Which oil pump and timing chain?
Thread Starter
Staging Lane
Joined: Aug 2005
Posts: 98
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Which oil pump and timing chain? I want to put in a new oil pump for my heads and cam package. I have the motor apart and don't know what pump would be good for AFR 205 and cheatr cam package. I also would like to change the timing chain since I am in here. What do you folks recommend?
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
LS2 chain and no need for ported pump unless you are pushing over 7K rpm.
Too high a pressure is not good as most poeple think. That sucker will pump all the oil at high rpm and that can lead to bearing failures at high rpm.
The replacement LSx pumps are all revised LS6 pumps and more than adequate for the job.
Too high a pressure is not good as most poeple think. That sucker will pump all the oil at high rpm and that can lead to bearing failures at high rpm.
The replacement LSx pumps are all revised LS6 pumps and more than adequate for the job.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by black_z
A good rule of thumb for oil pressure is 10 PSI for every 1000 RPM's.
Originally Posted by PREDATOR-Z
LS2 chain and no need for ported pump unless you are pushing over 7K rpm.
Too high a pressure is not good as most poeple think. That sucker will pump all the oil at high rpm and that can lead to bearing failures at high rpm.
The replacement LSx pumps are all revised LS6 pumps and more than adequate for the job.
Too high a pressure is not good as most poeple think. That sucker will pump all the oil at high rpm and that can lead to bearing failures at high rpm.
The replacement LSx pumps are all revised LS6 pumps and more than adequate for the job.
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Originally Posted by PREDATOR-Z
That is also a misconception otherwise LS6 pump would pump 65 psi all the time at WOT which we know is not the case.
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Brett Foote TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Pumps are ported AND shimmed.
Ported increases flow and shimmed springs increase pressure.
too high a pressure takes away from the viscuous capabilities of the oil, but the worse part is with the stock oil pan design (capacity), ported pumps tend to suck all the oil out of the pan before it has a chance to return.
A combination of both can do more harm than good at high rpm.
Simply overkill. (Unless you get a higher capacity pan)
Ported increases flow and shimmed springs increase pressure.
too high a pressure takes away from the viscuous capabilities of the oil, but the worse part is with the stock oil pan design (capacity), ported pumps tend to suck all the oil out of the pan before it has a chance to return.
A combination of both can do more harm than good at high rpm.
Simply overkill. (Unless you get a higher capacity pan)
Thread Starter
Staging Lane
Joined: Aug 2005
Posts: 98
Likes: 0
Thanks Predator-z. I always seem to like your anwsers. I am sure that the QTP pump and JWIS chain are good peices, and am just concerned with what I should stuff in my car. I will run the stock 2002 oil pump and buy an ls2 chain from the local dealer. Should I install a 160 thermostat or just run the stocker.
Originally Posted by PREDATOR-Z
Pumps are ported AND shimmed.
Ported increases flow and shimmed springs increase pressure.
too high a pressure takes away from the viscuous capabilities of the oil, but the worse part is with the stock oil pan design (capacity), ported pumps tend to suck all the oil out of the pan before it has a chance to return.
A combination of both can do more harm than good at high rpm.
Simply overkill. (Unless you get a higher capacity pan)
Ported increases flow and shimmed springs increase pressure.
too high a pressure takes away from the viscuous capabilities of the oil, but the worse part is with the stock oil pan design (capacity), ported pumps tend to suck all the oil out of the pan before it has a chance to return.
A combination of both can do more harm than good at high rpm.
Simply overkill. (Unless you get a higher capacity pan)
Originally Posted by SatisTraction
so what do i ask for when i go to the dealer? if i say i need a ls6 oil pump and a ls2 chain he is going to ask for year, make, and model.
i know, i am NEWBIE
i know, i am NEWBIE
LS2 chain: GM# 12586482 (made in France)
I see no reason to port on stock/mild setup except to smooth the edges a little on the inlet and outlet. You'll see when you get the oil pump and take a look at it.
Hope this helps!
Originally Posted by PREDATOR-Z
but the worse part is with the stock oil pan design (capacity), ported pumps tend to suck all the oil out of the pan before it has a chance to return.
Teching In
Joined: Sep 2005
Posts: 35
Likes: 0
Originally Posted by black_z
A good rule of thumb for oil pressure is 10 PSI for every 1000 RPM's.
Teching In
Joined: Sep 2005
Posts: 35
Likes: 0
Originally Posted by PREDATOR-Z
but the worse part is with the stock oil pan design (capacity), ported pumps tend to suck all the oil out of the pan before it has a chance to return.
A combination of both can do more harm than good at high rpm.
Simply overkill. (Unless you get a higher capacity pan)
what he was trying to say is that a ported pump, becuase if its ability to move more oil faster, tends to pump oil fast enough to where the pick-up becomes un-submerged (not that the pan is sucked dry). you gotta have one freakin' mean pump to suck your pan dry...or one serious oil return issue!
Originally Posted by ryan-63nova
I think..or hope what he was trying to say is that a ported pump, becuase if its ability to move more oil faster, tends to pump oil fast enough to where the pick-up becomes un-submerged (not that the pan is sucked dry). you gotta have one freakin' mean pump to suck your pan dry...or one serious oil return issue!
what he was trying to say is that a ported pump, becuase if its ability to move more oil faster, tends to pump oil fast enough to where the pick-up becomes un-submerged (not that the pan is sucked dry). you gotta have one freakin' mean pump to suck your pan dry...or one serious oil return issue!Its not that I doubt that the oil pickup can be sucked dry, I just think its caused by volume as opposed to pressure. and also that the oil simply isnt draining back into the block fast enough.
Last edited by GuitsBoy; Sep 29, 2005 at 01:28 PM.