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Search: Posts Made By: Bob Ashlock
Forum: Porsche 911 Used Parts For Sale & Wanted 07-02-2020, 07:21 AM
Replies: 0
Views: 174
Posted By Bob Ashlock
Wanted - Bosch 3 and 6-pin CDI units

I am looking for core units to rebuild and restore. My offer price is $140 shipped. Units do not need to be functional but must be complete with no broken fins or severe corrosion issues. Thanks!
Forum: Porsche 912 Technical Forum 06-05-2020, 09:27 PM
Replies: 12
Views: 1,165
Posted By Bob Ashlock
The starter solenoid is mounted ON the starter. ...

The starter solenoid is mounted ON the starter. It is the cylinder with a winding and "plunger" that engages the starter gear to the flywheel gear teeth while simultaneously activating a contactor...
Forum: Porsche 911 Technical Forum 05-09-2020, 04:53 PM
Replies: 25
Views: 942
Posted By Bob Ashlock
Those look fantastic John!

Those look fantastic John!
Forum: Porsche 912 Technical Forum 04-25-2020, 09:26 AM
Replies: 140
Views: 16,811
Posted By Bob Ashlock
Fun license plate!

Fun license plate!
Forum: Porsche 911 Technical Forum 02-03-2020, 10:19 AM
Replies: 24
Views: 1,251
Posted By Bob Ashlock
Mucho thanks MySoCal and FrankM. It...

Mucho thanks MySoCal and FrankM.

It appears that pin 21 provides a 'sink' through 510 Ohms. Not knowing for sure what's inside the tach, but even at 12V the most current this would sink would...
Forum: Porsche 911 Technical Forum 02-03-2020, 09:05 AM
Replies: 24
Views: 1,251
Posted By Bob Ashlock
Frank, I'd love to have that Motronic schematic....

Frank, I'd love to have that Motronic schematic. Most important the tachometer output signal section! Bob@ashlocktech.com
Forum: Porsche 911 Technical Forum 02-03-2020, 07:19 AM
Replies: 24
Views: 1,251
Posted By Bob Ashlock
Interesting discussion... What would be...

Interesting discussion...

What would be really good to know is what the actual output structure design of the 3.2 ECU tach signal interface looks like. With that info, a determination could be...
Forum: Porsche 911 Used Parts For Sale & Wanted 12-13-2019, 06:33 AM
Replies: 4
Views: 257
Posted By Bob Ashlock
Second "dibs" on the coil please ... :)

Second "dibs" on the coil please ... :)
Forum: Off Topic Discussions 11-28-2019, 08:56 PM
Replies: 100
Views: 5,191
Posted By Bob Ashlock
Esses !

Esses !
Forum: Porsche 911 Used Parts For Sale & Wanted 11-18-2019, 04:19 PM
Replies: 0
Views: 163
Posted By Bob Ashlock
WTB: BOSCH CDI Units

I am on the hunt again for some dead Bosch CDI units that I can rebuild and restore. I pay $150 shipped. No broken fins or feet, or excessive corrosion.

Thanks much, Bob
Forum: Porsche 911 Technical Forum 10-27-2019, 07:45 AM
Replies: 9
Views: 799
Posted By Bob Ashlock
My thoughts/experience: The starter solenoid...

My thoughts/experience: The starter solenoid plunger 'drags' inside the barrel and binds when hot. It doesn't pull in far enough to allow the big contactors to close the circuit to the starter...
Forum: Porsche 911 Technical Forum 10-09-2019, 07:20 AM
Replies: 10
Views: 743
Posted By Bob Ashlock
This is a bit puzzling. Indulge me please. To...

This is a bit puzzling. Indulge me please. To me, I would think the zap would like to follow the easiest, shortest path. So, it seems odd that the discharge would find it easier to follow that...
Forum: Porsche 911 Technical Forum 10-07-2019, 07:22 AM
Replies: 6
Views: 653
Posted By Bob Ashlock
The earlier (up to Aug 1971) tachs require a...

The earlier (up to Aug 1971) tachs require a high-voltage pulse to trigger. For '72, the tach is triggered from the points (low voltage). So, you need an adapter to make an earlier tach work. I...
Forum: Porsche 911 Technical Forum 10-01-2019, 06:10 AM
Replies: 1
Views: 563
Posted By Bob Ashlock
First thing, you need to check for spark when...

First thing, you need to check for spark when this happens. Remove the high voltage wire from the coil tower and attach a test wire to the coil tower, other end to a spare spark plug. (Ground the...
Forum: Porsche 911 Technical Forum 07-15-2019, 07:24 AM
Replies: 17
Views: 1,291
Posted By Bob Ashlock
The sound intensity of the power converter inside...

The sound intensity of the power converter inside varies unit to unit. All in the 3.5 - 4KHz range. Sometimes it is pretty subtle, hard to hear if the fuel pump is running at the same time. If in...
Forum: Porsche 911 Technical Forum 07-04-2019, 09:01 AM
Replies: 52
Views: 2,557
Posted By Bob Ashlock
Sorry to hi-jack, but just to give a little more...

Sorry to hi-jack, but just to give a little more insight about what was described in the post above by Tony, there are 6 flat beryllium copper "tabs" that connect the actual connector to the...
Forum: Porsche 911 Technical Forum 07-02-2019, 06:31 AM
Replies: 52
Views: 2,557
Posted By Bob Ashlock
Just another data point ... you mentioned you...

Just another data point ... you mentioned you tried to measure voltage at the coil. With a CDI ignition, you will not be able to measure anything at the coil with a common voltmeter. The discharge...
Forum: Porsche 911 Technical Forum 06-24-2019, 01:06 PM
Replies: 52
Views: 2,557
Posted By Bob Ashlock
Verify the plug is secure into the CDI unit. ...

Verify the plug is secure into the CDI unit. Verify the green coax cable coming out of the distributor is not the culprit. With engine running, gently manipulate that little cable to see if the...
Forum: Porsche 911 Used Parts For Sale & Wanted 06-23-2019, 10:20 AM
Replies: 1
Views: 122
Posted By Bob Ashlock
Wanted: Bosch CDI Cores

I am always looking for BOSCH CDI cores. Dead units are just fine. No broken fins, missing parts or excessive corrosion please. I pay $160 shipped.
Forum: Porsche 911 Technical Forum 06-23-2019, 09:43 AM
Replies: 27
Views: 1,851
Posted By Bob Ashlock
Also, forgot to mention ... if you do not have...

Also, forgot to mention ... if you do not have access to a known good 6-pin CDI box, I have a test unit/loaner that I can send you to try a quick substitution. You are in the SF Bay area, so...
Forum: Porsche 911 Technical Forum 06-23-2019, 09:40 AM
Replies: 27
Views: 1,851
Posted By Bob Ashlock
If you remain suspicious of the CDI unit, please...

If you remain suspicious of the CDI unit, please email me and I will provide some bench-test instructions. I repair/restore these units and my service is available through Pelican. Also, don't...
Forum: Porsche 911 Used Parts For Sale & Wanted 06-14-2019, 05:05 AM
Replies: 7
Views: 368
Posted By Bob Ashlock
Bump! Hi all, I am still in need of Bosch 6-pin...

Bump!
Hi all, I am still in need of Bosch 6-pin units. They do not need to work, but no corrosion or broken fins please. I pay $160 shipped for these core units. Thanks, Bob
Forum: Porsche 911 Technical Forum 05-20-2019, 09:50 AM
Replies: 18
Views: 496
Posted By Bob Ashlock
Thank you all for the compliments about my...

Thank you all for the compliments about my TACH-ADAPT product. It commonly solves this problem. Pelican sells it under part number PEL-TA-V3. This product became mass-produced due to this forum!
Forum: Porsche 911 Used Parts For Sale & Wanted 05-12-2019, 12:34 PM
Replies: 2
Views: 276
Posted By Bob Ashlock
These items were sold to member Nditiz1 on...

These items were sold to member Nditiz1 on 11-07-18. Sorry for not advising they were sold sooner.
Forum: Porsche 911 Technical Forum 04-23-2019, 03:28 PM
Replies: 30
Views: 1,405
Posted By Bob Ashlock
Lovely bird poop job... but hey, I shouldn't be...

Lovely bird poop job... but hey, I shouldn't be talkin'..... I took a welding class in college. First time with the arc, stinger, hood. (Way before they had the cool LCD hoods that you can actually...
Showing results 1 to 25 of 338

 
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