Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: Charger446]
#2439092
01/22/18 05:07 PM
01/22/18 05:07 PM
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Joined: Feb 2003
Posts: 10,178 Someplace you aren't
SomeCarGuy
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I Live Here
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Posts: 10,178
Someplace you aren't
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Your Moroso pickup probably has just 1/2 threads and a 3/8 tube anyway. I’d get the 1/2 pickup though. Also look into if the turn has been opened up in the block. Should be pics or diagrams on the interwebs on that.
I want my fair share
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: Charger446]
#2439112
01/22/18 05:48 PM
01/22/18 05:48 PM
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Joined: Jan 2003
Posts: 21,050 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,050
Niles , Ohio
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3/8 was standard.Imade my 440 1/2.But there were other mods needed to utilise all the advantages.I had the things here but lost them over the years.Rocky
Chrysler Firepower
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: rumblebee4232]
#2439514
01/23/18 01:26 PM
01/23/18 01:26 PM
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Joined: Jan 2003
Posts: 74,907 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,907
U.S.S.A.
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I don't think I have ever seen a 3/8 pickup, I would find a 1/2.. There is, the 440-4 and 440-6 in 70 and 71 used the hemi pan and had a 3/8" pickup. The pickup tube was available , now ? I used a moroso 1/2" pickup threaded end, its a separate part welded to the tube, to neck down to the 3/8 pickup tube for the original A body 383 pan, the block had already been drilled when I was building it for a different application.
running up my post count some more .
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: Cab_Burge]
#2439548
01/23/18 02:19 PM
01/23/18 02:19 PM
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Joined: Jan 2003
Posts: 25,618 Rio Linda, CA
John_Kunkel
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Too Many Posts
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Rio Linda, CA
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The bypass spring in the pump determines how much oil goes into the pump and block, not the internal size of the oil pick up Have to disagree, the suction side of the system is the critical limiting factor. Even with the bypass fully closed, if you can't get it to the pump the volume output will suffer.
The INTERNET, the MISinformation superhighway
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: Charger446]
#2439783
01/23/18 11:09 PM
01/23/18 11:09 PM
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Joined: Jul 2011
Posts: 953 Chicago
PurpleBeeper
super stock
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super stock
Joined: Jul 2011
Posts: 953
Chicago
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I'm wrestling with this same question on a "street only" 440 I'm starting to build.... Is the 1/2" pickup necessary?
One thing I did find out (the hard way) is to match the pan with the pickup (same manufacturer). I put on a "hemi/six pack" Milodon pan & my 70/71 Hemi pickup tube (1/2") didn't fit. I had to buy a Milodon 1/2" pickup.
Also, fyi, I still have that 70/71 Hemi pickup in one of my boxes of parts.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: John_Kunkel]
#2439831
01/24/18 01:07 AM
01/24/18 01:07 AM
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Joined: Feb 2003
Posts: 10,178 Someplace you aren't
SomeCarGuy
I Live Here
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I Live Here
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Posts: 10,178
Someplace you aren't
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The bypass spring in the pump determines how much oil goes into the pump and block, not the internal size of the oil pick up Have to disagree, the suction side of the system is the critical limiting factor. Even with the bypass fully closed, if you can't get it to the pump the volume output will suffer. Plus Mopar didn’t use 1/2 for no reason. The outer limit of a 3/8 might be beyond nascar needs, which wouldn’t apply to many doing this, but they did it nonetheless.
I want my fair share
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: SomeCarGuy]
#2439872
01/24/18 02:49 AM
01/24/18 02:49 AM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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I run real loose (.0035+)bearing and lifter clearances(.002+) on all of my street and strip builds with 5W20 Wt. oil now with the high volume oil pumps with 65 Lb. + pressure at or above 2300 RPM with hot oil No bearing or other oiling issues using the stock type 3/8 oil pickups with 1/8 inch or less pick up clearances to the bottom of the oil pan by checking that clearance through the drain plugs on the last 12 motors I use to use 1/2 inch pickups with 50Wt racing oil I have ruin several stock blocks while modding them for the larger 1/2 thread sizes and had to block the stock oil passage off in the blocks under the oil pump and use a Milidon swinging external oil system No more
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: John_Kunkel]
#2440192
01/24/18 07:30 PM
01/24/18 07:30 PM
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Joined: Jun 2008
Posts: 3,913 usa
lewtot184
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master
Joined: Jun 2008
Posts: 3,913
usa
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The bypass spring in the pump determines how much oil goes into the pump and block, not the internal size of the oil pick up Have to disagree, the suction side of the system is the critical limiting factor. Even with the bypass fully closed, if you can't get it to the pump the volume output will suffer. right again john.
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: Cab_Burge]
#2440225
01/24/18 09:08 PM
01/24/18 09:08 PM
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Joined: Jan 2003
Posts: 25,618 Rio Linda, CA
John_Kunkel
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Too Many Posts
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I have ruin several stock blocks while modding them for the larger 1/2 thread sizes I never have, so is your anecdotal experience more valid than mine?
The INTERNET, the MISinformation superhighway
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: Charger446]
#2440384
01/25/18 03:12 AM
01/25/18 03:12 AM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: Cab_Burge]
#2440745
01/25/18 10:06 PM
01/25/18 10:06 PM
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Joined: Jan 2003
Posts: 25,618 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
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Posts: 25,618
Rio Linda, CA
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Are you a machinest? I'm not If you can't eyeball the edge distance of the existing hole and tell if it's a candidate for increasing the bore... All my blocks are drilled with a hand-held drill and the correct tap, even the mundane daily driver blocks. I drill 'em all the way to the intersection and then use a rotary burr to smooth out the sharp corner. (easier with the larger hole) I figure I gotta get a new pickup anyway and the 1/2" price isn't that bad when included in a complete overhaul.
The INTERNET, the MISinformation superhighway
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: John_Kunkel]
#2441251
01/26/18 11:16 PM
01/26/18 11:16 PM
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Joined: Feb 2003
Posts: 8,020 Pangaea
B5 Bee
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master
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Pangaea
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Are you a machinest? I'm not If you can't eyeball the edge distance of the existing hole and tell if it's a candidate for increasing the bore... All my blocks are drilled with a hand-held drill and the correct tap, even the mundane daily driver blocks. I drill 'em all the way to the intersection and then use a rotary burr to smooth out the sharp corner. (easier with the larger hole) I figure I gotta get a new pickup anyway and the 1/2" price isn't that bad when included in a complete overhaul. I do it the same way, except I first use a die grinder to remove the threads 180* opposite the thin side. This moves the drill center point over, leaving more material at the thin area and reducing the chance of cracking. Another advantage with 1/2", it takes less power to turn the pump.
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: cudaman1969]
#2441428
01/27/18 12:09 PM
01/27/18 12:09 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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I made a new one up for the 340 from the 3.0 Mitsubishi engine (a full 1" ) attached off the cover into the rear sump Magnum pan. Has that nice bell on the bottom too. Mike would you have a pic (or a part # to search for a pic)? EDIT found one on eBay, that would be a nice piece & an easy mod especially if you have a rear sump pan.
Last edited by RapidRobert; 01/27/18 12:16 PM.
live every 24 hour block of time like it's your last day on earth
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: RapidRobert]
#2441565
01/27/18 04:25 PM
01/27/18 04:25 PM
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Joined: Jan 2004
Posts: 8,193 fredericksburg,va
cudaman1969
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master
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fredericksburg,va
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I made a new one up for the 340 from the 3.0 Mitsubishi engine (a full 1" ) attached off the cover into the rear sump Magnum pan. Has that nice bell on the bottom too. Mike would you have a pic (or a part # to search for a pic)? EDIT found one on eBay, that would be a nice piece & an easy mod especially if you have a rear sump pan. I had to section, shorten, then tig it back to get it in the right direction, like making a header. If you still need a pic i'll send you a pm to show how it came out.
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Re: 3/8 vs 1/2 inch oil pickup. Do I even need 1/2?
[Re: B5 Bee]
#2441701
01/27/18 08:38 PM
01/27/18 08:38 PM
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Joined: Jan 2003
Posts: 25,618 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,618
Rio Linda, CA
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I do it the same way, except I first use a die grinder to remove the threads 180* opposite the thin side. This moves the drill center point over, leaving more material at the thin area and reducing the chance of cracking.
When I've tried moving the hole outboard the pickup pipe hits the pan side wall....have to dimple it. Might depend on who makes the pan.
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