Chevy Big Block engine

Reduced ratio rockers lessen spring pressure and lower lift for proper camshaft break-in

January 2008 -- Proper break-in of high lift flat tappet camshafts in performance engines is often achieved by removal of the inner valve springs during the initial-start up period. This critical procedure can often be a time consuming and difficult process. To ease this process, COMP Cams® introduces Big Block Chevrolet Aluminum Break-In Rocker Arms that feature a reduced 1.5:1 ratio as opposed to the factory 1.7:1 ratio.

COMP Cams Big Block Chevrolet Aluminum Break-In Rocker Arms

With this reduced ratio, the effective camshaft lift and valve spring pressure are reduced for easier camshaft break-in.

Anniversary 427 Big Block serial #001 to be auctioned on January 18 - Collectible engines to be offered to public early in 2008

2008-01-11, SCOTTSDALE, ARIZ – The first produced, all-aluminum Anniversary 427 Big Block crate engine – based on the legendary ZL-1 – will be auctioned during the Barrett-Jackson auction on Friday, January 18 in Scottsdale, Arizona. Only 427 of the special engines will be built.