View Poll Results: What oil pump?
Stock pressure / volume
3
25.00%
High volume
4
33.33%
High pressure
5
41.67%
Doesn’t matter dummy
0
0%
Voters: 12. You may not vote on this poll
Main clearance question with oil pump
Thread Starter
On The Tree
Joined: Sep 2010
Posts: 145
Likes: 5
From: Lima oh
Main clearance question with oil pump Running a 4.8 gen 3 -
7875 vs racing
forged bottom end
shooting for 700 tire -
stock polished 5.3 crank
got my block back from machinists
shooting for .0025 - .0030 main gap
will my melling high pressure oil pump work well for this application? Seems to have been quite the topic in regards to many guys running a high volume with good results.
so my curiousity piques myself if anyone has any knowledge of sorts . Thank you
7875 vs racing
forged bottom end
shooting for 700 tire -
stock polished 5.3 crank
got my block back from machinists
shooting for .0025 - .0030 main gap
will my melling high pressure oil pump work well for this application? Seems to have been quite the topic in regards to many guys running a high volume with good results.
so my curiousity piques myself if anyone has any knowledge of sorts . Thank you
I'm in between the .0025-.0030 range with a high volume oil pump on the LSX with 5w30 or 10w30 and pressure nears 80 psi cold and runs at 60 psi with a hot idle 50 psi. IMO I think you'll be fine with that clearance but certainly nothing wrong with being on the looser side of things and running a heavier oil.
IIRC I don't think a high volume pump is a good idea because in some cases, it can pump the pan dry before the oil drains back to the pan. High pressure pump, I think is OK.
This is true and I was getting some vectoring with a stock pan and it could have been solved by adding more clearance on the oil pickup but I ended up swapping to a Moroso 21150 setup and the Milodon oil filter relocation kit which allows for an additional quart of oil capacity.
In a drift car application, you’ll want an oil cooler. The 10296 HV pump is perfect for an oil cooler setup. 13% more oil volume than a 10295 pump won’t drain a pan dry. If your concerned about that happening, run 6.5-7 quarts. The extra volume will keep bearings and assembly cooler. Run the biggest oil filter you can fit in the chassis.
Joined: May 2004
Posts: 1,593
Likes: 267
From: Halfway back on the Highway to Hell...again!
Actually thats too much clearance for a drift motor. You want a tighter clearance. more like .0015 to .002. A tighter clearance keeps more oil on the journal and better support.
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If you calling melling and tell them your setup and intended use they will tell you the correct pump to use. Personally I think your pump will be fine but I’d call and ask them
TECH Resident
Joined: Sep 2019
Posts: 819
Likes: 261
From: Melbourne, Australia
I'm in between the .0025-.0030 range with a high volume oil pump on the LSX with 5w30 or 10w30 and pressure nears 80 psi cold and runs at 60 psi with a hot idle 50 psi. IMO I think you'll be fine with that clearance but certainly nothing wrong with being on the looser side of things and running a heavier oil.
I run the standard volume high pressure, i have an oil cooler, 10w40 .0026 clearance , 40psi at hot idle
Maybe I didn't really need it but I did really want it. Oil pressure is 60-70 psi cold with a 50 psi hot idle and it's been to 7K rpms at least a dozen times. It always gets the high ZDDP full synthetic 5w30 or 10w30 and my 2015 build has over 15,000 miles on it now.
TECH Resident
Joined: Sep 2019
Posts: 819
Likes: 261
From: Melbourne, Australia
Maybe I didn't really need it but I did really want it. Oil pressure is 60-70 psi cold with a 50 psi hot idle and it's been to 7K rpms at least a dozen times. It always gets the high ZDDP full synthetic 5w30 or 10w30 and my 2015 build has over 15,000 miles on it now.
For the OP, I think you would be okay with a stock volume pump but a 10296 wouldn't be a bad idea either IMO. I have a turbocharged iron 4.8L that I built with bearing clearances at .0022-.0025". With the stock volume pump and stock f-body pan, I'm around 20psi at a hot idle, but with load and RPM, it gets up around 40-50psi. Drifting will likely get the oil temps hotter and slosh the oil around in the pan a lot, so I think a 10296 pump paired with a good baffled pan will be a better setup. .
[QUOTE=KCS;20363098]
LOL, have you been watching Hoonigan's engine building videos? Guilty! No I actually read that somewhere and can't remember where but it said that you needed at least three.
LOL, have you been watching Hoonigan's engine building videos? Guilty! No I actually read that somewhere and can't remember where but it said that you needed at least three.
Joined: May 2004
Posts: 1,593
Likes: 267
From: Halfway back on the Highway to Hell...again!