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Search: Posts Made By: Jonny H
Forum: Porsche 911 Technical Forum 04-08-2021, 12:10 PM
Replies: 1,093
Views: 162,647
Posted By Jonny H
As you can see, this has worked out well for Pat...

As you can see, this has worked out well for Pat (Targa80) using the Porsche part so should be ok with this one too.

You have to be a bit careful mixing AC components. The compressor, evaporator...
Forum: Porsche 911 Technical Forum 04-08-2021, 12:01 PM
Replies: 1,093
Views: 162,647
Posted By Jonny H
^ Since Pat did such a good job at prototyping...

^ Since Pat did such a good job at prototyping and testing this setup, I have looked into getting the correct fittings to mate with the Porsche belly pan condenser and will list them on the website...
Forum: Porsche 911 Technical Forum 04-05-2021, 01:04 AM
Replies: 1,093
Views: 162,647
Posted By Jonny H
Fuse 21 (nearest the back of the car) is...

Fuse 21 (nearest the back of the car) is designated 'AC' on some cars so you can connect both the yellow and yellow/black there provided this switches off with ignition (I believe it does). The red...
Forum: Porsche 911 Technical Forum 03-27-2021, 12:54 AM
Replies: 72
Views: 13,477
Posted By Jonny H
We are easing out of restrictions, mainland...

We are easing out of restrictions, mainland Europe has bigger problems with vaccine uptake. You should be good in a month or so.

Btw, if you need AC in the Dauer, we have developed a small...
Forum: Porsche 911 Technical Forum 03-20-2021, 12:01 AM
Replies: 76
Views: 8,805
Posted By Jonny H
^ Confirmed. Thanks Dennis. Yes, the smaller...

^ Confirmed. Thanks Dennis. Yes, the smaller red wires that are crimped with the original fat red wire need separating and connecting to B+ on the new alternator.

@toddetch, yes engine tin,...
Forum: Porsche 911 Technical Forum 03-16-2021, 03:15 PM
Replies: 55
Views: 2,660
Posted By Jonny H
Here's mine. ...

Here's mine.

http://forums.pelicanparts.com/uploads26/IMG_43951615936459.jpg
Forum: Porsche 911 Technical Forum 03-15-2021, 02:17 PM
Replies: 55
Views: 2,660
Posted By Jonny H
Wikipedia - Selective Yellow "The intent of...

Wikipedia - Selective Yellow

"The intent of selective yellow is to improve vision by removing short, blue to violet wavelengths from the projected light. These wavelengths are difficult for the...
Forum: Porsche 911 Technical Forum 03-15-2021, 02:10 PM
Replies: 55
Views: 2,660
Posted By Jonny H
I run yellow lenses on my SC. Originally, I put...

I run yellow lenses on my SC. Originally, I put them on as a little French twist to go to Classic Lemans a few years ago. Then when I went out at night I could not believe the improvement so I have...
Forum: Porsche 911 Technical Forum 03-11-2021, 10:26 AM
Replies: 1,093
Views: 162,647
Posted By Jonny H
The ECU in our AC will throttle back the AC...

The ECU in our AC will throttle back the AC compressor if the alternator output is low. This can happen in traffic when engine is idling. With the high output alternator this is less likely to...
Forum: Porsche 911 Technical Forum 03-11-2021, 10:21 AM
Replies: 1
Views: 230
Posted By Jonny H
Yes, you can distribute the wires across the...

Yes, you can distribute the wires across the common bussed connections.
Forum: Porsche 911 Technical Forum 03-07-2021, 10:17 AM
Replies: 1,093
Views: 162,647
Posted By Jonny H
There are a couple of people who have done this...

There are a couple of people who have done this without AC, just to get a bit more airflow. We only sell the blower with an evaporator inside so you are carrying that around 'unused'. Yes, you can...
Forum: Porsche 911 Technical Forum 03-06-2021, 10:00 AM
Replies: 18
Views: 622
Posted By Jonny H
The puller Bisi uses at 7.45 looks too big to be...

The puller Bisi uses at 7.45 looks too big to be resting on the bearing inner race. If if rests on the back of the swing arm, he was very lucky not to have put force on the inner race and damaged...
Forum: Porsche 911 Technical Forum 03-01-2021, 11:16 AM
Replies: 11
Views: 494
Posted By Jonny H
See here: https://youtu.be/GK-gD9_gziU

See here: https://youtu.be/GK-gD9_gziU
Forum: Porsche 911 Technical Forum 02-28-2021, 01:06 PM
Replies: 11
Views: 494
Posted By Jonny H
Not quite... The distributor turns at half...

Not quite...

The distributor turns at half the engine speed so 35 degrees on the engine crank is only 17.5 degrees at the distributor. The rotor does not move that far - typically about 5mm for...
Forum: Porsche 911 Technical Forum 02-28-2021, 11:35 AM
Replies: 11
Views: 494
Posted By Jonny H
True. We have honed our own prediction scheme. ...

True. We have honed our own prediction scheme. Without a trigger wheel, you only have 3 reference pulses per crank so acceleration comes into play.

Well known prediction scheme described here:...
Forum: 911 Engine Rebuilding Forum 02-28-2021, 11:28 AM
Replies: 226
Views: 9,225
Posted By Jonny H
^ yeah, not sure what I've stepped into here. ...

^ yeah, not sure what I've stepped into here. Just trying to offer an EE perspective. Gonna duck out for a bit.
Forum: 911 Engine Rebuilding Forum 02-28-2021, 11:02 AM
Replies: 226
Views: 9,225
Posted By Jonny H
Sorry, I should have said 'some' MSD boxes are...

Sorry, I should have said 'some' MSD boxes are not regulated.

On that topic, here's a video I made some time ago showing how a Bosch CDI coil voltage varies with battery voltage and also RPM:
...
Forum: Porsche 911 Technical Forum 02-28-2021, 10:36 AM
Replies: 11
Views: 494
Posted By Jonny H
^^ Yes and yes.

^^ Yes and yes.
Forum: 911 Engine Rebuilding Forum 02-28-2021, 07:21 AM
Replies: 226
Views: 9,225
Posted By Jonny H
Yes. The MSD box does not have a regulated...

Yes. The MSD box does not have a regulated power supply so 18v will raise the HV voltage to around 800v. The only reason you might need that much voltage is for very high cylinder pressure.
...
Forum: 911 Engine Rebuilding Forum 02-28-2021, 04:23 AM
Replies: 226
Views: 9,225
Posted By Jonny H
You need two Bosch CDIs because the energy would...

You need two Bosch CDIs because the energy would not be enough to drive two coils. I thought I'd made that point.

Redundancy certainly isn't the 'main' reason. The twin plug was conceived for...
Forum: Porsche 911 Technical Forum 02-28-2021, 03:48 AM
Replies: 11
Views: 494
Posted By Jonny H
Example: The signal is delivered to the CDI+ 35...

Example: The signal is delivered to the CDI+ 35 degrees before TDC. If the box fires immediately, you would get 35 degrees advance. If the box 'waits' for a time equivalent to 35 degrees you...
Forum: 911 Engine Rebuilding Forum 02-27-2021, 02:35 PM
Replies: 226
Views: 9,225
Posted By Jonny H
Early ST, RSR etc used 3 Pin boxes. Not sure...

Early ST, RSR etc used 3 Pin boxes. Not sure what year the 8 Pin box came in but was on 956, 962, 935 etc. 8 Pin also on early Turbo
Forum: 911 Engine Rebuilding Forum 02-27-2021, 01:57 PM
Replies: 226
Views: 9,225
Posted By Jonny H
Yes they did. Both 3 and 6 Pin boxes drop power...

Yes they did. Both 3 and 6 Pin boxes drop power as the RPM increases. So at 6000 RPM you would be down around 50 - 60mJ per coil.

The 8 Pin boxes are 67.5mJ constant due to regulated supply...
Forum: 911 Engine Rebuilding Forum 02-27-2021, 12:01 PM
Replies: 226
Views: 9,225
Posted By Jonny H
Ok, but that is just a function of the amount of...

Ok, but that is just a function of the amount of energy stored in the coil. I’ll stick to physics, if you have a CDI unit with twice the energy of the Bosch units, it should ‘charge’ two parallel...
Forum: 911 Engine Rebuilding Forum 02-27-2021, 10:16 AM
Replies: 226
Views: 9,225
Posted By Jonny H
It says he DIDN’T test two coils spark duration. ...

It says he DIDN’T test two coils spark duration.

“ What I didn't check for, but perhaps will do another time, is check how much shorter the spark duration is with two sparks plugs firing at...
Showing results 1 to 25 of 500

 
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