Big block rocker arm ratios

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Big block rocker arm ratios #865632 11/28/10 01:42 PM 11/28/10 01:42 PM
Joined: Sep 2006 Posts: 1,139 West Tennessee R rbstroker OP super stock
rbstroker OP super stock R Joined: Sep 2006 Posts: 1,139 West Tennessee	I understand that the stock stamped steel BB rocker arms are nowhere near 1.5:1. What about the stock factory adjustable ductile iron rockers? Can any simple improvements be made to the rocker oiling system? This is the land of the free because of the brave

Re: Big block rocker arm ratios [Re: rbstroker] #865633 11/28/10 02:07 PM 11/28/10 02:07 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: Can any simple improvements be made to the rocker oiling system? Drill horizontally into the back of the head then down at an angle from inside the threads in the rear pedestal (want about an .080" orifice, a carb jet works in the back of the head) then feed them from a T at either of the NPT ports at the top rear on the block. this lets you drill/tap the vertical passages from the crank to the cam & screw in a setscrew w a 1/16" hole in each one. And this is the prob that too much oil leaks from (especially) the #4 cam journal potentially starving the rods that are fed from the #4 crank journal. If not externally feeding the heads the #4 should be restricted to 1/8 and the other (4) to 1/16 and if externally feeding then restrict em all to 1/16. The rocker arm assy's themselves have no oiling probs just have the small oiling holes in the shaft down and closer to the fulcrum (offset slightly toward the valve side) live every 24 hour block of time like it's your last day on earth

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