Porting your own oil pump
Porting your own oil pump Is it possible to port your stock oil pump? I read that the ls1 pump is the same as the ls6 pump, so would there be any problems doing the port work myself?
The only gain is higher flow. In stock form the pump is adequate, it's just a little extra insurance. All they really do is knock out a little of the obstruction out of the intake side.
There are some cases where I've actually seen a high flow pump cause more issues than it solves. With really high flow it's possible to pump enough oil to the top end of the motor to start sucking air. Not exactly the best way to create oil pressure.
There are some cases where I've actually seen a high flow pump cause more issues than it solves. With really high flow it's possible to pump enough oil to the top end of the motor to start sucking air. Not exactly the best way to create oil pressure.
Wait a minute. Do you mean flow being pumped to the top end can increase so much that the pan is pumped nearly dry of oil before the oil can flow back down into the bottom end and the pump pickup goes into cavitation? I doubt that a dremmel tool can make that big of a difference.
I would think the aftermarket pumps would be sufficient. Maybe if you were racing formula 1 or something.... but I think people get carried away sometimes doing things out of hear-say. The more you open up something to free its flow you could lower the output pressure also. I shimmed mine for one of my turbo builds but having it apart and inpsecting it, it looked pretty good the way it was I thought. I would buy a high volume one or a high pressure one versus grinding one.... unless your just smoothing the mating surfaces (port matching). My opinion though... be nice to see some tests if there is something to do that does help and not hinder anything.
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Wait a minute. Do you mean flow being pumped to the top end can increase so much that the pan is pumped nearly dry of oil before the oil can flow back down into the bottom end and the pump pickup goes into cavitation? I doubt that a dremmel tool can make that big of a difference.
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The only gain is higher flow. In stock form the pump is adequate, it's just a little extra insurance. All they really do is knock out a little of the obstruction out of the intake side.
There are some cases where I've actually seen a high flow pump cause more issues than it solves. With really high flow it's possible to pump enough oil to the top end of the motor to start sucking air. Not exactly the best way to create oil pressure.
There are some cases where I've actually seen a high flow pump cause more issues than it solves. With really high flow it's possible to pump enough oil to the top end of the motor to start sucking air. Not exactly the best way to create oil pressure.
I really doubt this. The Melling 10296 pumps 18% more than stock and I don't think porting a stocker will make it flow more than a 10296. And lots of respected builders use the 10296. HKE just put one in the build going in my car.....
There were some bearing failures in LS1 vettes that were road raced but it was from oil sloshing and exposing the pickup to air, not by pumping all the oil to the top of the motor.... One of the things that these guys started doing was running 20-w50 (Bondurant Driving School) that in theory stays up top longer and drains back into the pan slower.... Specially designed oil pans also help with this problem on road race cars.
And I have been running a high flow 10296 for 35K now no problems.....
This is myth........
i have a melling hv oil pump and have never had a problem the shop i go to uses them on most of they're builds so im gonna have to call bs on the oil pan sucking dry, if thats the case though you could always just add an oil cooler if you have an aftermarket radiator and that adds like another quart and a half or so. road racing often requires a baffled oil pan that holds more and keeps the oil from going to one side of the pan during hard cornering.
I really doubt this. The Melling 10296 pumps 18% more than stock and I don't think porting a stocker will make it flow more than a 10296. And lots of respected builders use the 10296. HKE just put one in the build going in my car.....
There were some bearing failures in LS1 vettes that were road raced but it was from oil sloshing and exposing the pickup to air, not by pumping all the oil to the top of the motor.... One of the things that these guys started doing was running 20-w50 (Bondurant Driving School) that in theory stays up top longer and drains back into the pan slower.... Specially designed oil pans also help with this problem on road race cars.
And I have been running a high flow 10296 for 35K now no problems.....
This is myth........
There were some bearing failures in LS1 vettes that were road raced but it was from oil sloshing and exposing the pickup to air, not by pumping all the oil to the top of the motor.... One of the things that these guys started doing was running 20-w50 (Bondurant Driving School) that in theory stays up top longer and drains back into the pan slower.... Specially designed oil pans also help with this problem on road race cars.
And I have been running a high flow 10296 for 35K now no problems.....
This is myth........
Porting the oil pump isn't much more than removing the sharp edges in the pump housing. The stock oil pumps as well as the 10295 and 10296 Melling pumps all have these same edges in the inlet and outlet passages.
Be conservative about how much material you remove and avoid the area the o-ring seats and you should be fine.
Be conservative about how much material you remove and avoid the area the o-ring seats and you should be fine.
its not actually "porting" its more like "blending". you are cleaning and soften the edges and gives it a better smoother path for the oil to flow.
your not going to be opening up the area by much so it shouldnt oil starve anything or even get close to it
you also need to shim it when you in there if you are going to port(blend) yourself.
your not going to be opening up the area by much so it shouldnt oil starve anything or even get close to it
you also need to shim it when you in there if you are going to port(blend) yourself.
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
I used the Melling M295 standard replacement pump. I got the piece of mind of a brand new oil pump while still maintaining the stock flow and psi rates, which IMO, are plenty adequate for a mildly modded engine.
