Piston Squirter Bore Size
 

I pulled the piston squirters from my case and found that the bores in the case measure 6.25-6.30mm. Is this normal?

I was expecting something closer to 6.0mm as I've read here that that is the stock size. The removed squirter bores are still in tact and they measure 6.25-6.30 suggesting a close press fit and there is some dryed sealant like loctite on them. I'm not sure if someone besides me has been into this engine before.

Is there a squirter availalble with a 6.25 outer diameter? I've read that oversize squirters are available at 6.6mm. I seem to be right inbetween the standard and oversize and not sure which way to go.

This is a 3.2 Carrera case from 1987.
Thanks.

"Catorce" on this board makes serviceable squirters. You will need to drill the hole oversize to install his 6.5 mm squirters. I've installed his, but not run the engine yet. Mine were original but also bigger than 6mm.

Thanks for the plug Ed!

Klax, here is your problem in a nutshell.

Porsche officially made TWO squirter sizes that you can buy from them.....6.0 and 6.6. No other part numbers are available.

YET, about 20% of the people that I sell squirters to have this intermediate size that measures around 6.25-6.3mm.

I have never received a satisfactory explanation as to why this is but I can tell you it is more common than you think. My best guess is that Porsche drilled a bunch of squirter holes wrong in the mid 1980s and then decided to fix them by ordering a custom bore to fill them.

The fix is pretty easy: You go to the overbore size of 6.6 which requires minor drilling. There really is no other way to avoid it.

Why couldn’t you just reuse the old ones that you took out?
Tony

Thanks guys. I’ll reach out to Catorce. I don’t think these are reusable items, I drilled away the top edge of the barrels to pull out the piston and internals and in the drilling process marked up most of the squirter holes. Also widened out the entry hole at the bottom with a screw.

Ah ok I get it. I’ve never replaced them, just blew them out.
Tony

No way to put them back in right after they are extracted due to really thin aluminum walls.

What is the price on this cleanable squirters and where to buy them?

Buy them on my site in the signature, $55 each same price as Porsche ones. thanks for your interest!

I love the idea of these and I have been trying to place an order for over two months but I get an error message when I go to the payment page.
Are these still available?

It says to call on the website.

Folks have been having a hard time getting in touch with the vendor for a few months now. Let us know if you have any success getting the squirters.

I ordered (and paid for) a set 9/5/2020 on the Taormina website.

Last response from Adam was 9/20/2020.

I'll update this when (if?) I get mine.

I have a set of the std. 6.0mm size for 911 oil pumps (not the larger 930 or larger pumps) if anybody is interested.

http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/1085172-rebuildable-oil-squirters-std-size.html

There’s also an email address directly below the phone number.
I emailed because that’s what people do in the twenty first century, especially when the person you are trying to contact is at the other side of the world.
I have had no reply, I suppose I shall have to wait for Adam to reappear.

And you still have no piston squirters.

From our host 911-101-011-01-Oem bought last month.http://forums.pelicanparts.com/uploa...1614268190.jpg

Add some retaining compound
http://forums.pelicanparts.com/uploa...1614268420.jpg

So, the new squirters are 6.25 mm, not 6.0 mm or 6.6 mm?

Did you measure the squirters you removed?

I’m just saying the ones I bought on two different occasions a few months ago all measured as shown above. I measured the bores not the actual squirter as the squirters become deformed when they are threaded for removal along with any residual retaining compound.
I think the reusable ones are NLA, I don’t think it was a profitable project as it was patented and I’m sure manufacturing wasn’t fast or cheap.

Do you know this or is it just speculation?

I recently acquired a set of "reusable" squirters and found them to be "unusable".
The idea is stellar, as is the construction but as to function....not so much.
The factory squirters are designed to open at around 40psi (if memory serves) and these open at around 3psi. A simple spring change might cure this issue but maybe the manufacturer should have considered this fact.
One caveat: I got these new (second hand) and perhaps something changed in transition?

What happen ??? Nobody responded to your email??? I told you to call and you scoffed at me with your “it’s the 21st century email comment”. Stop agonizing over piston squirters and build your motor. Paralysis through analysis. Who needs removable squirters anyway unless your racing.

Henry I read their product summary and they said their squirters open at very low psi by design. I understand the reasoning however I’m sure Porsche would have put weaker springs in their motors if they needed them.

The piston squirters are designed to cool the piston during higher rpm.
The idea is to hold as much oil pressure in the bottom end when operating at low rpm (the pump moves the lowest volume) and then opening to cool the pistons when the most heat is generated.
At 7lbs the oil light comes on. At an opening pressure less than 7lb, the check valve is non-functional.

Nothing changed in transition. What you received is as I received them. No spring change done by me. In fact the plastic ziploc bag that you received, which has the squirters and extra ball + spring in it, is the same one in which they came to me from Taormina

If not happy with them, let me know and I’ll take them back and refund you

I wasn't trying to accuse you of anything. I was just looking for a reason why these valves would be unusable as delivered.
The internet makes it so easy to criticize . I was trying not to call another manufacturers product defective without all the information.
I hope we're good?

We’re good. Just clarifying that I didn’t change anything on them or I would have said so. I too noticed the springs were rather soft but I don’t have the equipment to test them for their cracking pressure

As an aside, I do recall JB Racing has used fully open squirters in engines. Theirs are set screws with a hole drilled in them to provide the necessary precision and stream to squirt the pistons. I’m assuming their approach to this is based on the engines being run on the track exclusively. So therefore they rarely run at lower rpms for an extended time, which lessens the concern for reduced oil pressure down low

Adam notified me parts will ship this week. I'll update this when parts arrive.

Wow, this thread saved me some money. I was going to try these, but opening at less than even 20 PSI is a no go for me. As Henry said, the priority is the bearings at low RPM.

Another case of if it’s not broke don’t fix it.

Parts arrived Saturday.