Re: Oiling mods on 440, front bearing?
[Re: polkat]
#817549
09/29/10 06:29 PM
09/29/10 06:29 PM
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JohnRR
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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.
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Re: Oiling mods on 440, front bearing?
[Re: thehemikid]
#817550
09/29/10 06:32 PM
09/29/10 06:32 PM
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JohnRR
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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 .
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Re: Oiling mods on 440, front bearing?
[Re: polkat]
#817551
09/29/10 06:43 PM
09/29/10 06:43 PM
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Joined: Sep 2009
Posts: 1,805
ky hills
thehemikid
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ky hills
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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?
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Re: Oiling mods on 440, front bearing?
[Re: polkat]
#817554
09/29/10 08:54 PM
09/29/10 08:54 PM
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Joined: May 2005
Posts: 6,446
NJ-USA
HPMike
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master
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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
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Re: Oiling mods on 440, front bearing?
[Re: HPMike]
#817555
09/29/10 09:14 PM
09/29/10 09:14 PM
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Posts: 28,067
Irving, TX
feets
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Senior Management
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Irving, TX
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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.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Oiling mods on 440, front bearing?
[Re: HPMike]
#817559
09/30/10 08:13 AM
09/30/10 08:13 AM
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The Netherlands
BigBlockMopar
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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?
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Re: Oiling mods on 440, front bearing?
[Re: RapidRobert]
#817560
09/30/10 09:47 AM
09/30/10 09:47 AM
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JohnRR
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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 .
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). 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.
