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Search: Posts Made By: Walt Fricke
Forum: Porsche 911 Technical Forum Yesterday, 04:36 PM
Replies: 14
Views: 458
Posted By Walt Fricke
If you hook an ammeter into the system with the...

If you hook an ammeter into the system with the ignition off, you can see the clock tick - the solenoid pulling the spring tight again. Not much current, though.

Still, batteries self discharge,...
Forum: Porsche 911 Technical Forum Yesterday, 04:33 PM
Replies: 9
Views: 120
Posted By Walt Fricke
I did this a couple of times last fall, starting...

I did this a couple of times last fall, starting at the track. Wasn't hard to drive out (but yours may have rusted in place).

I think it is a good idea, as otherwise only the circlip holds the...
Forum: 911 Engine Rebuilding Forum Yesterday, 03:37 PM
Replies: 20
Views: 529
Posted By Walt Fricke
A bit crude, but you could add a washer. ...

A bit crude, but you could add a washer.

Spark plug washers have some mystery to them. Some authorities say you should use new washers each time you have the plugs out. The regular plug washer...
Forum: Porsche 911 Technical Forum 01-22-2021, 07:53 PM
Replies: 17
Views: 811
Posted By Walt Fricke
My assumption is that forging is done with a die...

My assumption is that forging is done with a die of some sort. Not like the guys on TV making flat objects like swords with hammers on their anvils. That would lead to center marks. The forging is...
Forum: Porsche 911 Technical Forum 01-22-2021, 07:41 PM
Replies: 21
Views: 542
Posted By Walt Fricke
Great photos! Now you get to see just how...

Great photos!

Now you get to see just how good JB Weld is by gluing it all back together?
Forum: Porsche 911 Technical Forum 01-21-2021, 07:27 PM
Replies: 2
Views: 230
Posted By Walt Fricke
Good advice, Ed. You are reporting misbehavior...

Good advice, Ed. You are reporting misbehavior in a specified engine RPM range. The CIS system doesn't know, in a sense, what your RPMs are. It knows closed throttle, part throttle, and wide open...
Forum: Porsche 911 Technical Forum 01-21-2021, 07:08 PM
Replies: 17
Views: 811
Posted By Walt Fricke
Carl - to the best of my knowledge those pieces...

Carl - to the best of my knowledge those pieces are forged, not cast, steel. Where fractured they had visible grain, and looked nothing like what cast iron looks like when fractured.

Not hard...
Forum: Porsche 911 Technical Forum 01-20-2021, 02:51 PM
Replies: 6
Views: 346
Posted By Walt Fricke
Very odd situation. There isn't any reason to...

Very odd situation. There isn't any reason to remove the steering wheel often. I can't recall if the stock wheel system is keyed or not.

What caused you to have the wheel removed? That might...
Forum: Porsche 911 Technical Forum 01-20-2021, 02:47 PM
Replies: 16
Views: 397
Posted By Walt Fricke
If you have a suitable tool, like the one you'd...

If you have a suitable tool, like the one you'd use to deburr the edge of a drilled hole (small curved blade in a handle, rotates as you go around the hole), you could break the square edge of the...
Forum: 911 Engine Rebuilding Forum 01-20-2021, 02:30 PM
Replies: 2
Views: 263
Posted By Walt Fricke
As Henry notes, your '74S came (most likely) with...

As Henry notes, your '74S came (most likely) with the same header design as the SSIs. Those don't rust, and look better, but don't function better. A better functioning header costs a lot more.
Forum: 911 Engine Rebuilding Forum 01-19-2021, 10:42 PM
Replies: 44
Views: 754
Posted By Walt Fricke
I see what you are thinking. These look a lot...

I see what you are thinking. These look a lot like the coil packs used in waste spark crank fire systems - three coils for six plugs (or double that if twin plug). In a waste spark system, the...
Forum: 911 Engine Rebuilding Forum 01-19-2021, 10:22 PM
Replies: 20
Views: 529
Posted By Walt Fricke
And if, for some reason, you don't want to order...

And if, for some reason, you don't want to order (maybe you need to get the motor going tomorrow?) and use the reduced head flange nuts Henry shows, plan B is to remove the six barrel nuts which are...
Forum: 911 Engine Rebuilding Forum 01-19-2021, 10:12 PM
Replies: 10
Views: 346
Posted By Walt Fricke
Dan I've been interested in beehive springs...

Dan
I've been interested in beehive springs since I first read about them in Circle Track (RIP) years ago. The assertion is that they don't need a two spring system to deal with harmonics and...
Forum: Porsche 911 Technical Forum 01-17-2021, 05:23 PM
Replies: 21
Views: 1,908
Posted By Walt Fricke
I have an SC distributor cap where I cut off...

I have an SC distributor cap where I cut off three of the towers to make a jig for measuring cam duration. The plug wire connections are copper from one end to the other. The only way for there to...
Forum: Porsche 911 Technical Forum 01-17-2021, 04:54 PM
Replies: 13
Views: 278
Posted By Walt Fricke
Tommy - if the bushings in the pedal cluster, and...

Tommy - if the bushings in the pedal cluster, and especially the one in the arm the clevis attaches to, were worn, someone may well have shortened the cable by threading the clevis farther to the...
Forum: Porsche 911 Technical Forum 01-17-2021, 04:37 PM
Replies: 1
Views: 147
Posted By Walt Fricke
WUR differences

Tony recently noted that two WURs with different Bosch part numbers (072 and 090) are, in fact, identical. I've long wondered just what the detailed differences between one WUR model and an other...
Forum: Porsche 911 Technical Forum 01-17-2021, 12:17 AM
Replies: 4
Views: 262
Posted By Walt Fricke
CHT? But maybe the tach which didn't bounce...

CHT?

But maybe the tach which didn't bounce points to the start position of the ignition switch failing? You can replace the electrical switch part without having to remove the lock part.
Forum: 911 Engine Rebuilding Forum 01-16-2021, 04:48 PM
Replies: 8
Views: 314
Posted By Walt Fricke
So - is the area where the piston moves up and...

So - is the area where the piston moves up and down the area which looks funny? If what you are worrying about is lower down, below the lowest piston travel, it isn't going to affect oil pressure. ...
Forum: Porsche 911 Technical Forum 01-16-2021, 04:38 PM
Replies: 11
Views: 1,611
Posted By Walt Fricke
Dave - It would be nice if Porsche would release...

Dave - It would be nice if Porsche would release the schematic for the Lambda CIS ECU.

I understand the inductive spike. But why is there high frequency ringing? There are 70 pulses to the FV...
Forum: Porsche 911 Technical Forum 01-16-2021, 03:43 PM
Replies: 57
Views: 3,082
Posted By Walt Fricke
The only person I can think of who might have an...

The only person I can think of who might have an experience based guess as to what might have been wrong with your WUR is Tony. He services these things. Odd that Bosch (at least I'd suppose...
Forum: Porsche 911 Technical Forum 01-14-2021, 10:53 PM
Replies: 9
Views: 482
Posted By Walt Fricke
I have zero experience with non-adjustable sway...

I have zero experience with non-adjustable sway bars. Through the tub fronts and adjustable arm rears were the second thing I did to the car (1977 model) after my first few DEs. It has to be tough...
Forum: Porsche 911 Technical Forum 01-14-2021, 10:46 PM
Replies: 11
Views: 1,611
Posted By Walt Fricke
Jason - this discussion concerns applying...

Jason - this discussion concerns applying Poisson's Equation to the inverse of Maxwell's 3d theorem. Isn't that clear?

To get my digital scope traces I opened the mini brain and soldered pieces...
Forum: 911 Engine Rebuilding Forum 01-12-2021, 07:18 PM
Replies: 29
Views: 1,469
Posted By Walt Fricke
Rather than considering shuffle pins for the case...

Rather than considering shuffle pins for the case halves, you ought to think of bushings - tubes around the through bolts. Like what Porsche does for the #1 main bearing. There is a trick which...
Forum: 911 Engine Rebuilding Forum 01-12-2021, 06:09 PM
Replies: 8
Views: 314
Posted By Walt Fricke
What makes me think that the cylindrical hole the...

What makes me think that the cylindrical hole the pressure setting piston rides in is a steel tube cast into the case? Am I incorrectly thinking of the cast in tube in the SC which makes some...
Forum: Porsche 911 Technical Forum 01-12-2021, 05:53 PM
Replies: 74
Views: 2,031
Posted By Walt Fricke
The only time I put a jack under the sump plate...

The only time I put a jack under the sump plate is if I am removing the engine alone after the car is up and on jack stands, and leaving the engine in place. For that I made a jig which fits over...
Showing results 1 to 25 of 500

 
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