Fuel injection trigger points

[911buff]

Does anyone have a source for new trigger points for the D-Jetronic fuel injection?. Troubleshooting has left this as the only remaining issue. I hate to throw money at a new set of points if it does not need it but without the use of an oscilloscope, I am not sure how to check for "bouncing". The 2.0 still runs a bit rich and does not accelerate as crisply as I feel it should. I remember my previous 2.0 running much better. However, I have been driving a '91 Carrera for the last six years, so I may be remembering with a little optimism.

Anyway, the points are original (I think) so there is a great chance that the blocks have worn significantly, causing bounce. So, if anyone has a line on new ones, I would appreciate the help.

Thanks!

[TheCabinetmaker]

High Performance House, redwood City CA is where I bought mine. rich the owner has a huge selection of new and used Porsche parts, a three story warehouse full of goodies and very extensive sup[ply of 914 parts along with other Porsche models.


I have found that the blocks are worn out when the taper on the tip of the block is no longer there. no taper, then it is worn out.

besure to center the trigger points in the dizzie housing, the holes for the screws are slotted, and you will get best life out of them if there are centered. you can center them on the bench with an ohm meter and adjust so that the open period for each is the same amount of degrees rotation of rotor for each. if the points are shifted to one side the open period expressed in degrees of rotation of the rotor will be different. centering them will optimize the life of the blocks.

[nordfisch]

Hi,
I'm Norbert from Germany and built a tool for re-adjusting even heavy-worn trigger-points-sets to the original values.

- You can't center the points by moving the set in the slotted screw-holes.

They are centered by the sheet-metal the points are mounted on.

It is possible to re-adjust (and re-center) them using the tool I developed.

The tool used by a 914 - owner:


I do not own a 914 by myself, therefore the photo doesn't show the actual version of the tool that allows to adjust the newer points with the plastic-hoods, too. (But the newer tool is quite similar to this one...)

You can reproduce this tool for free for non-commercial usage if you have a lathe.
I will send you a figure with the dimensions and an instruction for usage in English on request by PN.

Regards
Norbert

[911buff]

I realize this is a picture of Points from a Mercedes but it is a good reference photo. So, my question is... does anyone have the measurement between the tips on a factory fresh set of 914-4 points?

[nordfisch]

Distance 'in new' is 23,0 mm ( 0.91 in).
It is neccessary to check the centering, too.
This does the tool I show in the above picture.

Send you a figure for producing it on a lathe on request.
Ready produced tool $ 20.00, shipment included.

Regards
Norbert

[911buff]

Thanks! Adjusted the the distance and put a slight rounded edge on the "tips" and it perked up the performance a bit. It was worth the time.

[desmomini]

Originally Posted by nordfisch

Hi,
I'm Norbert from Germany and built a tool for re-adjusting even heavy-worn trigger-points-sets to the original values.

- You can't center the points by moving the set in the slotted screw-holes.

They are centered by the sheet-metal the points are mounted on.

It is possible to re-adjust (and re-center) them using the tool I developed.

The tool used by a 914 - owner:


I do not own a 914 by myself, therefore the photo doesn't show the actual version of the tool that allows to adjust the newer points with the plastic-hoods, too. (But the newer tool is quite similar to this one...)

You can reproduce this tool for free for non-commercial usage if you have a lathe.
I will send you a figure with the dimensions and an instruction for usage in English on request by PN.

Regards
Norbert

Hello! Would you please send the dimensions? Thank you so much.

jeffhillegass@hotmail.com

[dr914]

we investigated having them reproduced but it was very very costly