LS2 lifter orientation during install
Thread Starter
Track Junky
Joined: Jun 2007
Posts: 4,074
Likes: 36
From: Orlando Area
Tech Contributor
LS2 lifter orientation during install
I'm in the middle of a H/C swap and I got the lifters out the other day. I didn't pay much to the orientation of them while removing, but now I see an oil port on only one side of the lifter. In looking at the oil runner configuration in the block, it appears that they have to in a specific way to line up the oil port in the lifter with oil runner in the engine block. Can somebody confirm this?
Here is the way I think the oil port should be oriented, from front lifter toward the rear.
Driver side - up, up, down, down, down, down, up, up
The outer two on either end could be pointing either way, but I'm guessing that up is the preferred.
Pass side - down, down, up, up, up, up, down, down
The inner four could be oriented either way, but I'm guessing up is preferred.
If for some reason they were not installed in this configuration, it appears that the lifter may not see full (or minimal) oil pressure.
Am I out to lunch here? Can't find any info in my limited research.
Sean
Here is the way I think the oil port should be oriented, from front lifter toward the rear.
Driver side - up, up, down, down, down, down, up, up
The outer two on either end could be pointing either way, but I'm guessing that up is the preferred.
Pass side - down, down, up, up, up, up, down, down
The inner four could be oriented either way, but I'm guessing up is preferred.
If for some reason they were not installed in this configuration, it appears that the lifter may not see full (or minimal) oil pressure.
Am I out to lunch here? Can't find any info in my limited research.
Sean
Thread Starter
Track Junky
Joined: Jun 2007
Posts: 4,074
Likes: 36
From: Orlando Area
Tech Contributor
After a little more thought and research on other forums, it doesn't look like it matters. I'm thinking now that the smaller "ports" on the top could be oil return lines back to the sump. (I can't find any info explaining the oil flowpath through the engine and valvetrain to verify). With the smaller diameter of the lifter where the oil port is located, it would see full oil pressure no matter what from the oil runner it sits in.
Sorry to confuse anybody. I think I will point them all down to be directly in the main flow of oil with the engine running.
Sorry to confuse anybody. I think I will point them all down to be directly in the main flow of oil with the engine running.
Thread Starter
Track Junky
Joined: Jun 2007
Posts: 4,074
Likes: 36
From: Orlando Area
Tech Contributor
Thanks 3holer. I think I was just confusing myself when I saw the random placement of the oil ports installed. After I thought it for a bit, I convinced myself the same answer you got.
Did you get your car buttoned back up yet? What was your final PTV? I'm very interested to year your dyno numbers.
Did you get your car buttoned back up yet? What was your final PTV? I'm very interested to year your dyno numbers.
Instructor
Joined: Oct 2010
Posts: 100
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From: Michigan
Hey Sean, I did get it back together yesterday. With the exception of the new stat not opening up and damn near toasting my motor, everything was relatively smooth. Like others have experienced, it really doesn't want to idle all that well after coming to a stop. Since I'm running through my stock mufflers the sound is actually very tame. Now it's time to get my slot on the dyno for a tune and keep my fingers crossed for good numbers.
With regard to my final PTV, I stayed with the stock .052's. I was at
.074 and given the fact that this build was not meant to be an all out max effort, I erred on the side of caution.
With regard to my final PTV, I stayed with the stock .052's. I was at
.074 and given the fact that this build was not meant to be an all out max effort, I erred on the side of caution.
Tech Contributor
Joined: Jul 2002
Posts: 14,949
Likes: 263
From: St. Louis, MO
St. Jude Donor '08
Hey Sean, I did get it back together yesterday. With the exception of the new stat not opening up and damn near toasting my motor, everything was relatively smooth. Like others have experienced, it really doesn't want to idle all that well after coming to a stop. Since I'm running through my stock mufflers the sound is actually very tame. Now it's time to get my slot on the dyno for a tune and keep my fingers crossed for good numbers.
With regard to my final PTV, I stayed with the stock .052's. I was at
.074 and given the fact that this build was not meant to be an all out max effort, I erred on the side of caution.
With regard to my final PTV, I stayed with the stock .052's. I was at
.074 and given the fact that this build was not meant to be an all out max effort, I erred on the side of caution.
If you're tuning yourself, increase your base running airflow table 10% until it gets better. If you go too high you'll get too high an idle or cruise control.
