rocker arm oiling HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I am doing this mod on my new build very similar to how you have done it. This mod is now in the stroker small block book by Jim Sziligy. You are doing it slightly different because of the rockers you are using. I am using a bushed rocker(Norris) and the recommended
Size hole in the oil galley is .050 thou with no restrictors in the deck or head. Because you drilled such a large passage in the galley you will have to restrict elsewhere or you will have very low oil pressure.
You should post a picture of what you are doing because many people confuse this crossover line mod with the crossover mod for number 4 main bearing which is completely different.
What you are doing by drilling the new relocated holes in the cam bearings is twofold. One is completely cutting off the oil to the rockers from 2&4 and restricting all the cam bearings to 1/8 inch feed from the mains. I did that too exactly the same.This makes the block function as a priority main system if you have also cut or restricted the supply to all the lifters. This should make all the rods and main bearings oil much better.
I am of the opinion that the appearance of a counterbore in the main bearing saddles in later blocks,along with slotted oil feed holes in the bearing shells fixes the oil timing because the oil can exit the bearing shell at full flow, at the 12 o'clock position just like a Chev. The slotted oil hole also increases the dwell time that the rod oil passages have to fill with oil. Although the recommendation for the supply hole to the rockers is .050, I went with .080 to supply both sides of the block. That is a lot of oil if it is continuous full time. I like your idea of easily being able to adjust it under the rocker shaft though.
The brake line in the picture does not plumb into the galley, only the passage up to the rockers, but technically it is called a crossover line.
I am doing this mod on my new build very similar to how you have done it. This mod is now in the stroker small block book by Jim Sziligy. You are doing it slightly different because of the rockers you are using. I am using a bushed rocker(Norris) and the recommended
Size hole in the oil galley is .050 thou with no restrictors in the deck or head. Because you drilled such a large passage in the galley you will have to restrict elsewhere or you will have very low oil pressure.
You should post a picture of what you are doing because many people confuse this crossover line mod with the crossover mod for number 4 main bearing which is completely different.
What you are doing by drilling the new relocated holes in the cam bearings is twofold. One is completely cutting off the oil to the rockers from 2&4 and restricting all the cam bearings to 1/8 inch feed from the mains. I did that too exactly the same.This makes the block function as a priority main system if you have also cut or restricted the supply to all the lifters. This should make all the rods and main bearings oil much better.
I am of the opinion that the appearance of a counterbore in the main bearing saddles in later blocks,along with slotted oil feed holes in the bearing shells fixes the oil timing because the oil can exit the bearing shell at full flow, at the 12 o'clock position just like a Chev. The slotted oil hole also increases the dwell time that the rod oil passages have to fill with oil. Although the recommendation for the supply hole to the rockers is .050, I went with .080 to supply both sides of the block. That is a lot of oil if it is continuous full time. I like your idea of easily being able to adjust it under the rocker shaft though.
The brake line in the picture does not plumb into the galley, only the passage up to the rockers, but technically it is called a crossover line.