[Ace23]

Originally Posted by blykins

I'm not sure why it was used. Poor choice. That much duration in a hydraulic roller with a 427 inch engine will kill the bottom end and kill the top end too. As I said before, this is what all the fingers are pointing at, IMO.

Nothing wrong with the 112 LSA, BTW, it helps with vacuum and with making the curve broader, but that duration is just out of the ballpark. When you see advertised durations near 320-330 degrees, that's why your cranking compression is very low.....TONS of overlap and the intake valve is not closing until very late.

I have custom hydraulic rollers that I like to use for my 427's and as I mentioned before, you're about 12-14 degrees too high...

You will get a kick out of this. Just come across an 11 year old copy of a second strike article in all the information that came with my car. There was a specific article on a 427 camshaft.....and there right before my eyes my exact camshaft duration numbers were spelled out with a description following that called it a turd cam with no bottom end and not enough top end that required 2400rpm in top gear!