Posted By: polkat
Oiling mods on 440, front bearing? - 09/29/10 08:03 PM
When opening the passages from the main bearings to the oil gally, I noticed that the front main bearing doesn't have this passage. Anything to do there?
Oiling mods on 440, front bearing?
Posted By: JohnRR
Re: Oiling mods on 440, front bearing? - 09/29/10 08:07 PM
Yes it does, don't have a block in front of me to tell you exactly where though. .
Posted By: buildanother
Re: Oiling mods on 440, front bearing? - 09/29/10 08:29 PM
It runs on an angle right up to the front cam journal.
Posted By: thehemikid
Re: Oiling mods on 440, front bearing? - 09/29/10 08:37 PM
...like so.
Posted By: polkat
Re: Oiling mods on 440, front bearing? - 09/29/10 08:50 PM
Nice pic. As it shows, the passage splits off from the cam journal passage a little ways up from the main (my arrow in the pic below). This is easily accessable in mains 2 through 5.
BUT...then again, it looks like oil flows away from the main in number 1 instead of to the mains in the others. So maybe no mod is required here?
BUT...then again, it looks like oil flows away from the main in number 1 instead of to the mains in the others. So maybe no mod is required here?
Posted By: thehemikid
Re: Oiling mods on 440, front bearing? - 09/29/10 09:15 PM
Quote:
Nice pic. As it shows, the passage splits off from the cam journal passage a little ways up from the main (my arrow in the pic below). This is easily accessable in mains 2 through 5.
BUT...then again, it looks like oil flows away from the main in number 1 instead of to the mains in the others. So maybe no mod is required here?
...Pressure, but then again #4 has a problem with getting oil at higher RPM's.
Posted By: JohnRR
Re: Oiling mods on 440, front bearing? - 09/29/10 10:29 PM
Quote:
Nice pic. As it shows, the passage splits off from the cam journal passage a little ways up from the main (my arrow in the pic below). This is easily accessable in mains 2 through 5.
BUT...then again, it looks like oil flows away from the main in number 1 instead of to the mains in the others. So maybe no mod is required here?
That is just the way the picture is drawn , oil goes in 2 directions from the main galley that goes across the front of the block, the mod is to open passage that flows towards the main and to restrict the passage going to the cam.
Posted By: JohnRR
Re: Oiling mods on 440, front bearing? - 09/29/10 10:32 PM
Quote:Quote:
Nice pic. As it shows, the passage splits off from the cam journal passage a little ways up from the main (my arrow in the pic below). This is easily accessable in mains 2 through 5.
BUT...then again, it looks like oil flows away from the main in number 1 instead of to the mains in the others. So maybe no mod is required here?
...Pressure, but then again #4 has a problem with getting oil at higher RPM's.
That is true , there is a mod that can be done that will direct feed the head and you block off the passage from the cam , you have to add a restrictor to each head .
Posted By: thehemikid
Re: Oiling mods on 440, front bearing? - 09/29/10 10:43 PM
Quote:
When opening the passages from the main bearings to the oil gally, I noticed that the front main bearing doesn't have this passage. Anything to do there?
...How much hp & rpm are building for?
Posted By: polkat
Re: Oiling mods on 440, front bearing? - 09/29/10 10:52 PM
Not that much, maybe 6000rpm at 400+hp, but I've had bottom end oiling problems on B/RB mild builds before, particularly with oil starved rod bearings. I'd feel better if I could just get a bit more oil down there. I've already drilled the 2 thru 5 passages to the galley to 9/32's from the main saddles but got confused when I got to #1 and thought I'd ask.
Posted By: thehemikid
Re: Oiling mods on 440, front bearing? - 09/29/10 11:43 PM
...I'm going to ask a silly question now. Have you run a high volume pump & still had oiling problems?
Posted By: HPMike
Re: Oiling mods on 440, front bearing? - 09/30/10 12:54 AM
Quote:
Not that much, maybe 6000rpm at 400+hp, but I've had bottom end oiling problems on B/RB mild builds before, particularly with oil starved rod bearings. I'd feel better if I could just get a bit more oil down there. I've already drilled the 2 thru 5 passages to the galley to 9/32's from the main saddles but got confused when I got to #1 and thought I'd ask.
With all due respect....
If you had problems at that level, it had nothing to do with the block. I have built legions of B/RB's with way more power than that and have had no failures that you refer to. The bottom ends on these engines are particularly good, especially when compared to some of the other offerings from Detroit during the same time period.
MB
Posted By: feets
Re: Oiling mods on 440, front bearing? - 09/30/10 01:14 AM
I think a bottom end oiling mod is not necessary for a street engine.
I ran two separate oil lines from the sending unit to my turbochargers and didn't have ANY oil related issues spinning above 6000 rpm. I ran it like that for more than 10 years.
Run a decent high volume (NOT high pressure) pump and you'll be fine. Be sure your bearing clearances are where they should be.
I ran two separate oil lines from the sending unit to my turbochargers and didn't have ANY oil related issues spinning above 6000 rpm. I ran it like that for more than 10 years.
Run a decent high volume (NOT high pressure) pump and you'll be fine. Be sure your bearing clearances are where they should be.
Posted By: RapidRobert
Re: Oiling mods on 440, front bearing? - 09/30/10 02:59 AM
Quote:yes there is a prob w the oil velocity blowing past the #4 main & not being able to make the sharp turn & the 2 rods fed from that main losing their bearings from starvation. As you know on SOME builds it's been a prob. Several fixes, one is an oil bypass line in the valley to slow it down. Been away from BB's for a long time so I've lost track of em.(Got a 451 slowly coming together though
Not that much, maybe 6000rpm at 400+hp, but I've had bottom end oiling problems on B/RB mild builds before, particularly with oil starved rod bearings.
). Andyf would have some good info on this. You can drill each vertical crank to cam passage & screw in a setscrew drilled to 1/16" which is plenty of oil for the cam journals/bearings ex for the one that feeds the heads and to elim that one drill horizontally into the rear of each head then up at an angle to the rear pedestal & tap into the NPT plug at the top rear of the block & T off of it to feed both heads that way & restrict each head to ~.080". this will let you restrict all 5 cam bearing oil passages to 1/16" but the #1 concern is the #4 main which MAY not be a prob w your rpm but you're into it and it's at the point where this is the time to research/add it. Definitely finish checking/drilling the 5 gallery to crank angled passages.
Posted By: polkat
Re: Oiling mods on 440, front bearing? - 09/30/10 06:02 AM
RapidRobert said, "Definitely finish checking/drilling the 5 gallery to crank angled passages."
Which brings me back to my original question; I can't see the angled passage through the #1 main bearing hole, which immediately slants down at an angle toward the front of the block (with the block upside down). I've drilled the rest, but how do I drill that one?
Which brings me back to my original question; I can't see the angled passage through the #1 main bearing hole, which immediately slants down at an angle toward the front of the block (with the block upside down). I've drilled the rest, but how do I drill that one?
Posted By: BLACKHEMIRR
Re: Oiling mods on 440, front bearing? - 09/30/10 12:01 PM
The oil passage that goes between the #1 main brg and #1 cam brg intersects the passage that goes from the oil pump to the main oil galley. The intersection is about half way between the main brg and cam brg. You would probably only have to drill from the main brg up to the point where they intersect. I would think that the #1 main would have plenty of pressure as it is. Plus that passage only feeds one rod brg, not two like #'s 2,3,and 4.
Posted By: BigBlockMopar
Re: Oiling mods on 440, front bearing? - 09/30/10 12:13 PM
Quote:
... but I've had bottom end oiling problems on B/RB mild builds before, particularly with oil starved rod bearings.
You also used fully grooved mainbearings with a HV-oilpump back then?
Posted By: JohnRR
Re: Oiling mods on 440, front bearing? - 09/30/10 01:47 PM
Quote:
You can drill each vertical crank to cam passage & screw in a setscrew drilled to 1/16" which is plenty of oil for the cam journals/bearings
I did that to my first 383 build but drilled an 1/8" hole , now I just drill a new smaller hole in the cam bearing and install it with the new hole over the passage .