hard or soft copper line for a valley oil gallery bypass line?
Velocity is just another word for excessive flow or speed if you will.The crossover line does supply oil to the other side and if done right only slows the oil at #3&4 main, the majority of the speed is killed by the front setscrew. When you tube the passenger galley, it cuts the leaks to the lifters. But the set screw that gets put into the saddle cuts the flow to the drivers side lifters, but doing that also cuts the speed or excessive flow
In the galley allowing it to better make the turn to the mains. If you get more oil to the mains, you get more to the rods too.
Read the Sanborn notes I sent you. He never used full groove mains, and he front oils too, and runs a crossover,even with bushed lifter bores. Way different than most of what you have said. We have talked about
Passages sizes, pressure drops, entry and exit angle of fittings,front oiling, but you are hung up on terminology and keep talking
about the crossover as if that the entire mod.
It is not the entire mod and you keep taking things out of context. You refuse to explain your opposing oil columns even when a drawing is supplied and a member asks you to explain so that he might learn something.
Coming back on here under a new name and starting a rehash from what 3 years ago imho looks like you are praying on the unsuspecting, but hey, that just me.
I don’t like the new name only because I like to know who I talking to.
The crossover mod alone is not good enough
For me. Neither is tubing the block. I have learned and made improvement from the experience of others. The stroker small block
Mods go even further. I’ve implemented them too and I have had a custom cometic
Head gasket designed based on Sanborn cooling mods that a few members on here told me works well. I supplied pictures of the part number so that any member can buy it.
First of all, I didn't come on here to hash anything out. Once again, the crossover shows up and it doesn't do what is claimed.
I get why Sanborn did it. He was pushrod oiling. He had to get oil over there.
I'll say it again. Oil velocity has nothing to do with the rods not getting oil. I have never hurt a main bearing. ever. So I can't say why you are. And I understand that the crossover isn't done by itself but I have seen it done by itself.
As to oiling the rod bearings, you first have to stop the leaks at the lifters. Once you do that, there is more oil for the bearings. Then you have to do something with oil to the rockers IF there are getting full time oiling with a groove around the cam bearings. More oil for the rods.
The next thing is getting the inlet side of the pump as big as you can. The higher the grade of oil, the harder it is to get oil up the pickup. The higher the RPM the worse it is. In the 1978 Mopar Performance book, they cover this. they tested a HV pump against a standard pump with the factory sized pick up and the two flowed exactly the same. Until they got two 1 inch pick up tubes on it. the pumps flowed the same. I don't think you need two 1 inch pickup tubes with today's oil but clearly the OE sized pickup doesn't do any good as far as a HV pump goes.
How many guys are adding HV pumps expecting more oil flow and it didn't do a thing???
I can't remember for sure if Sanborn ands I discussed bearing clearances but that is another issue. Big bearing clearances increase how much oil the engine uses. For a Chrysler sized rod bearing I'm all the way down to .0021 and for the mains I'm at .0023. That decreases oil demand at the bearings. IIRC he was still running 20W50 oil but I'm not 100% sure if I am remembering that correctly. He was a circle track guy so I'm pretty sure he was still stuck on that oil. That oil and the clearances it requires increases the demand for oil at the bearings. Not good.
And we aren't even talking about the crossover yet. If you do what I have outlined above you an run 7500 all day long. No need for a crossover. And the oil isn't moving too fast.
As to getting oil and no flow, you need to look at it as it is. You can have what another guy called "wobble" but I don't call it that. He said there are varying pressures across the main oil gallery. If you run two columns of oil against each other, every time the pressure changes in the gallery the flow will will move back and forth in the pipe. If the rate of change is fast enough the oil will stall. That's the word I was looking for. Stall. That's what it was called by the guy who did the mods on that TA block engine I had. The flow will stall where the two columns meet. And somewhere the oil won't go to the bearings. Different diameters have different pressures. Different lengths of pipe have different pressures.
If the engines needed more oil then we'd have hoses plugged in everywhere. They don't need more oil. They need oil at the right time at the bearings. The crossover does nothing to address that.
I'm going to print off Sanborn's notes today so I have a copy.