Attached is a photo of a Crower 66233E lifter pair. It is described as a pushrod oiling 383-440 Chrysler tall deck lifter. The little hole is for pushrod oil and the big hole is for the lifter bearings? and the notches are for what? and how do these holes receive the pressure needed? Crower says that the pushrod oiling hole must not intersect the oil galley directly. Anyone know this lifter application? Comments please.

I was gonna buy a set of crowers but the hole placement was right in line with the lifter bushing hole in my block which would give to much oil up top...

The notches don't matter, there probally for a .903 diameter Chevy type oiling, one body, many applications The pushrod hole is in the proper locatiion to intersect the main stock lifter oil passage When in doubt call Crower BTW, is your block bushed in the lifter bores or still stock? If bushed check the oiling hole location in the oil galley side to make sure it is there If bushed and there not there you will need them to oil the pushrods If not bushed, your good

I think the notches do matter since they come out of my lifter bore by about .140 at the top. Crower gave me the notch dimension as .490 and the dimension from the bottom of the wheel.
This will provide a big direct path for oil from my oil galley. If they were only .350 or less all would be good for me. If I could get them to eliminate the machined notches altogether then they will work OK?
I'm surprised that the holes for high pressure pin oiling and pushrod oiling would work with no notches or band at all. Would they?
Seems to me the oil pressure would go out the top and bottom of the lifter before pressurizing these holes. (Shortest path?)

Actually its not the "shortest path" but rather the "path of least resistance". So, if the pushrod has no oil in it then it is the path of least resistance until it does. And then it just keeps flowing because of the pressure.

What is the lift of your cam?

Things that make you go HUH !?!? ... I just bought a set of Crane 66550's and they are IDENTICAL to the Crowers in your photo except they say Crane on the tiebar !!!

Yes, you are right about the pressure being less at the hole no matter what the distance is from the oil galley. Why have the 2 side grooves at all? Even if they are there because the body will also work in a Chevy, why are they needed in a Chevy? The point being can I safely eliminate them?

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The point being can I safely eliminate them?

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Eliminate what, the notches? How?

Again, what's the lift of your cam?

Thanks for your response.

Cam lift approx .500, valve lift is .800. I was trying to get Crower to eliminate the operation for the notches, but I have been unsuccessful. Now it seems they don't have anything that will work. I really want to try their Enduramax lifter. So I guess I'll bush the lifter bores.

Now there is a whole new set of questions. I have an aluminum block hemi and the cylinder deck is covered in a way that prevents the lifter from going into the bore if it is too high. But I need to extend the bore to cover any oil holes or notches. The only lifter for which I have any dimensions is the one I showed you that you said looks like your Crane.

I'm not completely certain how that lifter works. Have you used yours yet? My concern is that if an oil band lifter has the pushrod oiling hole only about .030 above the band and the HIPPO (high pressure pin oiling) in the band, will the notched style work as well? I have a banded set now, but the oiling hole comes out of the bore. I've heard stories about guys with the oil band lifters, putting a very small groove between the band and the oil hole for the oil to follow because they were not getting enough up top. Now with this notched type, the oiling holes are much further away. Need to hear from someone. And Crower says they can't help? I have also heard that Crower don't care much for the Mopar bunch. They are happy just dealing with the much bigger everyday Chevy or Ford crowd.

But anyway, if I'm getting my lifters bushed, it is recommended that I put a little .045 hole in the bushing to feed each lifter. That part, I am OK with, but this lifter without an oil band, I don't know.
Is the combination of the bushing and this lifter going to be a problem? Any advice?

I rethinking your concerns, I don't think those notches protruding above the bore at full lift are going to cause you any problems. Here's why ... at full lift those notches will be above the oil galley so there should be no severe flow or pressure loss. Furthermore, the lifter bore intersects the oil galley less than 50% and if you picture a crosssection of this, the compound curves diminish at the tops and bottoms of the bores so again they would not be exposed to the lifter notches at full lift.

The call is yours but I'd check further before bushing the block. Just my 2 cents.

Hello Stanton. Thanks for your comments.

I am sending you a CAD drawing that shows you the 66233E lifter installed. I sent this to Crower.

The period of time that the oil galley is exposed is not at high lift, but for a period of (.138-.023) .115 inches of lift. This is quite a bit, IMO. When I think about 16 lifters, the loss of oil pressure, and pumping all that oil out of the pan and into the valley, it scares me.