3/8 or1/2 oil pickup tube big block 6500 rpm street ???
#311809
05/08/09 03:37 PM
05/08/09 03:37 PM
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Joined: May 2005
Posts: 180
merrill, wisconsin
voigtspeed
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merrill, wisconsin
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Looking for some opinions on the nesesity of changing to a 1/2 pickup. aprox 550 horse stock apearing b engine 6500 rpm max would like to keep the stock pan look. not to mention ground clearance i now have the stock baffeled hp pan, pickup. Thought of building a 1/2 pickup to fit pan not shure if it will empty the stock pan.
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Re: 3/8 or1/2 oil pickup tube big block 6500 rpm street ???
[Re: voigtspeed]
#311812
05/08/09 04:50 PM
05/08/09 04:50 PM
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Joined: Feb 2007
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organ
maximum entropy
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organ
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i had a 1/2 pickup and ended up breaking the boss in the block (stroker). i had to go to an external pickup. i've heard the milodon 3/8 pickups are as big or nearly as big as the 1/2". that's what i'm putting in my latest build.
for what is the good life if not doing things thoughtfully?
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Re: 3/8 or1/2 oil pickup tube big block 6500 rpm street ???
[Re: cudarex]
#311813
05/08/09 04:57 PM
05/08/09 04:57 PM
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Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
blownzoom440
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Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
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Quote:
Wouldn't go to a 1/2" pu with a stock pan. Will suck it dry.
wouldnt that say you need a bigger pan?no matter the size pickup your barings/clearances only allow so much oil to go by.  ?
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Re: 3/8 or1/2 oil pickup tube big block 6500 rpm street ???
[Re: blownzoom440]
#311814
05/08/09 05:43 PM
05/08/09 05:43 PM
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Joined: May 2005
Posts: 180
merrill, wisconsin
voigtspeed
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Clearances are .002-.0025 rod side clearance also within stock specs. would like to keep the stock pan sleeper look. most engines that i have built whith this power or more i went 1/2 inch pickup but i have built 400 horse 5500 rpm motors with stock pickup and no issues actualy i have never had a bearing failure in a big block just want to get some opinions to feel safe car will no doubt get ran hard. thanks again 
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Re: 3/8 or1/2 oil pickup tube big block 6500 rpm street ???
[Re: Steve1118]
#311816
05/08/09 06:04 PM
05/08/09 06:04 PM
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Joined: Jul 2008
Posts: 30,490
Florida STAYcation
dOc …
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,490
Florida STAYcation
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Quote:
You will be fine with a 3/8 pickup.
 x 2 ..... UNLESS you plan on running 6500 non-stop and for extended periods of time.
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Re: 3/8 or1/2 oil pickup tube big block 6500 rpm street ???
[Re: dOc …]
#311817
05/08/09 07:03 PM
05/08/09 07:03 PM
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Anonymous
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Anonymous
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3/8 and you will have no problems based on all the thrashing I have done on BB's ( I have melted enough slicks to start my personal off shore reef )and have never ever had any trouble--the 1/2 in mod is not done right by most shops--you have to tap that hole pretty deep--if you don't the 1/2 in pick up will only go in a few threads and that IS trouble--You always take a chance of cracking the block and making a mess--just run a std pipe and let it rip--Good luck! 
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Re: 3/8 or1/2 oil pickup tube big block 6500 rpm street ???
[Re: voigtspeed]
#311819
05/08/09 11:55 PM
05/08/09 11:55 PM
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Joined: Aug 2003
Posts: 43,305
Bend,OR USA
Cab_Burge
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I Win
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Bend,OR USA
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Quote:
Looking for some opinions on the nesesity of changing to a 1/2 pickup. aprox 550 horse stock apearing b engine 6500 rpm max would like to keep the stock pan look. not to mention ground clearance i now have the stock baffeled hp pan, pickup. Thought of building a 1/2 pickup to fit pan not shure if it will empty the stock pan.
I have built many motors with both size pick ups, I prefer using the 3/8 in the blocks that came with them instad of machining and tapping for the 1/2. My 518 C.I. low deck stroker in my street/strip Duster uses a stock Mopar 1970-71 street Hemi/6 pak oil pan and the stock Mopar 440 six pak 3/8 pick up  I shift the motor at or above 7000 rpm at the track, over three hundred runs with that system so far and no evidence of oil starvation so far. I oil the Harland Sharp roller rockers full time and the bearing clearances are loose, .003+ on both rods and mains. I also use real thin oil, 5W20WT so maybe it runs back into the pan faster than the thicker oils will  I do use the stock windage tray and a custom made cranksahft oil scraper also
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 3/8 or1/2 oil pickup tube big block 6500 rpm street ???
[Re: Cab_Burge]
#311820
05/09/09 07:50 AM
05/09/09 07:50 AM
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Joined: Jan 2003
Posts: 6,531
Jacksonville, FL
Chris2581
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Jacksonville, FL
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3/8ths will be just fine.We've never used the 1/2 inch pickup,and have never had bearing problems.
Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
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Re: 3/8 or1/2 oil pickup tube big block 6500 rpm street ???
[Re: voigtspeed]
#311821
05/09/09 08:41 AM
05/09/09 08:41 AM
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Joined: Jan 2003
Posts: 16,932
NC
440Jim
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I Live Here
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NC
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Quote:
Looking for some opinions on the nesesity of changing to a 1/2 pickup. aprox 550 horse stock apearing b engine 6500 rpm max
Although I like the 1/2 NPT mod done correctly, you should be fine with a 3/8" NPT pickup in your application. That being said, there are a lot of other things in the oiling system than just the pickup: the pan and baffles, oil capacity, drain back, pump volume, oil passage mod, rocker oiling, windage tray, etc. are just some.
As mentioned, using a 3/8" thread welded to a larger tube to the pickup point gets some benefit without modifying the block. a.k.a. Milodon
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Re: 3/8 or1/2 oil pickup tube big block 6500 rpm street ???
[Re: 440Jim]
#311822
05/09/09 09:07 AM
05/09/09 09:07 AM
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Joined: May 2005
Posts: 180
merrill, wisconsin
voigtspeed
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merrill, wisconsin
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Thanks for all the input i thought 3/8 would do the job just looking for a little reashurance i guess sometimes its hard to draw the line. Thanks much moparts!!
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