Part number for the barometric compensator

[Berggreen]

Hello all

I have been searching around to find the part number for the barometric compensator, but without any result. I guess because the entire FIP is a Bosch part (?).

Do you know what part number it has? And do you know of a place online to buy a new or renovated unit?

It must fit onto a R24Y FIP.

Also, what shims do you recommend to put under the barometric compensator to adjust the full-range fuel/air mixture? Do you have some examples of where to buy them?

Thanks a lot! 

Cheers,

Christian

[WRe]

Hi,
sorry but I couldn't find any part number too.

Did you test your altitude compensator?
https://www.sl113.org/wiki/Engine/AltitudeCompensator

Usually you need a FIP test bench to adjust this compensator. Alternatively you can try it like here but it's a makeshift only:
http://w113.eu/geschlossen/Reparaturen/Pagode%20W113%20Motor%20macht%20Probleme.htm with shims
https://www.amazon.de/Ausgleichscheiben-Variomatik-Stage6-Variocontrol-0-4-1-0mm/dp/B00910F1UE.

You should contact these guys and ask for a solution:
- https://classic-manufactur-goslar.de/
- https://www.oldtimer-technik.eu/
Both are recommended by German Pagoda forum Pagodentreff.de.

...WRe

[Benz Dr.]

I would think that there would be plenty of used ones around. No way to know easily if they're functional but I'm under the impression that they don't fail often. I live in an area that has no significant elevation changes so they always work around here.

[Pawel66]

I think it is Bosch No. 1 427 232 003 (Druckdose). Same for R24 and R25.

[Berggreen]

I think it is Bosch No. 1 427 232 003 (Druckdose). Same for R24 and R25.

Great, thank you - you are a champ! 

But I see by searching on the part number that it is not something you can easily get your hands on. Don't seem to pop up anywhere.

In any case, I have not really tested the one I have, and it sort of looks ok from the measurements in the manual. But if a new one was cheap and easy to get, I would have just replaced it to be sure it works.

How much shims do you have under your barometric compensator?

When I took mine off, I found one shim of 2 mm and another one of 0.1 mm, so in total 2.1 mm.

Thanx,

Christian 

[Berggreen]

Hi,
sorry but I couldn't find any part number too.

Did you test your altitude compensator?
https://www.sl113.org/wiki/Engine/AltitudeCompensator

Usually you need a FIP test bench to adjust this compensator. Alternatively you can try it like here but it's a makeshift only:
http://w113.eu/geschlossen/Reparaturen/Pagode%20W113%20Motor%20macht%20Probleme.htm with shims
https://www.amazon.de/Ausgleichscheiben-Variomatik-Stage6-Variocontrol-0-4-1-0mm/dp/B00910F1UE.

You should contact these guys and ask for a solution:
- https://classic-manufactur-goslar.de/
- https://www.oldtimer-technik.eu/
Both are recommended by German Pagoda forum Pagodentreff.de.

...WRe

Thanks a lot for all the nice links - time to polish my German!

[Pawel66]

Great, thank you - you are a champ! 

But I see by searching on the part number that it is not something you can easily get your hands on. Don't seem to pop up anywhere.

How much shims do you have under your barometric compensator?

When I took mine off, I found one shim of 2 mm and another one of 0.1 mm, so in total 2.1 mm.

Thanx,

Christian 

I think it is very difficult to get one of these. Maybe e-bay.

I started with 2mm of shims under BC.

[stickandrudderman]

Testing it is easy:
https://www.youtube.com/watch?v=WjFQSocAGt4

[JamesL]

Testing it is easy:
https://www.youtube.com/watch?v=WjFQSocAGt4

Take one mountain...

[stickandrudderman]

It's a common mis-perception James, that the barometric compensator is about altitude. It is not; it is about atmospheric pressure.
Atmospheric pressure is constantly changing, even if you car never leaves the driveway, this compensator ensures that the amount of fuel delivered is correct for any given moment in accordance with ambient conditions, not any different location/altitude.

[JamesL]

Thanks - I didn't know that. Though I guess the clue is in the name I figured it was altitude related

[Berggreen]

It's a common mis-perception James, that the barometric compensator is about altitude. It is not; it is about atmospheric pressure.
Atmospheric pressure is constantly changing, even if you car never leaves the driveway, this compensator ensures that the amount of fuel delivered is correct for any given moment in accordance with ambient conditions, not any different location/altitude.

Good point, but I guess you can say that it will adjust the mixture at all circumstances, including both due to ambient pressure differences, as well as driving the car at higher/lower altitudes, where the pressure conditions are also different.

With that (I guess?) leads also that if you use shims under your barometric compensator to adjust the full-range fuel mixture, you should do these adjustments, where you most drive the car and under normal ambient pressure conditions. The barometric compensator will then compensate, when the conditions vary from the base conditions under which you did the basic mixture adjustments.

Cheers,

Christian

[stickandrudderman]

Good point, but I guess you can say that it will adjust the mixture at all circumstances, including both due to ambient pressure differences, as well as driving the car at higher/lower altitudes, where the pressure conditions are also different.

Christian

Pressure decreases with altitude. A change in pressure equals a change in fuel quantity delivered.

[Berggreen]

Pressure decreases with altitude. A change in pressure equals a change in fuel quantity delivered.

Exactly!