My take on the oiling system crossover tube for the small block
No Duane, it's all the SAME issue and it gets clouded by all the other crap about this leak and that oil feed. The main bearings NEVER (well almost never...I've seen guys who can wreck anything) run out of oil. When they do, the issue is somewhere else. Not enough oil. I've seen the oil pump drive shear off and that killed all the bearings. I've seen lots of stuff like that. When you are killing Rod bearings and the mains have oil, you do NOT have an oil feed issue. That's oil timing.
And yes, the Chevrolet system is so close to the Chrysler it's not funny. The lifters (in the OE production stuff) for the Chevy get oil first, just like the Chrysler. Again, it's all about oil timing to the rods. You can argue all you want, but when the main bearings get oil and the rods don't, how does the crossover fix that? How does adding oil at the front fix it? I keep asking that question and all I hear is Chrysler approved the crossover for 10k and dammit that's right. It's not. It's wrong. It does nothing and I've personally broken the parts to prove it.
Again, under 8k there is no reason to do other than control the oil to the lifters by using a tube or bushing the lifter bores. You can do that with hydraulic lifters and drill small holes in the tube or bushing and just restrict the oil to the drivers side right at the feed at the number 1 main. So the discussion is a ridiculous one if we are talking about engines that are turning less than 8k. They will oil if done correctly.
You can't fix what you don't acknowledge. And you can't fix what you won't accept. Rod bearing oiling is a timing issue. The engineers didn't guess where the feed holes should be. Except Chrysler. And Buick. And Olds. And Pontiac. And who has Rod bearing issues? All the above. It's about oil timing and nothing else.
If you can't keep the rods in under 8k you need to look at the basics of oil control. Not a crossover. It's a waste of time and I hope no one ever does another one.
You said earlier that you approve of bushing lifter bores and or tubing the passenger side, all I am saying is if you look at the basic
Elements of front oiling, or tubing the galley or running the crossover line, all three have the cutting of the supply to the drivers side lifters in common. Even if you believe that the crossover line does not help anything, it does not hurt anything either and will allow oil to the lifters if required.
You like how the chev oils, you think it's a better design, you think the oil timing is better and it probably is, but other main parts of the Chev are very different. It has 3 separate galleys instead of the Chryslers 2. The chev does not try to feed its lifters and 16 rockers
Off of a bearing oil supply. IMHO that is drastically different.
In fact if you look at where those 3 galleys on the chev are getting their main supply(right from the main pump supply), adding the
The crossover tube on the Chrysler starts to look like the Chev.
The timing imho is fixed by slotting the bearings oil feed to 1/2 long.
It puts the supply right in the center like the Chev with an extended
Dwell time. Guitar Jones does this and the Sanborn thread he did this. They did not explain what this does, but logic tells me that is what's happening.
It fixes the oil timing to better feed the rods. If the mains always have oil then how do you explain my old motors 2&4 main bearing failure that just by coincidence
Happen to have grooved cam journals on 2&4 as well and that those two journals happen to feed to rockers on both banks. Yet the rod bearings looked fine.
There are other problems as well besides the oil timing.
The crossover tube is a good mod if your particular needs require it.