3/8" to 1/2" OIL PICK-UP TUBE...AND BLOCK MOD?

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Thanks for that info,Mike! I definately don't want to crack the block....and have to spend MORE money on an external set-up! This project is already setting me back a pretty penny!

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I hear ya.... stop on by.... I have a few Blues for ya... LOL

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JMO Randy.... nope... you arent spinning high enough
and its too easy to crack out(it gets real thin in
the boss area)and if you do crack it out... then its
a external pick up.......... again... JMO

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Been there done that, external pickups can be a real pain I shift my 518 motor at or above 7000 RPM on every run, stock Mopar 440 6 pak 3/8 pickup and 6 quart oil pan

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If by "block mod" you mean smoothing out the hard 90 degree turn the oil makes right after entering the block, I would say definitely do that. It is a 10 minute deal and costs nothing if you already have the tools.

I don't think increasing the oil pickup to 1/2 is necessary, but it does not do any harm unless the procedure is messed up. At that point it does a whole bunch of harm I would never do it to one that looked thin to begin with. So if there are any second thoughts, don't do it

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Yes X2 with Rich...leave it at 3/8" NPT but, using the 1/2" pipe tube. And get in the block with a carbide and radius the intersecting passages. I'd also ream the oil passages to the mains...I think it's a 17/64"

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I don't really understand why it is necessary to begin with. Fluid can only flow as much as the smallest bottleneck. So rather you have a 20oz pepsi, or a 2qt pepsi bottle, it's gonna flow out the end of the bottle at the same rate. Maybe someone will correct me if I am wrong about my theory.

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This is on the suction side... you ALWAYS try to
have a larger inlet to your pump... REMEMBER...
pumps dont suck... its still atmospheric pressure
pushing the oil in.. all the pump does is create the
negative pressure zone so the oil can get pushed in....
no difference than the intake and pistons(piston creates
the negative so atmospheric pressure can push in
the air/fuel

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Thanks guys! Gus..what do you suggest doing with the dremmel? I didn't notice any casting flash on my Melling HV63 pump! Should something on the pump be opened-up? Thanks! Randy

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I dont know if your pump has it Randy but where the
2 holes intersect on the bottom (below the rotor)
there if usually a bad corner which can be radiused
for better flow

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Thanks guys! Gus..what do you suggest doing with the dremmel? I didn't notice any casting flash on my Melling HV63 pump! Should something on the pump be opened-up? Thanks! Randy

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If by "block mod" you mean smoothing out the hard 90 degree turn the oil makes right after entering the block, I would say definitely do that. It is a 10 minute deal and costs nothing if you already have the tools.

I don't think increasing the oil pickup to 1/2 is necessary, but it does not do any harm unless the procedure is messed up. At that point it does a whole bunch of harm I would never do it to one that looked thin to begin with. So if there are any second thoughts, don't do it

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1) Smooth the turn/intersection
2) Using a milling machine to do the 1/2 NPT is safer/better than by hand. It allows moving the centerline ~0.050" to keep more meat on the boss.
3) You can use a pickup with the 3/8 NPT thread welded to a larger tube for some of the 1/2 NPT benefit without enlarging the block boss.

FWIW, all my big blocks have the 1/2 NPT mod and the enlarged oil passages to the mains.