15 replies to this topic

[The German]

Dear Torana friends,

 

Still having a karfuffle with loosing oil pressure in tight curves at the Nürburgring by using racing slicks.

 

I need to stay with a wet sump by historic racing regulations.

 

The sump and pickp im using is from high energy , Filled with 6,5 litre of oil. ( Can it be used with more oil ? )

 

As i did read at the Aussie V8 Forum that its not a oil pan issue by gravity more then a Oil return from cylinder heads  problem.

 

There is a external drain back recommended at the rear of the cylinder heads to avoid that oil returns to sump much better.

 

Not sure what i need to do when i take out the engine.

 

Options:

 

1. External oil lines from rear of cylinder heads to oil pan. Or at the front of the cylinder heads into the timing chain cover housing.

2. Crow pushrods with restricted oil holes.

3. Plug into the timing chain greasing valve

4. Baffeled valve into the intake manifold.

5. Hose from dip stick tube to valve cover

 

Also i didnt get ever oil pressure when starting without ignition.

Swap oil from 10W60 to 20W50 Penrite didnt make a difference.

When engine was cold i had approx 58psi when hot at race track 21psi - 29psi at above 3000rpm.  Sometimes a total loss at idle.

 

Thats why i will change this winter the oil pump system to a Dodge/Chrysler Mopar pump and try to find out what this does to the engine.

 

Has somebody experience with those modifications ?

 

Uwe

 

 

 

 

[rodomo]

http://www.gmh-toran...esign-oil-pump/

[Lima31]

One of the holden v8's biggest design flaws is that oil is sent to the camshaft bearings first, taking too long to reach the main bearings and the excess is sent to the lifters, draining the sump under hard driving.

 

Read this: http://www.performan...t-67209032.html

 

Watch this:

[TK383]

You will need a better sump than a basic hi energy, contact ASR oil pans & get them to build you a circuit race pan with an external pickup.

 

http://www.asroilpans.com/

 

For oil pump you can either modify a stock pump to work with an external pickup or use a single stage belt driven pump - Savy motorsport do a kit for a single stage pump, their stuff is good.

 

http://savymotorsport.com.au/

 

Next you'll want to do the mod posted by Lima31, along with that you can add an extra line from the oil gallery bulkhead at the front of the valley to the LH side oil gallery just behind #4 cam brg.

 

Drainbacks in the heads need to be opened up, drainbacks in the valley smoothed.

 

Use LARGE breathers from the rocker covers to a catch can - usually -16 AN works well.

 

You can restrict the pushrods a bit, but any smaller than a .030" hole will significantly reduce valve spring life - the springs need oil to cool them.

Edge orifice lifters are a good idea.

 

You didn't mention if it's a flat tappet or roller cam? - roller cam you cannot restrict flow to lifters.

 

Lastly, stop using treacle for oil, switch to a 10/40 mineral oil - drains back faster.

[mick_in_oz]

Are the undersized cam bearings still available?

[Lima31]

Are the undersized cam bearings still available?

 

Yep Durabond still make them, ebay says the part number is HO-2SX2

[The German]

One of the holden v8's biggest design flaws is that oil is sent to the camshaft bearings first, taking too long to reach the main bearings and the excess is sent to the lifters, draining the sump under hard driving.

 

Read this: http://www.performan...t-67209032.html

 

Watch this:

...im a bit lost in translation of the modding video.

 

The restriction in #4 main cam bearing is not well to see. Is it a total block or a insert with a tiny hole?  And what size would it have ?

[Lima31]

...im a bit lost in translation of the modding video.

The restriction in #4 main cam bearing is not well to see. Is it a total block or a insert with a tiny hole? And what size would it have ?

If you have solid lifters, then total block. If hydraulic lifters, 1.5 mm hole. Make sure you block the correct side.

[koalasprint]

Hi Uwe, these videos might help. All based on TK's work and COME. https://www.youtube....olBA3tK5xESNPUP

Regards Steve.

Edited by koalasprint, 05 December 2018 - 12:41 PM.

[Big_Red]

Can you use a accumulator??

[warrenm]

Posted Today, 07:29 PM

the ASR race sump is well developed and a must. reasonably priced and you need to give them a sump as an exchange. wont take a old high energy in exchange . worth every cent.

 

I don't have any experience in the V8 lifter bores, or the roll pins in the push rods.

 

but if you dropping pressure then it only starts at the bottom, also there is a different oil pump as well and i cannot remember who makes this as a replacement to the standard one in OZ - someone may be able to help here and it is supposed to be far superior to the standard offering.

 

G

 

The oil pump you refer to , may be a modified Hemi pump.

[The German]

Oh,

 

i have made a oil pump modification with a Mopar 440 oil pump as well.

[The German]

An update for the LYNX Oil pump adapter Holden to Chrysler.

 

I bought the LYNX Oil pump adapter kit to try the Chrysler pump. From the USA i ordered a Milodon CNC Mopar pump and made a run with it.

 

So the original oil pump drive shaft did shear of at the connection point after the second run.

 

The pump was making oil pressure even only with the starter motor what never happend with the original oil pump.....i had to idle the engine a bit before pressure came up.

 

Cold, the Mopar pump made approx 80psi at high revs but less when hot.

 

I would recommend or try to use a long adapter oil pump drive shaft to avoid shear forces with a two piece .

 

Unfortunately LYNX doesnt make long shafts and didnt reply when i asked. I was also not happy with the quality of the cast.

 

Now i have a adapter with no use .

 

Uwe

 

 

[Shiney005]

I don't know if the Hercules one is still available, but it always looked better than the Lynx to me.

https://www.whichcar...ump-tech-torque

 

 hercules-oil-pump-3.jpg   30.3K   3 downloads

 Hercules-oil-pump-6.jpg   26.95K   3 downloads

 Hercules-oil-pump-7-nw.jpg   202.47K   4 downloads

[Lima31]

I don't know if the Hercules one is still available, but it always looked better than the Lynx to me.

https://www.whichcar...ump-tech-torque

 

Apparently still listed with Precision, part numbers are ML308ML63HPPM (high pressure) and ML308ML63PM (std)

https://www.precisio...h=ML308ML63HPPM

https://www.precisio...rch=ML308ML63PM