GM didn't put it there for a reason..... that's my thought...

Well you cant Knock the guy for trying to do the rite thing. As far as GM didn't put it there don't use that card because GM didn't do a lot of stuff we are doing. We are making more power than any classic car could dream of with stock GM stuff,

On behalf of the NAY-Sayers of this video .... To be fair, he would have had to heat up that oil to make the video more real life example. I know I dont run my motors at redline speeds with cold thick oil... Oh and no I don't believe in using screens... Just more stuff to worry about coming undone and F-ing things up

As per usual, you are right there to back up the desk top dyno operator with the glass ego.

Priceless!

In the ten years I've been on the net, I'm not sure I've seen anyone display more childlike behavior, on a regular basis, than yourself. You should be proud of that.

A 60+ year old man swinging from the sack of his internet idol. That is rich!

Carry on with your tantrum mike.

True story lol

How many of you have seen valley screens keep debris out of the bottom of the motor? Rocker arm adjuster backed off and ended up in the screen. Lifter still broke and trashed the bottom end. Actually windowed the block took the oil pan with it.

If also seen a screen trash the bottom end. Something about using epoxy on a big hunk of cast iron that is constantly expanding and contracting that doesn't sit right with me. At the same time I've seen tons of blocks that had screens in them that stayed put.

you always have something to say about THE TRUCK DRIVER OR THE DESK TOP DYNO OPERATOR.i have known him on a personal level for quite a while and i can tell you he is a very smart guy.he has a lot of experiance with boats and engines in general,and you do not.you try to belittle him,and myself for a reason unknown to me but i could care less what your reason is.you talk about joe acting like a teen age girl but that would be a step up for you.i guess you are all butt hurt because you got laid away by one of the carb guru,s and are jelous of those who actuially know something about a carb and don,t get screwed.the truck driver is out on lake michigan every weekend with his 90 mph boat,while you on the other hand are dreaming of some day getting your engine running.joe contributes a lot to this site,what have you offered besides sarcasim and witless comments?it,s guys like you that give oso a black eye.il bet you are one of those guys that wears one of those really cool helmets while peddeling your huffy around,lol.i think you would be happier on one of the bicycle sites.they don,t need an engine to dream about!

I used to use epoxy in intake ports alot that stayed put. Always made you nervous, however..........

Anyway, my last lifter blow up (was hydraulic) was about 10 yrs ago. I found all pieces in the valley, but the circlip. A screen may have caught it.

I installed screens in my lifter valley before I knew that there was such a controversy about it. I was worried enough after reading all the comments that I actually considered pulling the intake and going in there to remove them. I am running the stock 8-quart pan with a 10778 Melling pump, so I definitely had some concerns. When we dynoed my engine, I had them run it on the dyno in a loaded "steady state" scenario at 4500+ RPM for several minutes. My reason for doing this was two-fold - 1. I wanted to make sure the oil pressure stayed steady and showed no evidence of drainback or windage issues, and 2, I wanted to make sure I did not have any lean spots. Running a quick 3 second dyno sweep like you would for a drag engine doesn't usually give you the full picture about how things are going to work in the boat running across the lake at full throttle for 5+ minutes.

In the end, oil pressure stayed steady, but I did find that lean spot, and we made appropriate tuning adjustments to correct it. I'm glad I ran this test. I personally now think there are only a few circumstances where the screens will actually help you. In a marine engine it is much more likely that you will have detonation issues, valve heads getting tuliped or knocked off, or lifter issues, none of which will be helped with lifter valley screens. Good luck with your build.

Here is my reason for the screen. When I floated the valves, the push rod broke into 3 pieces and 2 lifters flew out of their bores. I found all the pieces of the pushrods and the snap ring from the lifter came out and all the guts of the lifter came out. I found all the parts of the lifter in the lifter gallery except for the metering disc from the lifter. I had to pull the whole motor out to find that one small stupid disc. If screens were in there, it would have caught the disc. I run hydraulic flat tappet lifters so no worries about and roller wheels breaking. As far as the video of dumping oil into the lifter gallery goes, I say it is misleading. The top end of your motor does not flow that much oil. have you ever seen the very small stream of oil running back to the block at idle, high RPM would be considerably more, but not that much, and the video was with cold oil.