I decided to add the windage tray after seeing your pics. Otherwise we have the same parts. I'm not spinning my 440 as high as you are,only to 6500.I think it all will work very well.

How consistent is your oil pressure, especially coming down from speed? That's a big reason why I focused on improving drainback to the pan, even w/ that simple OEM-type Street Hemi replica.

Yep. It's basically an experiment based on stuff I saw that supposedly worked w/ other applications.

One advantage I have on the dyno is that I have a flow gauge for the oil pump as well as a sight gauge on the oil tank. I can also change the gear ratio on the oil pump in 5 minutes and watch what happens. Even with all of that it is still a little hard to figure out what the engine really wants.

Are your lifter bores bushed? From what I can see, that is probably the biggest improvement that can be made in a BB Mopar engine. Bushing the lifter bores gets rid of a lot oil flow which means more oil in the pan and less windage.

If the lifter bores are not bushed then you're just spraying the oil around with 16 leaks and trying to control all of the windage.

This block, the 4.380" 440 being freshened up for the 3rd(?) time, has bushed lifter bores. My newly machined 4.375" bore 440 block does not, although that is something else I had considered doing to it.

If I remember rite, been awhile ,Chrysler did a oil test in the 60s with the hemi. They found that at 7000 rpm 5 quarts of oil was still up in the engine and 1 was in the pan. The reason for the 10 quart pans with swinging pickups, it was hard to make that engine live above 6500 with just the single pickup tube in the block. My thinking would be to address drain back in the engine along with the pan. The pan system you have made up is going in the right direction for oil control in short duration blasts. But one of the main benefits of oil is for coolant of parts in the engine, especially valve springs, so the oil splashing around is needed on long hauls to the track or street crusing, so maybe the improvements you have done would be good for drag racing but not so good for street, just my opinion,

Since the addition of the scraper,the oil pressure is rock steady.I haven't run the engine yet using the scraper and the windage tray,but the engine looked great when I pulled it down.I tore it down to install new pistons to increase the compression.

Thanks for posting. Always interesting to hear what others are doing.

I've never had a oil pressure loss problem but I'm not decelerating as hard either. Bearings look perfect when I took it apart.

I have the MP hemi pan, 1/2" pickup and std volume pump ported pretty well.

I use the std Milidon tray (fit fine even with my stroker crank) I-J custom scrapper made from my home made template and then hand fit every crank/scraper clearance point. Added some additional drain back, but not nearly to the extent that you did. Use 5-30 synthetic oil.

My biggest concern is the Eddy head drain back holes. I radiused the holes and ground the block to match the drain back holes in the head for better drain back. But I still don't think it is enough. I have full time oiling to the rocker shafts.

First off, great thread. I really appreciate when someone goes into detail with pics on their projects. Ok, simple question, hopefully simple answer.

If you did the exact same mods with a 4 quart pan and used the scraper, would you see any meaningful different on the dyno ? assuming a 500 hp engine.

Andy,what does a performance big block actually flow? I know my pump will move over 20 GPM,the filter will handle 29 GPM,but what does one actually flow?

Holy Crap! This thread is almost 5 years old! And my junk STILL ain't back together...

I don't know if anything I did as covered above would show up much on the dyno, other than maybe "something" from the crank scraper & windage tray. My concern was primarily oil control, since I'm working with an archaic oil system design.

Not sure I'd even bother w/ a 4-quart pan, either. The RPM at which any improvements are likely to show up would be beyond the range which I'd feel comfortable spinning with that small of a pan.

Good point. I'd be interesting to see how much and where on the rpm scale any gains would show up. All the work you did, it'd have to be worth something !