lifter galley crossover tube

Cudafever said
Thanks to everyone that participating in this thread.
some may have lost interest in the first paragraph, and that is ok.
How ever i live for these kind of threads!
A little late on this thread but have a few question, that have been explain.........but i still don't get fully. First i have never heard about this 70* oiling, and it make sence but how does the cross drilling actually look. and why it is a BAD idea in most cases.
Explain more as to when it is a good idea and why.
2nt i would have been the first to jump on the theory that oil will always travel to the lower pressure. although i still believe this.(head porting theory) The anlage of the defrost/ heater duct sure got me thinking.

I think this kind of talk don't come out, or never get the discussion that we have had the privilege to have this time., Because 95 percent of us have never revved are engs past 7000 (on purpose) and probably only 1% have purposely built and eng to turn 8000+rpm.

When i built my 408 stroker i told my machinist that i wanted a bottom end that would hold up to 8000 rpm. Which he provide for me, but I built. From what my machinist suggested and what Guitar Jones provide, i felt i had a bulletproof bottom end. I did every thing that he suggested EXC. the crossover tube. The way i tried it on my test motor, i couldn't get the intake on. in the end i put on some nice RHS head and a cam that runs out of breath at 5800 rpm.(because that work with all the other part in my car.)

Any way some day/year/century, these mod may become Very important.

Cross drilling isn't bad, it's just usually not needed. If the crank is cross drilled correctly, if you keep the RPM below about 7000 RPM. I can't remember if it was Scat or Eagle but for a while even the Chevy cranks were coming cross drilled. I let them go if they weren't winding it up. If they were, I plugged the hole with a set screw and turned the journals .010 under or if it was a real hot rod, I'd turn the small blocks to small journal and the big blocks I'd turn to SBC large journal.

If the cross drill hits the Rod feed at the surface of the crank, cross drill is in the best spot it can be. Some of the real bad bearing eaters had the cross drill hit the Rod feed hole in the center of the Rod journal. Those would actually pump oil away from the rods, especially over about 6500.

You would be correct about very few guys turning 8000 or more. Especially if you want to make power up there. Like I said, it took me a tunnel ram, on square ported W-2 heads with 2 flying toilets to do it. And that was with a 286/298 roller on 340 inches. More displacement and it would have been almost impossible. Even with W-5 heads. That's why you don't hear about oil timing much and at some time in the 1990's or early 2000's Chrysler started offering blocks with the oil timing corrected. They had to, or the Pro Stock Truck guys would have been screwed.

BRING BACK PRO STOCK TRUCK!!!!!

I'd have to go back and read the heater duct analogy again because I can't think of any time high pressure doesn't go to low pressure. That's how your vacuum cleaner, carb and even your engine operates. On pressure differential. The lower the pressure in the cylinder, the better the cylinder fill.