[smittyseng]

I spent alot of time dynoing my 455 lately and just to see what happened we put a K/N 3X9 air cleaner on the motor for a pull. I OFTEN see these on Pontiacs featured in magazine articles, even a few drag cars. Well, on this 455 in back to back testing it whacked a SOLID 35-40 hp off the top end AND sent the AFR's down almost 2 full points. We actually previosuly used this air cleaner on my friend Bob aka "goatasaurus rex" on here's 69 gto at the race track and ran as fast as 11.67's with it and ran 11.80's all the time. We were always going to take it off and see what would happen but without a hood on his car couldn't race without a air cleaner and never bothered bringing a different one, I can only imagine we inadvertently tuned around the restriction it was causing when reading our plugs and jetting the carb. We now know better and I thought I would mention it in case someone else is using the same one, Smitty