I am going to replace my oil pump when i replace the timing chain in a few weeks. After some reading on Tech, some suggest getting the HV Melling pump due to the Turbo feed line bleeding off some of the volume. what are yall's thoughts on that?


IMO i wouldn't hurt right?

 

Wouldn't hurt. But honestly a turbo doesn't use that much oil. I didn't notice any drop in oil pressure with the turbo. I am running the Melling high volume pump, lightly ported, with a high pressure spring. It bumped up my hot idle pressure from 35 to 45-50psi, and 80psi at redline. Just make sure your oil is topped off, there was some worry on tech that the high volume pumps can run the pan dry, which I think is BS but you never know. Our trucks hold more oil than the f-bodies anyways.

 

I am a fan of the L76 oil pump. It's a good 10psi higher than normal.

 

does it fit behind the standard LS1 timing cover?

 

It should, its pt#12612289. The L76 oil pump is also used on the LS4 and all the GMT900 trucks equipped with VVT aluminum blocks because the VVT system bleeds oil pressure and the aluminum blocks have larger oil passages than their iron counterparts iirc. I dont recall the gen4 timing covers being any deeper than the gen3.

 

Yeah, just uses the standard cover.

 

Melling pump, L76 pump, LS6 pump...they all work.

 

 

Them there VVT oil pumps are serious.