[Cliff R]

Look at the numbers we got on the dyno with the Old Faithful Clone HR cam on a 114LSA compared to the XR276HR cam in a very similar engine.

The bigger cam idled better, and made more power at every rpm, nearly 90 MORE HP, and over 500ft lbs torque clear across the loaded rpm range.

With the bigger cam on a wider LSA peak HP moved up almost 1000rpms compared to power ending abruptly at 4900rpm's with the smaller HR cam.

Before someone says "I never plan on revving my 455 that high, it's just a "street" engine", keep in mind that at 5000rpms we could still shift the engine with the bigger cam in it and make good track runs, and enjoy nearly 519ft lbs torque @ 5000rpms vs 441ft lbs the smaller cam was making.

I do this all the time with my own engine, shift at 5000rpms for all track runs, and it only slows down about half a tenth or so compared to shifting it clear up at 5800rpms. Basically the car runs good using the broad/flat torque curve, and there is no need to "grind" up the engine with a much higher shift point.

I also use that deal to my advantage at the track. If I'm not getting the guy covered I'll "buzz" the engine a little harder and push him out on the top side, never giving him a chance to back out of it and get the win light.

Short shifting not only saves the engine some, but it also helps me slow the car down to stay roll bar legal, as flat out it will run almost into the 10's in good air, and really low 11's in the "heat".

https://www.youtube.com/watch?v=6zVdoLR-VzM


.....Cliff