930 oil pump...930 piston squirters? in an 3.1

[Steve G]

Here's a question.....
I have a 3.1 engine in rebuild at the moment and was already fitted with a 930 pump.
I will shortly be replacing the piston squirters, so the question is this.
The 930 pump is a little excessive on the pressure side for the 3 litre.....going by what i've read......as for the scavenge...well you can never have enough!!
As i have this excessive ( not harmful ) oil flow should i fit the turbo squirters instead of the standard 3 litre ones?
I'm interested to hear your thoughts....

[Steve G]

Anyone? I presume they are the same outside diameter as its the same case?

[dannobee]

Pressure is regulated by the springs in the case, not by the pump itself. Anything more will just be bypassed back into the inlet of the pump.

They used bigger piston squirters on the turbos to help better cool down the pistons with the added power and heat from the turbo. Then the heat could be removed by the oil cooler(s).

[Steve G]

Originally Posted by dannobee

Pressure is regulated by the springs in the case, not by the pump itself. Anything more will just be bypassed back into the inlet of the pump.

They used bigger piston squirters on the turbos to help better cool down the pistons with the added power and heat from the turbo. Then the heat could be removed by the oil cooler(s).

Thanks for your answer, it was my point exactly.
With this pump fitted i'll have excess flow which for most of the time will be bypassing back to the case by the pressure regulating valve.
I already have the pump.....and the squirters need to be replaced....that's why im pondering whether or not to replace the squirters with turbo items to take advantage of the extra flow thats not really required.

['78 SC]

NOTE: see observations below about measured size of new squirters; the comments here are 6.0 mm may be erroneous

Squirters are specified by nozzle diameter and overall bore diameter.

Porsche sells two bore sizes of squirters (6.0mm and 6.6mm diameter), but apparently some 3.0 cases have an intermediate size squirter installed (mine were 6.27mm). If you have the intermediate size, you will need to drill out the case bore to accept the larger, 6.6mm squirter. I used a letter size "F" drill to do this. Nerve racking, but not difficult.


Discussion of piston squirters here and here. Good information, but occasionally sidetracked by various issues.

[dannobee]

If you don't have a turbo, you don't need to replace the squirters. Just verify none of them are plugged.

[Steve G]

Originally Posted by dannobee

If you don't have a turbo, you don't need to replace the squirters. Just verify none of them are plugged.

The squirters are dead and need to be replaced....hence why i'm wondering to replace them with 930 items.

[Jonny042]

Originally Posted by '78 SC

Squirters are specified by nozzle diameter and overall bore diameter.

Porsche sells two bore sizes of squirters (6.0mm and 6.6mm diameter), but apparently some 3.0 cases have an intermediate size squirter installed (mine were 6.27mm). If you have the intermediate size, you will need to drill out the case bore to accept the larger, 6.6mm squirter. I used a letter size "F" drill to do this. Nerve racking, but not difficult.


Discussion of piston squirters here and here. Good information, but occasionally sidetracked by various issues.

Did you ever get any satisfaction from Taormina Racing?

['78 SC]

Originally Posted by Jonny042

Did you ever get any satisfaction from Taormina Racing?

Yes. Ultimately Adam did ship the parts. He also worked closely with me to resolve some QC issues and spent considerable time discussing the product with me.

I'm still in the process of building the motor so I don't have any feedback on product performance. My primary reason for using his product was the ability to open up and clean them thoroughly.

[Jonny042]

Originally Posted by '78 SC

Yes. Ultimately Adam did ship the parts. He also worked closely with me to resolve some QC issues and spent considerable time discussing the product with me.

I'm still in the process of building the motor so I don't have any feedback on product performance. My primary reason for using his product was the ability to open up and clean them thoroughly.

Thanks for that! I got the impression it was an unresolved issue from reading the other threads. I'm curious because his squirters are part of the plan for a future build, for the exact reason you state.

[Evan Fullerton]

Be wary ordering anything from Taormina Racing. He never shipped or refunded my oil filter console delete order and has not returned any money or communication to those that ordered cases.

[Steve G]

Going off subject here....
Does anyone actually know for sure that the turbo and the SC squirters are the same outside diameter?

['78 SC]

Originally Posted by Steve G

Going off subject here....
Does anyone actually know for sure that the turbo and the SC squirters are the same outside diameter?

NOTE: see observations below about measured size of new squirters; the comments here are 6.0 mm may be erroneous

There are two part numbers for turbos:
930 101 015 00
930 101 015 50
The latter one shows up on Pelican as "oversize". Presumably both have the same large orifice, and the oversize refers to the barrel diameter (6.6mm instead of 6.0mm).

I found similar 911 part numbers:
911 101 011 01
911 101 011 51
The latter appears as "oversize".

As discussed in the links I gave above, you may have 6.27mm squirters (neither 6.0 nor 6.6mm) and need to drill the bores to accept the oversize 6.6 mm squirters.

[Steve G]

Originally Posted by '78 SC

There are two part numbers for turbos:
930 101 015 00
930 101 015 50
The latter one shows up on Pelican as "oversize". Presumably both have the same large orifice, and the oversize refers to the barrel diameter (6.6mm instead of 6.0mm).

I found similar 911 part numbers:
911 101 011 01
911 101 011 51
The latter appears as "oversize".

As discussed in the links I gave above, you may have 6.27mm squirters (neither 6.0 nor 6.6mm) and need to drill the bores to accept the oversize 6.6 mm squirters.

Thanks for the P/N's.
I'm sure i've seen a picture of someone measuring a new one at 6.27mm somewhere on a thread.
I just have trouble believing that for some reason Porsche made these holes too large.....then custom manufactured squirters.....then didn't ever offer them as a spare part.
Also i don't want to order six of the wrong size.....they're not that cheap!!!
I will pull mine next week to see what size they are. If i have to ream them up it's not a problem, just doesn't smell right.

[Steve G]

Here it is

911-101-011-01-

Oem

[Steve G]

That p/n (911-101-011-01) is the nominal p/n and it measures 6.25mm ( or there about ), in all the posts i've seen the only mention of 6mm come from the engine-case fella Catforce.

I have access to proper test bore micrometer's so we'll see for sure.

It would be interesting if anyone reading has any of the other p/n's maybe they could measure the outside diameters and put this one to bed.

[dannobee]

How did you test the ones that are still in the case? It's not easy to test the three in one side of the case, you need to plug some holes.

The vast majority of them just need cleaning (while in situ) to make serviceable. Did the engine suffer bearing damage or something?

[Jonny042]

Originally Posted by Evan Fullerton

Be wary ordering anything from Taormina Racing. He never shipped or refunded my oil filter console delete order and has not returned any money or communication to those that ordered cases.

Well, it may be off topic, but certainly good to know..... thanks.

[Steve G]

Originally Posted by Jonny042

Well, it may be off topic, but certainly good to know..... thanks.

Agreed.......don't want to see anyone getting ripped off!

[Steve G]

Well i had all six out today in about an hour total.
Super easy job, M5 tap was an absolute waste of time. Dremel, little tickle with the blow torch, self-tapping screw and a slide hammer......out they come

And the results are......... 6.24mm the valve



And the hole...6.285mm .......ish




Unless you're an animal there is no way you should damage the hole and require oversize valves!!