Big Block Oiling Mods?
#2544923
09/03/18 02:55 AM
09/03/18 02:55 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
OP
master
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OP
master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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I know it has been posted before, but could not find it in the search?
What block modifications are needed for 600-650 HP, 6,000-6,500 RPM? Street/Strip 440 to 505" stroker. Trick Flow 240 heads, 10.0:1 compression, small solid roller cam (243/249@0.050", 0.617"/0.624" lift.)
Would this be OK with 3/8" oil pickup, or just go with 1/2" pickup. Ream main oil feed holes to 17/64"? anything else?
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Re: Big Block Oiling Mods?
[Re: 451Mopar]
#2544935
09/03/18 04:04 AM
09/03/18 04:04 AM
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Joined: Aug 2003
Posts: 43,195 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,195
Bend,OR USA
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I use the Seal Power truck narrow full groove main bearings, either part # M4500 or 4500M part number for RB motors, and I do groove the #4 cam journal on all my solid roller cam motors to lube the rocker arms full time for cooling the valve springs, I use a .039 to .053 oil resrictors in the head or block, your choice, also to not flood the top end I shoot for between .0030 to .0040 main bearing oil clearances and between .0025 to .0030 on the rod bearings clearances, way better a little loose than a tiny bit to tight on BB Mopar bearings As far as any other mechanical oil mods to the block I thoroughly remove all the casting flashes inside and out I don't recommend changing the oil tube size from 3/8 NPT to 1/2 NPT I always use the high volume oil pumps with as big as a oil pan that I can run safely on that body for all my BB engine builds, even mild ones What year and type body is this motor going into?
Last edited by Cab_Burge; 09/03/18 04:09 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Big Block Oiling Mods?
[Re: 451Mopar]
#2544945
09/03/18 06:01 AM
09/03/18 06:01 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I think Hughes has some mods on their site & you might Google it. If you go to www.moparchat.com then scroll down to & click on "circle track chat" there is an oiling sticky at the top of the page: "Sanborns oiling mods". it is SB orientated but alot bleeds over. it'll take you several hours to absorb it all but it is worth it. this was my last one. (screen added later) EDIT & I reduced the protrusion
Last edited by RapidRobert; 09/03/18 07:08 AM.
live every 24 hour block of time like it's your last day on earth
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Re: Big Block Oiling Mods?
[Re: 451Mopar]
#2544966
09/03/18 10:19 AM
09/03/18 10:19 AM
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Joined: Feb 2005
Posts: 4,314 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,314
Prospect, PA
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What is needed - Probably nothing, IMO.
That said, I cannot leave it alone. I massage the inside radius of first right angle encountered in the block on the suction side. Clean, radius an enlarge everything in the pump including the oil filter fitting. I've posted before the significant misalignment in the Melling pumps between the pump body and pump cover on several pumps. Probably a 25-30% crossection reduction due to the misalignment between the two pump halves. Hopefully they fixed it, but you should check.
Then radius and enlarge the the pump and block pressure side transition.
If the hemi pan fits, use it with either pickup you want. I use 1/2", May not in the future. Slight mod of the 1/2" and it worked fine. Full length, std stroke Milidon standard stroke windage tray, inexpensive girdle, scraper, and it all tucks up real nice.
I use a standard volume pump, full time unrestricted rocker oiling, with 0.003/0.0025" bearing clearances and have good oil pressure.
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Re: Big Block Oiling Mods?
[Re: BSB67]
#2545159
09/03/18 03:54 PM
09/03/18 03:54 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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What is needed - Probably nothing, IMO. That said, I cannot leave it alone. that's the story of my life!
live every 24 hour block of time like it's your last day on earth
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Re: Big Block Oiling Mods?
[Re: 451Mopar]
#2569627
10/26/18 03:28 AM
10/26/18 03:28 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
OP
master
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OP
master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Got around to working on the block oiling. Opened the 1,2,3,5 main feeds to 17/64", and #4 to 9/32" These are the sizes suggested from Chuck Senatores' book.
Andy Finkbeiner suggests 1,2,3,5 be 9/32", and #4 be 5/16". I don't think I need to go that large?
I did open up and tap the oil pickup boss for 1/2" oil pickup.
I also made sure the pressure side from pump to cross and main lifter galley were 9/16".
All other feeds to cam bearings and head/rocker gear are 1/4".
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