I ordered my fm13 with a ported oil pump and was wondering if the new pump increases oil pressure and if so by how much.Also how has your oil pump been working for you

 

Oil pump are ported for flow and shimmed for spring (more pressure)
No way to tell until on car and it also depends on type/ weight of oil used.

IMO a deeper/fin cooled oil pan is more beneficial than a pump as LS6 pumps flow plenty.

 

thanks for the response no hard feelings about the ls1 vs cobra thread was just jokein .Do you have one on your motor and if so what ia the psi at operating temp.I use 10w30 mobil 1 just to give you an idea

 

from my experience i was getting 40 psi at cold idle...now it is 60...but then again i had 98 pump with 99k miles on it...so that may mean a bit....oil pressure never goes below 40psi

 

See I'm thinking about getting a cam, but I dunno about replacing my oil pump because on cold start ups I'm getting 60psi and holding ATLEAST 40 ALWAYS.

 

the more the better...haha

 

Well there is something called too much pressure. Just like motor operating temp, a lot of poeple are under the impression that running a cooler motor ie 180, 190 *F is better but in fact, optimum running temp for an LS1 is 210*.
Pump failure is a problem or not enough pressure but too much can affect proper oil metal coating properties and splashing on various parts.

 

Awesome. Well my stock oil pump looks to be doing just fine for me and my car runs @ exactly 210 all the time. So it looks like I'm good to go.

 

Why is 210 better runing temp than 180 for a ls1,I would think cooler is better specially on a all alum. block which warps easyier at a higher temp.

 

Most believe that pressure = lubrication. This is false. Flow = lubrication. If pressure was the thing that somehow lubricated your engine then we would all be using 90 weight oil. Lubrication is used to separate moving parts, to keep them from touching. There is a one to one relationship between flow and separation. If you double the flow you will double the separation pressure in a bearing. The pressure at the bearing entrance is irrelevant.

In fact the relationship between pressure and flow is in opposition. If you change your oil to a thicker formula the pressure will go up. It goes up because the resistance to flow is greater and in fact the flow must go down in order for the pressure to go up. They are inversely related. Conversely if you choose a thinner oil then the pressure will go down. This can only occur if the flow has increased.

It seems then that we should all be using the thinnest oil money can buy. This is partly true. The gold standard is that all engines should have a pressure of 10 PSI for every 1,000 RPM of operation, not more, not less. After all, you do need some pressure to move that oil along, but only enough pressure, not more. More pressure is not better, it can only result from the impedance of oil flow. Remember that oil flow is the only thing that does the lubricating.

What am I saying here? Don't spend time worring about the oil pressure. Like PREDATOR-Z sez, the LS6 oil pump flows enough already for your needs, and you now know that flow is more important than pressure. Run the proper viscocity synthetic oil and you'll be fine.

 

i had the ported LS6 oil pump installed with my TR224. Ive noticed a huge increase of pressure when cold, and when I get on it hard.
20pounds differance

at idle im 40-43 ish

When I get on the motor. I hit 70 pounds. When I get of the gas it drops back down

 

so maybe when i turn my fuel pressure up...more fuel doesnt get into the engine

 

......

 

maybe we should all open up our rod side clearances to like 1/2" so that we can flow more oil and then we will have better protection. because "the pressure at the bearing entrance is irrelevant.

 

slow3hoe2:

i dont think you're catching on to what hes saying.......



but to answer your smartass question, no. at a higher pressure, your fuel pump is flowing LESS.

just because fuel pump X is rated for 255gph free flowing, doesnt mean it will flow 225gph at 50psi.


i think you need to do some basic research before you reply with another smartass remark.

 

my old shortblock would idle at ~20psi. new forged shortblock w/ ported ls6 pump has 60psi at idle

 

so when my fuel pressue is at 40psi...then i move it up to 60psi...i am flowing less fuel through my injectors?

and sorry for being a smart ***. im jsut trying to understand this correctly. im am not an expert on oil flow...but im not a dumb *** when it comes to this stuff either. It was stated that oil pressure is doesnt matter...its oil flow...then it was stated that you need 10psi for every 1000rpms. so if oil pressure doesnt matter...then why do you need 10psi for every 1k rpms? Im not sitting here saying that an ls1 needs more oil pressure...im just talking in general. The pressure of the oiling system is created by restrictions...at the end of each thing being fed. So using the same weight oil...if you raised the pressure...why wouldnt you be flowing more oil through the restrictors?

I can adjust the pressure on my oil pump in my stang engine. Ive played around with different pressures...then inspect parts when i am freshening the engine. From what ive seen...more pressure = less wear on the bearings.

sorry for being a dick. i guess try to explain this to me because i guess im not as knowledgable as i thought.

The only reason i could see boosting the pressure on an engine that is already wearing fine is to run a hyd roller cam at higher rpms.

 

actually...that didnt answer my question. i didnt ask if the pump was flowing more fuel...who cares about that...i asked if there was more fuel going into my motor.

Yes the pump is actually pumping less fuel...but more fuel is going through the injector and not returning into the tank. Oiling system works in a similar way. so thats why i was questioning why if you turned up the pressure you wouldnt get more oil flowing through the bearings? pump capacity actually is brought down...but more oil is getting flowed through the bearings.

this may be wrong. not trying to start anything..even though i was a smart *** earlier. just trying to understand. thanks

 

look at it this way, at higher pressure, less volume will pass because its fighting the higher pressure.

Look at an air compressor that flows 12 CFM @ 50 PSI, but only 6 CFM @ 90 PSI. Volume is traded off for pressure.

 

more fuel thru the injectors... the hole is open for the same amount of time,(or in the case of carbed jets, the same size hole) but the amount of pressure behind it forces more out in that given amount of time... so the engine gets more fuel.

the pump however, is capable of supplying less volume at that higher PSI....



but this is a totally diffrent case then your oil pump.

your oil pump is a positive displacement pump. it will move X volume of oil per revolution.
this amount does not change, regardless of the oil pressure.

now at anything above a slow idle, its pumping more fluid then the motor needs. thats why theres the pressure bypass.
upping the spring pressure changes the pressure on the system... but does not change the volume pumped. it just goes to a higher pressure before it bypasses it.

now going off of our fuel model above, yes, this does equal a greater volume going thru the motor... the same size hole sprays slightly more fluid thru the motor....

but this isnt the problem hes describing.

heres the problem most people seem to see... i run low weight oil X and i get 40 psi... i run thicker weight oil Y and get 60 psi... so their thinking is: thicker Y oil is better. i get more oil pressure


the reality is, you made it thicker, so less can fit thru that hole in your motor... less sprays out, because its more of a restriction... oil pressure reads higher, but the engine is getting less oil.


in a nutshell:
same viscosity @ higher pressure = slightly more flow... athough theres some debate to if more flow is needed as the factory already allowed alot of leeway.. more pressure also = more drag on the motor from the oil pump.

thicker viscosity @ higher pressure != more flow.. unless you jacked the oil pressure ALOT higher.

while there is a minimal amount of pressure needed to ensure that the oil is not squeezed out of the bearings, this pressure isnt very much... and changes depending on load.. hence the 10psi per 1000 RPM rule of thumb......