SB - Oil Mods
#360797
06/28/09 06:31 PM
06/28/09 06:31 PM
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Joined: Aug 2005
Posts: 637 Sao Paulo, Brazil
dart_73_br
OP
mopar
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OP
mopar
Joined: Aug 2005
Posts: 637
Sao Paulo, Brazil
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Hello guys,
I´m just trying to find information on oild mods. Found in some topis that there´s some information in the book "How to build big inch Mopar small blocks". There´s another book that you recommend on this issue ?!
I want to do that cross over tube in the valley like someones say here.
And just one more issue, Is this really necessary for a 7000rpm 600hp LA Block !?
BR<
1973 Brasilian Dart E100, boosted 390"
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Re: SB - Oil Mods
[Re: wheelsup68dart]
#360799
06/28/09 06:51 PM
06/28/09 06:51 PM
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Joined: Jan 2004
Posts: 13,247 Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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There is a fellow on here that go's by the screen name 40ford, he had a good post on Mopar Chat web site under the name Sanborn, very good read and I followed his suggestion's religiously and I have not had a issue,,,is it aboslutly necessary? as Lonnie said no it's not, but I did mine cause I wanted to.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: SB - Oil Mods
[Re: dartman366]
#360800
06/28/09 06:55 PM
06/28/09 06:55 PM
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Joined: Jan 2003
Posts: 4,616 Kissimmee Fl.
dusturbd340W5
master
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master
Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
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all depends on build I have bushed lifter bores and was told a crossover tube was a waste of time I did enlarge all oil passages to and from pump and main bearings and restricted oil to cam bearings since I run external oil lines to rockers.
70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake
best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4
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Re: SB - Oil Mods
[Re: dusturbd340W5]
#360801
06/28/09 09:33 PM
06/28/09 09:33 PM
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Joined: Jan 2003
Posts: 1,329 NC
DCM71cuda
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,329
NC
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good info from a reliable source:
In an A engine with a solid or roller lifter cam we highly recommend installing the Chrysler P4120603 lifter oil block off tube kit. Regardless of whether you use a hydraulic, solid or roller cam we recommend the following modifications.
Purchase an 8-10” long 9/32 drill bit. Remove the main caps and on mains number 1-2-3-4. There is an oil passage which goes from the top of the main saddle to the lifter galley on the passenger side of the block. Slowly drill these four passages to 9/32. Cast iron is very hard to drill without the bit trying to hang so do not try to rush this job. If you happen to break the bit you will have real problems.
Take your oil pump and drill the neck of the pump, the section between the rotor and the main cap, 1/2 inch. Take a sandpaper roll (the kind used in porting and polishing heads) and go in the pump above the rotors and debur and slick the area above the rotors. You will need to slick the hole in the pump neck that you have drilled. Drill to 1/2” the rear main cap where the oil goes through and polish with the sandpaper roll.
You will need a 10” long 1/2” drill bit for the next step. With the rear main cap removed, look in the hole where the oil goes into the block. There is a 9/16 freeze plug which diverts the oil through the oil filter. Remove this plug by inserting a 1/4” rod through the hole where the oil pressure gauge goes in the top side of the block. Drill the hole 1/2” up to the lifter galley where the plug was removed. Remove the oil filter and any adapter or plates from the block. Remove the pipe plug from the block that is under the filter. Drill to 1/2” both holes that go from the filter to the passage that feeds the lifter galley. Now remove the pipe plug in the rear of the block, behind the oil filter and drill this passage to the center of the oil filter bolt 1/2”. DO NOT DRILL THE PASSAGES FROM THE MAINS TO THE CAMSHAFT. DO NOT RESTRICT THE OIL TO THE ROCKER ARMS.
Once all passages are drilled, completely clean the block very thoroughly. We use a Milodon #34010 Brush Kit to clean all the oil passages, and it works very well. Once the block is completely clean, replace the 9/16 plug that diverts the oil to the filter and the plug under the oil filter. If you make the above modifications you have greatly increased the volume of oil that feeds the crankshaft and the bearings of your A engine.
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Re: SB - Oil Mods
[Re: solidcam]
#360804
06/28/09 10:22 PM
06/28/09 10:22 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I did the cross over on one, cant really say it helped much... but the biggest thing is to drill the ports to 1/2" like said above... I turn my engines up to at least 8000 and more... I did have 1 engine failure but it broke a rod(stock type rod) and it wasnt a oil failure... at 7000 rpm you dont need to do much EDIT and drilling the mains with the 9/32
Last edited by MR_P_BODY; 06/28/09 10:29 PM.
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