dampers stop dampening and the bearings really get hammered from the combustion pulses. A good damper like the ATI works all the way up to 10,000 rpm and can be worth an extra 10 hp on a motor like ours. Our particular damper is made for motors with a stroke longer than 3.75 inch; longer stroke cranks have more mass to control and this requires additional material in the internal damper ring. View Related Article
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