350 SLC 1972 troubleshooting

And by the way:

I have another website only for MB 107: sternzeit-107.de with 300 technical articles (mostly in German) and even an English section.

I have a 0 231 402 008 distributor (TFUD8).



As asked here jetronic.org/en/forum/ignition/997-do-yo...31402008-distributor

It is the same as the 0 231 402 001.

So you should set the following timing : 34° @ 3000 rpm without vacuum

And verify the good behaviour of the distributor with the following measurment :
+-2° @ idle (750 rpm) with vacuum
between 16° and 20° @ 1500 rpm with vacuum
34° à 3000 rpm with vacuum




I do not have the contact points anymore.
It was changed for an electronic system.
So i assume the dwell adjusment is now irrelevent.



I have made several timing adjusment yesterday and they are not verifying the factory values.
I'll get a summary of my test soon.

I have just check my dwell angle.

It shows 22.1°. Instead of 30-34°.

When I purchase the car the ignition was not wired correctly.
The engine was working but the rev counter not.
The transistorized module was bypassed.



Some resistor where not plugged.



I have modified the wiring according to this diagram for electronic contact.





Now the rev counter is working fine.

I have check again my ignition timing today.


Try 1:
Set the timing to 34° @ 3000 rpm without vacuum.
@ 1500 rpm the timing is 21° with vacuum (21 ° without vacuum)
@ idle (750 rpm) the timing is 19° with vacuum (8° without vacuum)
@3000 rpm with vacuum is 34°
With this setting the engine is lazy above 5000 rpm and do not get above 6000 rpm


Try 2:
Added some more advance by turning the distributor counter clockwise.
The engine is getting at 6000 rpm with no problem.
The idle is a little bit more rough.

@3000 rpm the timing is 38° with or without vacumm
@idle (750 rpm) the timing is 23° with vacuum (13° without)
@ 1500 rpm the timing is 26° with or without vacuum.


The behavior of my distributor is strange.
May be it is related to the two vacuums pipes of my distributor.
One is not plugged.

Hi,
did you try to remove the cap the inner vacuum pipe is sealed with?

Maybe this makes a difference.

Regards
Norbert