When testing the Shortrams, (and the other manifolds) the cam was installed 2° advanced. For the last few pulls I backed the cam up to 116° as the factory cam was installed 2-4° retarded to help time the pressure wave at the valve fill the cylinders better. Well that was a lot of work for nothing as it killed the hp and torque.
When I put the hydraulic roller in my '60 Plymouth short ram car, I ask Dave Hughes about retarding the cam. He advised no way should I do that with his cam.
My car ran a best of 11.66 at 3700 lbs, My carbs were smaller Carter 500's (worked over) and I was at 470cid. Never had it on the dyno, but if you run the Wallace calculator on that run (using weather readings), I made 445 HP based on ET and 408 HP based on speed (rear wheel HP I suppose)..
