What are you guys using for oil pumps nowadays?

[Brandon Sinclair]

I read that there was some qualiy control issues with the Shadek pumps.

I am looking for a 26mm pump and always liked the o-ring on the back end like Berg provides.

[Lids]

still using my berg, are they not available any more?

[Jim Ratto]

I'd be interested in finding out factual information on "quality control issues" with Schadek pumps. We sold 676 26mm Schadek pumps last year, took ONE back that was defective. Reason it came back? Shipping damage.
We sold 589 30mm pumps, with one defect coming back. That one I don't know reason for comeback.

I've used Schadek pumps in every motor I've built since 1993.

[181]

I´m happy with my 26mm Schadek modded by Jim ratto himself :-)

[RhoadsVW]

You said you hear they are having problems with Shadek pumps.  What type of problems have you read or heard. I use over a hundred a year with no problems. Mostly use the 26mm but also 30mm.  Dave Rhoads

[nicolas]

shadek works for me as well.

!warning tread highjack!

why opt for a 26mm if 30mm is also available. bigger is better, right? i know it isn't, but i never understood why...

[DKK Ted]

Been using berg's 26mm for years, and still using them. No problems.

Ted

[Brandon Sinclair]

Thanks for the info guys.  Just wanted to make sure what I was reading was not fiction.  I guess it is.

From what I read quality control was an issue with the outside diameter of the pump body.  Suppose to be an interference fit with the case and I read that they were now manufacturing them smaller in error. It is a simple check during blueprinting the pump and it is good to know this is not common.

Thanks

[Taylor]

I read that there was some qualiy control issues with the Shadek pumps.

I am looking for a 26mm pump and always liked the o-ring on the back end like Berg provides.

The last pump I got from bergs wasn't shadek. 

[SlingShot]

shadek works for me as well.

!warning tread highjack!

why opt for a 26mm if 30mm is also available. bigger is better, right? i know it isn't, but i never understood why...

Ever tried shoving 30 elephants in a room that only holds 26

[Bruce]

shadek works for me as well.

!warning tread highjack!

why opt for a 26mm if 30mm is also available. bigger is better, right? i know it isn't, but i never understood why...

Ever tried shoving 30 elephants in a room that only holds 26

Ever wonder why during the last 10 years of production, VW installed a 30mm pump?

[qubek]

shadek works for me as well.

!warning tread highjack!

why opt for a 26mm if 30mm is also available. bigger is better, right? i know it isn't, but i never understood why...

Ever tried shoving 30 elephants in a room that only holds 26

Ever wonder why during the last 10 years of production, VW installed a 30mm pump?

What else was changed in the oil system at this time?

[Torben Alstrup]

Hello.
The "quality issue" with Shadeks has mainly been variations in the pump housing dia. I do not have the numbers in my head, but I have come across about 10 or so over the last 1½ year that was under VW specs. I O ringed those and used them on tighter specs cases with no problems. I have not seen much variation at the pump gears.
When VW swopped to a 30 mm pump, they also began using hydraulic lifters, which requires a good deal extra oil flow to work properly. On the CT engines they even went back to single relief oil system with an internal bypass system a´la type 4 hydraulic engines.
 IMHO a healthy type 1 engine doesnt need a 30 mm pump,(Aluminium cases aside) unless it is attached to a front mounted oil cooler or has a turbo mounted. Then the extra volume comes in handy. But the 26és have been hard to come by for a while, so I have been forced to use 30ies too. I then have to spend more time to get the end play slack properly set up in order to avoid extreme oil pressure, - and/or install a pump cover with pressure relief.
T

[qubek]

...(Aluminium cases aside)...

Why?

But the 26és have been hard to come by for a while,....

What about stock 26 mm pumps? You just prefer to use new units, or is it some other reason you don't use them?
I'm asking because that's what I did.

[Torben Alstrup]

The Alu cases have a different casting shape in the pump housing area, so you need a 30 mm pump to "cover the grounds". that was the short version 
The stock pumps will naturally do. But if they are worn, its time to replace it.
T

[Bruce]

shadek works for me as well.

!warning tread highjack!

why opt for a 26mm if 30mm is also available. bigger is better, right? i know it isn't, but i never understood why...

Ever tried shoving 30 elephants in a room that only holds 26

Ever wonder why during the last 10 years of production, VW installed a 30mm pump?

What else was changed in the oil system at this time?

They added a spin-on oil filter.

[qubek]

But the 26és have been hard to come by for a while, so I have been forced to use 30ies too. I then have to spend more time to get the end play slack properly set up in order to avoid extreme oil pressure, - and/or install a pump cover with pressure relief.
T

Can you tell something more about the end play settings? What is the connection?

What about pressure relief valve springs? I mean - the one in the case, directing oil to the cooler. 

[Torben Alstrup]

The connection is, when you increase endplay slack (tolerance between the gears and the pump housing) with say 1/10 mm. the pump bypasses a little more oil, thereby reducing excessive oil pressure at higher rpms.
And yes, you have to find the correct strength of the bypass spring too. Or just close your eys and install a HD set.
T

[jaqo]

OK I'm just curious - what oil pressure should there be at various RPMs?  For example 1000-2000-3000-4000RPM?

[Arnoud]

[/quote]Ever wonder why during the last 10 years of production, VW installed a 30mm pump?
[/quote]

Hydraulic lifters,spin-on oil-filter.

[qubek]

Or just close your eys and install a HD set.

It seems that this is what I will have to do. I have access to 30 mm oil pump and a HD spring set. I don't have any new 26 mm pump around and the used 26 that I tried just don't give enough pressure.

[Jon]

 Hi Torben,

The connection is, when you increase endplay slack (tolerance between the gears and the pump housing) with say 1/10 mm. the pump bypasses a little more oil, thereby reducing excessive oil pressure at higher rpms.

Are you saying that the 30 mm pump has such a high flow that you are building pressure against the oil gallery? I always thought it was the clearances in the bearings and the system pressure regulator that were (ideally) regulating the pressure.

[Felix/DFL]

The connection is, when you increase endplay slack (tolerance between the gears and the pump housing) with say 1/10 mm. the pump bypasses a little more oil, thereby reducing excessive oil pressure at higher rpms.
And yes, you have to find the correct strength of the bypass spring too. Or just close your eys and install a HD set.
T

Increasing endplay reduces the effective volumeflow delivered by the pump cause of the inner bypass.

You want to keep that axial play as tight as possible to get the best volumetric effencity.

The problem of too high oil pressure is a problem of a to small bypass regulator hole in the case. The later cases had bigger bypassholes than the earlier. If I remember correct early 6mm late 8mm.
With an small hole case you can`t blow away the amount of oil that is delivered by the pump on high rpm`s so the pressure rises. Take a look at that hole (you could measure the plug under the flywheel before mounting a 30mm pump. If it`s a small you could drill it bigger...

Just for side notice. A Pump doesen`t deliver pressure!
The pump delivers oil flow. The reached oilpressure before the regulator opens is a consequence of the bearing gaps or other oil leakages in the case.
The regulator regulates the maximum pressure in the case at a wanted plateau which you could modify by changing the spring pressure.