piston squirter question
 

I have skirted around this q on another post but not really asked it so heres another thread. (sorry) i have pulled all of my 930 piston oil squirters and am looking to replace them but I have heard that there is a larger squirter that will give better cooling. can anyone advise me? is the larger squirter a straight swap or do you have to machine the case? and what model did the larger one come from?

Thanks,

Andy

It is either cyl 1 or 4 or both in a late model 3.6 or TT that have a larger orfice probably to equalize pressure to all squirters. I think the increase is in the order of .25 or .5 mm
Best regards

Hey Andy do you have a pic of the pistons you bought from me? I would like to show someone the coating on a porsche piston. Mine are coated but in the box at my mechanics shop:)

Thanks!

Eric Hood

hi Eric, yes I have, they were 'as is' and so a little dirty nut you can see the difference in colour Ill dig it out and send you it.

Andy

eric, i sent you an email. Can anyone else help with my squirter q?

Andy

anyone? please? go on........you know you want to........................just a little bit of info for a skinny english man...........


Andy

Andy, 993tt squirters are what you want...did you email Stephen?

gonna give him a ring in a while, thanks eric.

Can you change the piston squirter or bore them out doing a top end rebuild?

Andy, I'm interested in what you learn about the piston squirters too. Any word yet?

Yerman, I would be real carefull if you are going to attempt this and aren't going to split the case. Drilling them out causes lots of metal bits to fly around (not good for the bottom end). simply pulling them with a slide hammer is a better option if you aint going to split the case but I didn't manage to get a single one out with the slide hammer alone and on top of that problem there is still the chance of getting some bits of metal from around the squirter in the bottom end.

Andy

Hi Rob, I spoke to Stephen at Imagineauto (very very helpful) who advised me to use the 993t squirters which have a larger flow rate. the oilway needs drilling out to accept the new larger squirters. dont know by how much but im sure it will become obvious when I get my hands on some. one issue i have with them is that there is two sizes-22mm and 33mm. thats the only bit i don't get! ill let you know if I find out any more.

Andy

Thanks, Andy. I may do some research too. I'm at the stage where if I'm going to make the switch, now's the time. I'm not sure about the 22 mm or 33 mm numbers. Somewhere in my mind I believe I heard that the early 911 squirters were 1.0 mm in dia (the orifice); 930s were 1.5 mm and 993TT were 2.0 mm. But that could be complete bunk. No dimension could be 22 or 33 mm, unless the decimal point is missing. Have you checked the PET CD? That may be where I'll start. Do you get the impression that all 6 squirters are (supposed to be) the same, or is there some difference cylinder to cylinder, as stated by racing 97?

Rob, I think the 22 and 33mm dimention is for length. As for same/different size orifices-don't know. I didn't ask Stephen when I spoke (always forget to ask something!) but Im sure that if there was a need for a mixed set of squirters to equalise pressure then he would know about it. I spoke to a porsche GB tech yesterday and they are sending me a fax with some details on squirters so Ill keep you posted. let me know about what you find on the PET


Andy

Anyone familiar with the oil passage modification?

And are the 1.0-1.5-2.0 mm sizes correct as Rob stated?

Souk, Im thinking that the oil passage mod is simply a bore out to accept the new larger squirter but I may be wrong. When I spoke to Stephen (imagineauto) he was just talking about reaming out the hole and fitting the new squirter. he said that if I had managed to get the old ones out then I should be able to deal with putting the new ones in. Christ! no pressure then!

Andy

I'll have to give Stephen a call. Thanks.

Let me know how you get on Souk

Andy

Souk, did you speak to Stephen?

Andy

Andy, I was planning on a Monday call. I'll post my findings.