Motortester oscilloscope analysis

deQuincey

deQuincey

Quousque tandem...?
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i think that to better search this issue it is correct to start a thread on it, so here i go




yes, i have found a Bosch motortester + oscilloscope + vacuum tester, it has been sort of a barn find, but in really good condition (thanks to stevehose to start the infection (i was terribly envious, he made me think that it was posible...))



funny name "compact" test,...if this is the "compact" versión, wait to see the standard one, :roll:








i will have to study the books, and check how they work, but they seem to be in pretty good condition, despite the workshop said that they were not in use for more than ten years...just before removing them and transporting to my garage we checked the power on, and they were alive, but now i want to check all the connections before switching them on again
 
rearranged the cables



nice arrangement to work in the engine, it provides me with a dedicated light



yes, i did not check the equipment yet, i need to replace two of the power clamps, but i am very happy with the result
 
as a general obvservation, the motortester works fine, with only a little problem to be solved

less than 30 seconds to plug in the four main clamps, and the capacitor clamp, and the inductive clamp (unfortunately this one does not work), switch it on, and start the engine,

it gives you an diagnosis overview in less than 2 minutes

primary and secondary curve: you can see if the main elements of the ignition system are ok, icluding coil, distributor, condenser, plugs, cables, resistor, points,...

this is the secondary, but ovelapping the six cylinders, this one is excellent to see double images that mean differences



general overview of the six cylinders: you can see how equilibrated are all of them, and in between them



this view allows you to see cylinders separated, represented in firing order



i am still missing dwell, and comparison between cylinders, that need the inductive clamp in working order,....:-(
 
one doubt solved: this was the primary : i missed the reason for the gap marked in red




it seems that the voltage difference is correct and normal depending on systems, see here a normal oscillogram:



[/quote]
 
and the second doubt probably too, but there is a fault: remember the Sharp Little jump marked in red



so in the blue manuals i found it:




as points are new i will check the condenser and will see
 
DQ: I don´t normally recommend any deviations from stock.
But in the case of points I seriously and wholeheartedly recommend an upgrade to any kind of electronic replacement.
The Pertronix Ignitor works very welll for me and has been doing so for years and more miles than car and driver care to remember. Cheap, unintrusive, easy to install and only replaces the one thing that is notoriously problematic, the points and condenser.

Points were outdated when the E9 was new and today they are additionally problematic for the lack of availablity of high quality parts. The M30 has proven to be capable of galactic mileages and sticking to points means not only a lot more work on keeping them to scratch but also due to wear less time for the engine to run in its sweet spot.

The only downside to not haveing points would be one less function for your magnificent test machine to diagnose.
 
And Pertronix would eliminate both the red and blue areas of concern. But he knows that :mrgreen:

When I had Pertronix I kept the capacitor (unwired) to maintain stock appearance.

Tierfreund said:
DQ: I don´t normally recommend any deviations from stock.
But in the case of points I seriously and wholeheartedly recommend an upgrade to any kind of electronic replacement.
The Pertronix Ignitor works very welll for me and has been doing so for years and more miles than car and driver care to remember. Cheap, unintrusive, easy to install and only replaces the one thing that is notoriously problematic, the points and condenser.

Points were outdated when the E9 was new and today they are additionally problematic for the lack of availablity of high quality parts. The M30 has proven to be capable of galactic mileages and sticking to points means not only a lot more work on keeping them to scratch but also due to wear less time for the engine to run in its sweet spot.

The only downside to not haveing points would be one less function for your magnificent test machine to diagnose.
Click to expand...
 
Dear Tier and Steve, thank you for all your wise advices,..., Steve: "But he knows that :mrgreen:", right on the spot !

...i insisted in chemical photography for years,...it is my nature, answered the scorpion,..;-)
 
a gastester

with the help of one real friend i got this from holland,...

a CO %vol gastester:

voila:






first settings, set to zero



sensitivity settings, must be between 3 and 4




it has a long hose and a exhaust probe, then some filters and a reservoir for condensed wáter

a suction pump, and a laser burner

first check of the exhaust, is out of range (must be 3-4%)





complete setup of the motortester


 
i added a detail to the elements that are need to tune the engine

you can see here the setup, there is a cardboard to cover the front carb from air comming from the fan



coming from the head tube i use this hose that is able to disipate the fumes that come from the head when sinchronizing the carbs, but i have added a detail, by means of a T i can now connect the vaccuum hose instead of capping it as before


the synchronizing process is now much more accurate
 
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excellent as per normal. I'm envious of your skills as I'm still learning. I'm just thankful that you and others are on this board sharing what you know
 
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