From a old catalog, the discription for the Ultradyne 288/296 hyd flat tappet with 231/239 at .050 and ground with a 110 lobe separation, .485/.507 lift ....
"Hot street/bracket cam, 3000ss converter or 4-speed. No power brakes. Power 3000-6000."
I believe Lee's best with that cam in his first gen bird was 11.46 at 115.4 mph with a 1.53 60-ft. It was later when he switched to the Ultradyne 247/247 at .050 solid flat tappet ground with a 108 lobe separation that he ran 11.27 at 119.61 mph. It was my understanding the "bigger" solid cam was just as driveable as the smaller hyd cam. I wonder what his comment would be about "no power brakes" with the small 231/239 cam ?
Jim Butler stated the Ultradyne 276/284 (243/
[email protected]) soilid flat tappet cam ground with a 110 lobe separation was good for 1.2 bhp/cid with 9.5 compression (540 hp /455cid)