63 replies to this topic

[ls2lxhatch]

The sump I have I dont think is stock. What is the oil volume of a stock sump? I havnt put oil in the motor yet but will be soon.

I think you will be fine with a high volume pump and a stock sump in a street car. In a street car a high volume pump will just reach the bypass pressure at a lower rpm than a stock pump. At 4000 rpm a high volume pump should not be pumping any more oil to the top on the engine that a standard volume pump. The high volume pump should be bypassing more oil but the bypass is at the bottom of the engine.

High volume pumps in a race engine that spend most of the time over 4000 rpm is another story.

[76lxhatch]

They do move more oil despite restrictions on pressure, and if the oiling return is not 100% up to scratch and the sump 100% full then it is entirely possible to suck air with a high volume pump and standard sized sump on a street car (been there, done that...)

The problem is that a Holden V8 oil pump won't self-prime so a second or two of sucking air can be enough to stop oil circulation altogether!

[hanra]

When I initially go to start the motor, I will be removing the HT lead and just cranking it for a bit. Should I fill the oil filter with oil initially? On my A series, I filled the oil pump with vasolene during the rebuild to help it prime up initially.

[yel327]

^^That's why we put fibreglass in it!

[76lxhatch]

When I initially go to start the motor, I will be removing the HT lead and just cranking it for a bit. Should I fill the oil filter with oil initially? On my A series, I filled the oil pump with vasolene during the rebuild to help it prime up initially.

Cranking the engine in an attempt to build oil pressure is a good way to ruin a fresh set of bearings in a Holden V8; just start it straight away as the pump needs more revs to get any pressure. Also there is absolutely no way that these pumps will self-prime, you _must_ manually prime it first if its dry. A lot of guys seem to like Vasolene for this although I'm not really a fan of introducing foreign materials into the oil. My preference is to use an external pump to fill the oil pump via the sender hole or even via the filter fitting, I have this cheap and nasty looking thing:

Just attach a hand pump to the tube and fill, then swap for a filter.

[ls2lxhatch]

I aways fill the oil filter as much as possible before fitting on any car. It will not help prime the pump but it will reduce the amount of time it takes to reach pressure.

[TerrA LX]

Anyone?

[hanra]

MV308HV

[ls2lxhatch]

The bad news is that appears to be a Procomp part number.

[hanra]

How long have Procomp been around for? Reason I ask is, the pump was painted red the same as the engine and I reckon that was done quite a few years back when it had its REPCO pistons fitted.

Edited by hanra, 26 August 2012 - 07:25 AM.

[Stinga]

procomp electronics, established in 1980

http://store.procomp...om/t-about.aspx

not sure about the aussie side of things though?

Edited by Stinga, 26 August 2012 - 08:21 AM.

[hanra]

True aye. Thought they were only a new company?

So if I can't get a genuine Holden pump what is the next best option in std volume?

Searching that pn I can come up with an Austral semi HV oil pump also? Who's Austral???

And if I go to a std pump will the bolts I have be suitable? Is there a difference in physical size of hv and std pumps?

Edited by hanra, 26 August 2012 - 08:36 AM.

[ls2lxhatch]

And if I go to a std pump will the bolts I have be suitable? Is there a difference in physical size of hv and std pumps?

HV pumps have longer bolts. Around 10 mm from memory.

Personally I prefer the HV pumps for engines that spend most of the time at low rpm, particularly worn engines.

[dattoman]

Buy a JP brand one if you can't get an original alloy one

Thats what I did

[hanra]

HV pumps have longer bolts. Around 10 mm from memory.

Personally I prefer the HV pumps for engines that spend most of the time at low rpm, particularly worn engines.

Sounds like me then! I'll only be cruising around in this thing. Not a race car.

[dattoman]

So did you buy those 5 used alloy ones on ebay for $136 ?

[hanra]

Hahahaha. Nah I seen em there, but I didnt really want to go fitting unknown 2nd hand bits that are quite crucial to the motor. Ill just get a new JP std one I think. Ill give Holden a call on Monday just to confuse the parts fella and ask him if they stock them. I think I read somewhere they dont.

[A9X]

They don't , not the originals anyway.

Been down that path years ago

[hanra]

Cool. I just wanted to play silly buggers with em. They would be scratching there heads as to what a three oh eight is?

[Stinga]

you can buy new gears for them, not sure if the gears are different between the alloy and the cast iron ones though?

[hanra]

As I have next to no knowledge on them, is the replacement of the gears going to be a instal and forget arrangement? As there has to be X amount clearance at the end of the housing with the gears I believe?