hv oil pump or not
Thread Starter
Launching!
Joined: Aug 2010
Posts: 242
Likes: 0
hv oil pump or not I am building a 429 ci ls3 alum block. 4.070 x 4.125 mains .0028-.003 rods .002-.0023.
In my application keeping enough oil in the pan can be a bit of a challenge at times. Adding 1/2 quart helps.
Will running a hv oil pump make it worse or is it something should probably have because of the aluim block and clearances I have?
In my application keeping enough oil in the pan can be a bit of a challenge at times. Adding 1/2 quart helps.
Will running a hv oil pump make it worse or is it something should probably have because of the aluim block and clearances I have?
TECH Resident
Joined: Aug 2004
Posts: 875
Likes: 2
From: Portland Oregon
That is a huge clearance for mains on a LS motor. From my expereince and everything
I read .002 is the max max for mains. Std pump works fine, even for road racing.
If you run .0028, you will need a high volume pump with a big shim to get any oil pressure..
I read .002 is the max max for mains. Std pump works fine, even for road racing.
If you run .0028, you will need a high volume pump with a big shim to get any oil pressure..
Staging Lane
Joined: Dec 2006
Posts: 55
Likes: 0
My LS3 LPE block had those type of clearances and could not maintain pressure once the oil was at track temps. That was with a high volume pump. I pulled the motor to have the clearances tightened up. Street driving was fine. Main clearances are now in the .0022 range. LPE still installed a shimmed high volume pump. Cold oil pressure is extreme now but I have no problems maintaining 50 psi at 260 degrees at the track. I just keep the revs below 2000 rpm until the oil is at least 150 degrees.
I run the Melling 10296 in my 2000 fbody and have had 0 problems.
Though I did have the oil pan enlarged to the front. Full fill ( oil change ) with filter is 6 1/2 quarts. Just clears my tubular K member by 1/4 inch.
Mine maintains 50psi @ a 750rpm idle with a ls2 block and 4.125 stroke.
Granted a little too much oil splashing around may take away a few HP, but I'd rather have a little more oil then not enough.
Though I did have the oil pan enlarged to the front. Full fill ( oil change ) with filter is 6 1/2 quarts. Just clears my tubular K member by 1/4 inch.
Mine maintains 50psi @ a 750rpm idle with a ls2 block and 4.125 stroke.
Granted a little too much oil splashing around may take away a few HP, but I'd rather have a little more oil then not enough.
I ran the HP spring in my old set up and will be running it in my new 416 build. I never had an issue and I loved the fact that I had 60lbs at start up and never moved from there no matter how hot is was. At WOT it was at 75ish. I would always add 1/2 quart more and ran pennzoil or quakestate 10-30 always. NO issues ever.
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