heinrich

Marc I think Doug has added value here, and you too. I thank you both. Were it not for Doug, we might be confused as to whether cracking pressure was 3 or 4 bar. To me, the point is that we ALL have small memory lapses, such as mine above that I thought there were 2 squirters per cyl, when we see there was only 1. So, without throwing stones, I feel that the question about your technical resources was warranted, and I think BECAUSE you participated, we now have empirical certainty. Just viewing it impartially.

Lizard928

nice 1 marc,

Gretch

Marc, fwiw from the bleachers.........

You may add value here, but your bedside manner leaves a lot to be desired. Especially since you are a sponsor here representing a business.............You must be pretty good at what you do to be able to behave so rudely and still run a business.......

Jeeze man, lighten up will ya........

heinrich

Let's get back to technical info. So, anyone with a post-87 car have these?

Fastest928

Sorry Gretch,
You are right, I "may" add value here, maybe not. ...BTW, who do I have to ask if I add value to the 928 community or not?

Heinrich, thanks for the comments...

Doug, it is obvious that you do not have the two books that I possess. But do have the one I am missing...good for you and thanks for the correction on the cracking pressure, and the "setup"....and what about the pressure gauge?

Marc

atb

I guess I should also add that my block is an M28/42 (A/T block), with the previously stated Block #81 H 6045. (Maybe obvious by the >5000 block number)

So is it possible that they deleted the sprayers on the 5 speed cars at engine number #81H00677, but kept running them in the A/T's to run out the production inventory?

Doug Hillary

Hi
Marc@DEVEK - thank you for the extra information that is all I asked for and it is for the benefit of all RENNLIST participants!

Your manner does leave an awful lot to be desired. You are rude - very rude and in dealing with my posts over the last year one does wonder why I even bother to participate here at all
If you go back to the GTS oil consumption etc. issues of 8-10 months ago and others since your attempted public character assassination of me becomes absolute
You have become very personal doubting my background and criticised my technical knowledge, my driving style, my knowledge of lubricants and etc. and even the way we all drive in this Country ( Australia )!

And carefully read my request for more information here Marc - it was to get to the facts on when the squirters were discontinued!

I knew what the pressure was!

Your continued belligerence, intimidation and rudeness add nothing to either RENNLIST or your business!

Lizard931 - nice 1 Marc?

Oh, Marc the 100psi gauge issue. Well you said you used it when checking a racing 928 engine's oil pressure - it is all there in the Archives for others to see. No fable - just fact!

Marc, I bear no grudges - just lets deal in facts without the personal criticism

Regards

UKKid35

Oh dear, seems very reminiscent of Sean vs the Fishy guy, except you both usually have genuinely useful and helpful things to say, although not about each other.

heinrich

So. The 924 Carrera GTP, GTS and GTR were drysumped. I think, if those were drysumped, not only could the 928 be drysumped, but it MUST be drysumped. I'm thinking the oil sprayers are the deciding factor between engines that suck oil on high-G and those that do not. It's interesting to me that the valve opens at 4 bar, because my S4 is at 5 bar at cruise. So, I always have the sprayers open unless I hit the clutch.

Tom. M

This has to be taken in context.....

It is a proven fact that cruise mode for H is well above the legal limits set forth in the State of Washington., so yes.....his sprayers are always open ;-) ;-)

hee hee.

Later,
Tom
midlman@rennlist.com

87S4 that cruises at only 2000 rpm...

heinrich

Farging Bostage ;-) OK, for those that don't drive like Gramma Tom ....

Jim bailey - 928 International

Adam interesting thought ....perhaps they "wanted " to get the squirters out of the 5 speed cars first ?? maybe because they get driven more often at high RPM ? . The automatic is going to shift rather than hold high rpm for a long time ? It is normal to add squirters to high performance 911 engines even my 1968 with the 2.8 engine has squirters , boat tailed webs , shuffle pins as part of the build up . OR did Porsche decide not to bleed off some of the oil pressure so that the crank / bearings got "enough" .

heinrich

Jim I forget the numbers but that oil pump of ours is capable of busting a vein in most V8's, so I'm thinking the "bearings get enough" theory may be less of a factor than the "keep it from misting" thing ... IMHO. Not that it matters.

slate blue

I think you ask a good question there Jim with the issue on the oil to the bearings, maybe that question lies in the capacity of the pump? Could you please tell me what boat tailing is. Maybe we have different terminology?

Jim bailey - 928 International

Yes H the 928 pump is rather robust and does run at high pressure the blow off relief is at about 8 Bar . The casting of the oil passages into the upper face of the lower cradle of the block was rather innovative when the 928 engine was designed and eliminated a lot of machining/ drilling seen in many engines .