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Search: Posts Made By: 914efi
Forum: Porsche 911 Technical Forum 09-11-2019, 01:14 PM
Replies: 8
Views: 704
Posted By 914efi
Low-rent WUR diaphragm replacement

Low-rent being relative---

I made new diaphragms from 1/64" 70 durometer neoprene from McMaster-Carr. Using our laser cutter, I cut both types as shown. This could be done with an x-acto knife.
...
Forum: Porsche 911 Technical Forum 02-11-2019, 09:10 AM
Replies: 1,100
Views: 106,313
Posted By 914efi
Still here, took the 911 out for a spin Saturday...

Still here, took the 911 out for a spin Saturday afternoon.
Forum: Porsche 911 Technical Forum 09-17-2018, 11:19 AM
Replies: 18
Views: 755
Posted By 914efi
I did it very easily on my '75 by buying the...

I did it very easily on my '75 by buying the manual winder parts. On my car they bolted right in.
Forum: Porsche 911 Technical Forum 03-29-2018, 05:46 AM
Replies: 31
Views: 1,903
Posted By 914efi
I did exactly this, replaced synchros and sliders...

I did exactly this, replaced synchros and sliders but no bearings since the trans was quiet. Bearings can be done later if needed since the hard work is the gear stuff anyway. I have some tools I...
Forum: Porsche 911 Technical Forum 03-01-2018, 08:20 AM
Replies: 17
Views: 736
Posted By 914efi
You are right about the 'fake' science being...

You are right about the 'fake' science being everywhere. You need to read between the lines in many cases.

I doubt it makes a real world difference but it is a step in the right direction to have...
Forum: Porsche 911 Technical Forum 03-01-2018, 06:24 AM
Replies: 17
Views: 736
Posted By 914efi
I would use them. They don't dissipate heat, they...

I would use them. They don't dissipate heat, they reduce heating of the intake by the heads.

Is it just the photo or is the bore of the manifold very rough? Also the sealing surface looks not very...
Forum: Porsche 911 Technical Forum 02-21-2018, 08:39 AM
Replies: 37
Views: 1,266
Posted By 914efi
I found a broken very fine wire in the resistance...

I found a broken very fine wire in the resistance track on my in-tank sender. I was able to resolder it. I used a microscope to see and fix it.
Forum: Porsche 911 Technical Forum 01-16-2018, 07:53 AM
Replies: 22
Views: 1,208
Posted By 914efi
Are your bearings known to be bad? My trans was...

Are your bearings known to be bad? My trans was quiet but rough shifting, I just did the 1-4 synchros and sliders and all is well. I didn't even upset the R&P, no need, especially since this is a...
Forum: Porsche Marketplace Discussion 08-07-2017, 12:36 PM
Replies: 21
Views: 1,350
Posted By 914efi
Read about cobalt needed for EVs: ...

Read about cobalt needed for EVs:

https://techcrunch.com/2017/01/01/no-cobalt-no-tesla/

This leaves out the need for more mining of copper which is also controversial, see Pebble Bay mine. Was...
Forum: Porsche 911 Technical Forum 02-07-2017, 05:20 AM
Replies: 9
Views: 639
Posted By 914efi
I bought some years ago and noticed that they are...

I bought some years ago and noticed that they are shorter than others I have seen pictured. I assumed the aftermarket vendor I found was not quite correct so keep an eye out for that if it is...
Forum: Porsche 911 Technical Forum 11-30-2016, 09:36 AM
Replies: 0
Views: 179
Posted By 914efi
'75 vs '79 oil temp sender resistance?

Anybody know these values? I was hoping to put a resistor in parallel with my '79 [SC] sender in my '75 chassis.

My oil temp reads low with the SC engine swap so that sender resistance is too high...
Forum: Porsche 911 Technical Forum 11-23-2016, 06:31 AM
Replies: 11
Views: 909
Posted By 914efi
My CIS 911 3.0 has better response than my EFI...

My CIS 911 3.0 has better response than my EFI 944...

911 has a lighter flywheel for sure, but the broad-brush maligning of CIS is incorrect in my opinion. Properly tuned it is quite good as the...
Forum: Porsche 911 Technical Forum 11-21-2016, 11:21 AM
Replies: 94
Views: 7,333
Posted By 914efi
I removed the 3 heads and cam housing all...

I removed the 3 heads and cam housing all together, saves a lot of time if you don't need to get into those parts.

Pistons can be slid out of cylinders far enough to remove the pins and then you...
Forum: Porsche 911 Technical Forum 11-17-2016, 05:44 AM
Replies: 1
Views: 358
Posted By 914efi
My oil temp gauge repair

In 15 years of ownership my oil temperature gauge never worked. I tested enough to know it was the gauge. In fiddling with it I saw motion, so it was something intermittant.

I took the back plate...
Forum: Porsche 911 Technical Forum 09-28-2016, 12:57 PM
Replies: 22
Views: 1,400
Posted By 914efi
AAV, Aux Air Valve, maybe my term is different,...

AAV, Aux Air Valve, maybe my term is different, same item.

Yes, you have higher control pressure when warm as the WUR valve closes when the bimetallic strip forces it closed as it warms up. When...
Forum: Porsche 911 Technical Forum 09-28-2016, 10:46 AM
Replies: 22
Views: 1,400
Posted By 914efi
If your cold control pressure is too high it may...

If your cold control pressure is too high it may be too high when hot also and will be hard[er] to start hot, they are related.

Vacuum leaks will also be a larger proportion of airflow when hot....
Forum: Porsche 924/944/968 Technical Forum 08-03-2016, 09:03 AM
Replies: 6
Views: 361
Posted By 914efi
You are right, I told them 'water pump to heater...

You are right, I told them 'water pump to heater pipe', they just didn't look close enough at the possibilities I guess. Live and learn...
Forum: Porsche 924/944/968 Technical Forum 08-03-2016, 05:49 AM
Replies: 6
Views: 361
Posted By 914efi
It is entirely possible I got the wrong part,...

It is entirely possible I got the wrong part, especially if there is a correct version.

I tried the lower hose last night, about 2" to long. Are there different versions for those? I see different...
Forum: Porsche 924/944/968 Technical Forum 08-02-2016, 05:25 AM
Replies: 6
Views: 361
Posted By 914efi
URO heater WP elbow-no go for me

Anybody try the URO heater pipe elbows that go from the WP to the metal pipe under the cam cover?

I bought one locally and was skeptical due to both ends being the same size, it would not fit on...
Forum: Porsche 924/944/968 Technical Forum 07-29-2016, 07:52 AM
Replies: 1
Views: 254
Posted By 914efi
Never Sieze on water pump bolts?

I read on an old post here that this was not advisable but the reason was not clear. It seemed that its lubricating effect made it too easy to over torque the small bolts in aluminum.

Is this the...
Forum: Porsche 924/944/968 Technical Forum 07-29-2016, 07:51 AM
Replies: 4
Views: 341
Posted By 914efi
Just realized I had meant this to go in the 944...

Just realized I had meant this to go in the 944 forum! I guess 911s have the same situation now though!

944 WPs have pretty small dia, long bolts [10mm heads] that can snap if they are frozen.
Forum: Porsche 924/944/968 Technical Forum 07-29-2016, 05:54 AM
Replies: 4
Views: 341
Posted By 914efi
Never Sieze on water pump bolts?

I read on an old post here that this was not advisable but the reason was not clear. It seemed that its lubricating effect made it too easy to over torque the small bolts in aluminum.

Is this the...
Forum: Porsche 911 Technical Forum 06-15-2016, 09:08 AM
Replies: 3
Views: 283
Posted By 914efi
Thanks. Maybe I did not read carefully enough, I...

Thanks. Maybe I did not read carefully enough, I thought the simple style had 2 versions.
Forum: Porsche 911 Technical Forum 06-15-2016, 07:58 AM
Replies: 3
Views: 283
Posted By 914efi
Pilot bearing p/n for 1979

I have a '79 SC engine for which the flywheel may not be the original.

Can anybody tell me the differences in the bearing? PP lists 2 p/ns with an engine # cutoff but I'm not sure if my flywheel...
Forum: Porsche 911 Technical Forum 01-10-2016, 04:08 PM
Replies: 4
Views: 336
Posted By 914efi
Got it, I has the reverse shift rod still in, the...

Got it, I has the reverse shift rod still in, the was mixing up the detents suggested earlier.
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