Best, Safest way to clean 930 Case

[Racerbvd]

Well, we have a few engine cases, that, well need a good cleaning.









Any idea what this crank is?

[Henry Schmidt]

Media tumbling is probably the only way to save that case.

Please post the before and after, these guys do great work.

J&P Deburring
Chatsworth, CA 91311
jandpdeburring@aol.com

Phone: (818) 998-6079
Before



After

[Henry Schmidt]

You might be able to save the crank by simply bleed blasting it and having it ground under sized. We have all kinds of oversized bearings in stock.
Make sure they heat treat the crank.

[Racerbvd]

Originally Posted by Henry Schmidt

You might be able to save the crank by simply bleed blasting it and having it ground under sized. We have all kinds of oversized bearings in stock.
Make sure they heat treat the crank.

Thanks, any idea what that crank would be for?

Here’s the number of the 930 case.

[Henry Schmidt]

1978 US 911SC case.

[Henry Schmidt]

Originally Posted by Racerbvd

Any idea what this crank is?

The crank is a 2.0/2.2 counter weighted crank.
What I would do with that crank is magniflux for cracks, bead blast (Potter's AD) and grind to clean journals.
For something trick, ground the rod journals with a large radios and 996 GT3 bearing size. 52.90 mm
This allows you to run any of a number of GT3 rods, Pankl 996, Carrillo, Pauter and one of my favorites PPM GT3 rods.

[Racerbvd]

Originally Posted by Henry Schmidt

1978 US 911SC case.

Thanks, glad it is only a SC case, my friend couldn’t remember if it was the RSR case from the old Peter Gregg RSR that he owned and raced until he traded it to a 910..





Fortunately the other half of the case appears to be in good shape.

[356Lion]

Originally Posted by Racerbvd

Well, we have a few engine cases, that, well need a good cleaning. Any idea what this crank is?

Off Topic, but Cool wheels. Probably from an RSR based on your comment about getting the cases from a friend with one. I have two from an RSR (front and rear) and the wider rear one is 15 x 15 inches. I put a round glass top on it to use as a table in my office. I wonder if those wheels were also used on 917s because the part # is: 917.361.023.00. Any part numbers on your set? Careful cleaning them- they're magnesium.
John

[Racerbvd]

Originally Posted by 356Lion

Off Topic, but Cool wheels. Probably from an RSR based on your comment about getting the cases from a friend with one. I have two from an RSR (front and rear) and the wider rear one is 15 x 15 inches. I put a round glass top on it to use as a table in my office. I wonder if those wheels were also used on 917s because the part # is: 917.361.023.00. Any part numbers on your set? Careful cleaning them- they're magnesium.
John

Thanks John, I am treading lightly and carefully on cleaning the wheels (I.E. advise is very much appreciated ) because of just that, no smoking around these wheels. Also working on a single 910 wheel that once cleaned up , verify that there is no damage and document, I’ll be listing it for sale.
Thanks for posting the pictures of the part numbers, I appreciate it so I can check.
Here is one of my end tables.








You might recognize the bent one (happened at Le Mans or so I was told) but after I swapped the Fuchs centers (don’t worry, I still have the original center lock BBS centers)


When I created a joke post that started out with me saying that I was driving my stock 88 Carrera and shifted spiritedly as I came around a turn and broke the rear end lose and tagged a curb dinging the rear wheel. It went down more than half a page before someone called it out that, 1), there is no way in hell that 19” wheel would fit a stock 911.
2), there is no chance in hell that a stock 88 911 could break loose 15x19” wheels .
3) those are racing slicks, everyone knows that you can’t drive race tires on the street,as they always seem to magically attract roofing nails when you do. Those of you who have track rubber and for whatever reason, test, gas, whatever , you end up with a nail or something in a tire.

Only topped my “ conspiracy theory” on the old “Porsche List “(dang, am I really that old Joe?) when Porsche introduced the 996, that Ford has secretly bought Porsche, and used examples from the similarities between the Ford Probe, Mercury Courgar, based on the fact the Mercury used a dash very similar to the Boxter and 996, probe’s wheels, door handles and mirrors, before the996 was released,plus a few other things.
I eventually made a good case as some, after looking at the things I pointed out, thought I was correct, we know that wasn’t the case, I just pointed out and noticed some very similar parts. But again, someone “in the know “ called me out, and thinking that there was something behind it, kept asking me where I got the information, I kept telling them that it was just my observation and overacting mind,