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#1
04-07-2016, 10:38 PM
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301 factory oil pump
Does anybody know if the oil pumps that were used in 301 engines were reduced capacity than the standard v8 pump? Thanks Todd
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#2
04-08-2016, 06:39 AM
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Don't know about the originals but replacement wise they can use a low performance 2 bbl 40 psi 5/8" pick up tube model , or the increased volume 60 psi 3/4" pick up tube model.
The 60 psi will be all you should need so if your concidering the 80 psi SD 455 pump forget it!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
04-08-2016, 10:10 AM
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Steve,
If my mind reading skills are working...  Todd might be looking for a way to reduce parasitic power loss in his stocker engine.I remember reading that Scott Burton made some modification to his oil pump in his B stocker. Seemed like his cut down the pump gears and housing? I'm not sure. I'll be asking him about that, next time I see him at a race...
__________________
1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#4
04-08-2016, 03:28 PM
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I was thinking of modified a 45psi pump by boring the 5/8 inlet to the std 3/4 inlet (pickup) I talk to some one that runs a std 45psi 5/8 inlet in his car he told me he runs 40psi all the time throw the 1/4mile run. (He runs the5/8 pickup) ???? A small inlet scares me??
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#5
04-09-2016, 07:12 AM
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Well the 301 does not have the amount of bearing surface crank wise that all the post 1958 motors do so in theory they need less volume and a 5/8" pick up system might cut it, but dependant on how high you buzz it to I would still want to see 8 psi per every 1K rpm!
I would sooner have 15 psi too much and run a 5w20 oil to get the friction level down!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#6
04-09-2016, 10:02 PM
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Often the 60 lbs pumps come with an extra spring to lower the pressure.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#7
04-09-2016, 10:02 PM
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The factory 301's still use a 3 inch main bearing. The rods I think are 2 inch. Depending on rpm you still have to overcome the centrifugal forces to get the oil into the main journal drilled passages to the rod journals. But the 301 is not a buzzer so, keeping it around 5000 RPM may warrant the 45 psi pump?
Mark
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My Gasser '63 Catalina build. Oh sorry, it's a Street freak. Either way it's a fun build. |
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#8
04-14-2016, 12:41 PM
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Larry Stewart used to modify the stock Melling pumps. He would reduce the height of the oil pump gears and replace them with a brass spacer. He also used to cut grooves into the side of the housing wall to help with cavitation. I have one of his modified pumps on the shelf. Could not see where it gained me any HP on the dyno when I tested it. May work for a small displacement higher revving engine. Mine was a 455 application.
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#9
04-14-2016, 04:09 PM
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Any chance of posting pictures of the pump
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#10
04-14-2016, 06:19 PM
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I will dig it out and try to get some pics of it.
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#11
04-14-2016, 06:38 PM
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Thank you Scott. I would love to see the modifications
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#12
04-14-2016, 07:48 PM
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#13
04-17-2016, 07:49 AM
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Want to sell it Scott? Thanks for all the replies guys.
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#14
04-17-2016, 08:47 AM
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I do not want to sell, might come in handy one of these days.
Larry Stewart still might make them I am not sure. If you want me to measure any thing on it let me know. I good machinist should be able to do the mods easily I would think to a standard Melling pump. |
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