Warp Speed wrote: ↑Fri Nov 29, 2019 12:33 pm
ClassAct wrote: ↑Fri Nov 29, 2019 11:17 am
Warp Speed wrote: ↑Fri Nov 29, 2019 9:04 am
From the above article:
Concise Guidance
Improvements to the 351C lubrication system should focus upon correcting the design flaws rather than the symptoms.
Which is EXACTLY what I'm saying. It's a design flaw. You have to fix it, and full groove mains won't do it. It's helps, but it's not the fix.
Actually, that's what I've been saying, and you have been arguing for pages and pages, that it is a "timing" issue in the block. You based ALL if this crap on a "the hole the crank must line up with the holes in the block, at 70*ATDC, or your doomed" theory, and couldn't be fixed, when that is simply not the case.
AGAIN, the first step to proper oiling (and I went over this many pages ago), is supplying the main bulkhead feeds with a quality supply. This is something that a Cleveland (and many others you've mentioned) fail at, due to not having a seprate main oil galley, but instead use a bank of lifters to do it. Pretty simple actually.........
Other improvements can be made along the way in the system, but if this isn't addressed from the get go, everything else is just a band aid!
Now you may have way more experience with high speed oiling systems, as you claim, than I do (
) but it is clearly a quality supply issue, and if you think otherwise (feed timing ect.), you are incorrect, plain and simple.
You ain't listening. I read that entire thread and would have been laughing had it not been so serious. Let's review.
That thread said you need to run full groove main bearings (not a fix) just like I've been saying. It's a band aid. Why do you want to send oil to the rods all the time? Because it's better to get some oil there all the time, even if most of it is at the wrong time. Pay attention because I'm agreeing with you. Extra oil going to the rods all the time is a power loser. But, if you want to keep the rods in the block, it's what you do, and it works. To a point.
Then I read the same old sorry argument about oil speed moving through the oil gallery. That's a basic error. We are dealing with a simple hydraulic system. So that is wrong. In fact, it is so wrong that the fix for oil speed in that thread was to add oil pressure!!!! WTF? If the oil speed is too great, you'd reduce the pressure to slow the oil down. You'd increase every single feed passage to drop local oil speeds. Yet, in that thread an increase in oil pressure was suggested. Again, it's a bandaid and nothing more.
Then we get to the priority main oiling. It doesn't matter. Unless you lose a lifter and it uncover the oil gallery behind the lifter. The you will lose oil pressure to the mains. If it was priority main oiling, the lifter could blow out of the bore and lay in the valley and the mains would get oil. But it didn't fix the issue. Again, use your God given brain and look at the SBC. It wasn't priority main oiling, and yet, it will oil way past 10k so how does priority main oiling fix that when the SBC didn't have it. In the same era?? What is the difference? It damn sure wasn't priority main oiling.
Don't get me wrong. Priority main oiling should be the way it's done. As I've pointed out over and over and over and over the lowly SBC didn't have it, and it would still oil. Again, I worked on a national record holding Comp Eliminator SBC that went well over 10k all the time. Wet sump. And not a single block he had at the time had priority main oiling. And yet, the Rod bearings look perfect, just like the mains. Hmmmmmmm. What's the difference? I know.
The dreaded tapper bore bushings. LOL. Really? I'm all for stopping any unnecessary oil leak any where I can. Therefore, I'm all for bushing the lifter bores. Not just for oil control, but to correct lifter placement. But does it fix the issue? Nope. Seen many blocks with lifter bushings and rods hanging off the crank. Is that the fix? Nope. It's a band aid. And just like the thread you quoted from, it's to try and fix an engineering issue. Even the guy who wrote that long post knew even with lifter bushings you were just delaying the issue because he said to run full groove mains with the bushings!! Again, not a FIX but a bandaid.
I'm tired of typing so I'm done. I suggest you get a couple of blocks together and put them side by side. Not some block you get to use. Get a non priority SBC and a SBM or BBM or 351C or whatever. A Pontiac. And then look at what the issue is. It's oil timing. Getting oil to the rods at the right time, with the right flow and pressure.
It's that simple. Anything else is not a fix, it's a cover up. You can color it any way you want, but nothing in that thread posted above is new or shocking. It's what everyone does when they don't know how to fix a simple Rod bearing oil issue.