Oil pump - high volume or no?
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Supreme Member
Joined: Mar 2002
Posts: 1,176
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From: Springfield, MO
Car: 92 T/A VERT
Engine: LB9
Transmission: AUTO
Axle/Gears: 7.5 / 3.42's
Oil pump - high volume or no?
I'm rebuilding a 350 for the 92 car and am curious if I should get the high volume oil pump that comes with the federal mogul rebuild kit or specify that I want just the standard oil pump. The engine will be a mild one with tight clearances (lpe 211/219 cam, pro topline 180's and tpi)
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Joined: Jun 2001
Posts: 9,550
Likes: 4
From: Charleston, SC
Car: 91 Camaro Vert
Engine: 02 LS1, HX40
Transmission: 2002 LS1 M6
get the standard pump
theres no need to try to pump extra oil in there.. athough if you did, you would have to have better then normal drainback.
it would also put uneeded stress on your distrib(and in turn the cam and timing chain)
you dont need it for this motor, it wont help anything, and you would be putting uneeded stress on the distrib.. just get the standard pump with the standard pressure spring...
theres no need to try to pump extra oil in there.. athough if you did, you would have to have better then normal drainback.
it would also put uneeded stress on your distrib(and in turn the cam and timing chain)
you dont need it for this motor, it wont help anything, and you would be putting uneeded stress on the distrib.. just get the standard pump with the standard pressure spring...
Originally posted by ede
use melling m55 with the mr gasket #26 spring and weld a brace from to the pick up and bolt it to the pump body
use melling m55 with the mr gasket #26 spring and weld a brace from to the pick up and bolt it to the pump body
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Joined: Apr 2002
Posts: 1,353
Likes: 3
From: Austin
Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
I did exactly as Ede mentioned (M55 pump ands a #26 spring).
At idle with a hot eng, I have 25 psi.
Cruising thru town, I have abt 45 psi.
At highway speed I have 60 psi.
BTW, that Mr Gasket spring is rated at 60 PSI.
FWIW, Lingenfelter recommends this set-up for all SBC street engs.
At idle with a hot eng, I have 25 psi.
Cruising thru town, I have abt 45 psi.
At highway speed I have 60 psi.
BTW, that Mr Gasket spring is rated at 60 PSI.
FWIW, Lingenfelter recommends this set-up for all SBC street engs.
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Joined: May 2002
Posts: 432
Likes: 0
From: SE Pennsylvania
Car: 1986 Trans Am
Engine: 350 W/Plenty of Mods
Transmission: T5
Since the Mr. Gasget spring is rated to 60 PSI, have you ever noticed your pressure go above 60 when racing or really tearin around town? Also, what do you mean by welding a brace from the pickup and bolting it to the pump body? What exactly does that do, and how do you know where to get it welded to? I'm going to be rebuilding my SBC which should be pushing about 420-430 HP, so do you think the M55 with the High Pressure spring would still be a good route to take?? Atleast it isn't an expensive setup.
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Joined: Apr 2002
Posts: 1,353
Likes: 3
From: Austin
Car: 82 Z-28
Engine: 383 TPI
Transmission: 700R4
With a cold eng, the oil press is over 60 PSI., but I also have my oil filter bypass valve plugged off, so that may make it a little higher than normal.
Once the oil temp comes up, the spring regulates the oil press to ~60 psi up to at least 5K rpm (haven't been past 5K yet).
The oil pick-up tube (strainer) is a pressed fit into the pump, and they occasionally fall out. The brace mentioned before, keeps the pick-up tube from falling out (or twisting) of the oil pump and starving the eng for oil. I brazed my pick-up tube straight to the pump.
To find exactly where to weld the pick-up tube:
Install the pick-up tube. With eng upside-down, place some modeling clay on the pick-up tube, and install the oil pan. Remove the oil pan. The clay will have been squeezed between the oil pan and the pick-up tube. Keep adjusting the tube till you have 3/8" clearance, then weld/braze it.
IMHO, this set-up will be fine for your engine.
Once the oil temp comes up, the spring regulates the oil press to ~60 psi up to at least 5K rpm (haven't been past 5K yet).
The oil pick-up tube (strainer) is a pressed fit into the pump, and they occasionally fall out. The brace mentioned before, keeps the pick-up tube from falling out (or twisting) of the oil pump and starving the eng for oil. I brazed my pick-up tube straight to the pump.
To find exactly where to weld the pick-up tube:
Install the pick-up tube. With eng upside-down, place some modeling clay on the pick-up tube, and install the oil pan. Remove the oil pan. The clay will have been squeezed between the oil pan and the pick-up tube. Keep adjusting the tube till you have 3/8" clearance, then weld/braze it.
IMHO, this set-up will be fine for your engine.
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