Stack 430 Tachometer with Bosch CDI 6 pin

[manu72S]

Hello

Is it possible to use Stack 430 as tachometer with a 6 pin CDI box ( Bosch 004) ?

I have wired TD pin directly to orange Stack wire but the needle didn't move at all. The orginal tachometer was useable without any problem.

Thanks for your help

[porschetub]

Originally Posted by manu72S

Hello

Is it possible to use Stack 430 as tachometer with a 6 pin CDI box ( Bosch 004) ?

I have wired TD pin directly to orange Stack wire but the needle didn't move at all. The orginal tachometer was useable without any problem.

Thanks for your help

Have you a selector on the back of the tacho for 4,6,8 cyl options,is that set right?if it is you will then most likely need to buy a tach adaptor,our host sells one.
My understanding is the factory VDO tachs are matched to the engine/ignition of that year car,most modern tachs have that adaption in the selector,don't know about your brand however.

[manu72S]

Hi
Thanks for your reply

No adapter

My tachometer ( 911 641 301 03) is totally functional with the Bosch 6 pin CDI ( 0 227 300 004). But when I put my Stack there is no needle movement.

I can say : my Stack tachometer is functional with Bosch 3 pin CDI ( 0 227 200 001 ) too.

?

[Nicke N]

Lifts an old throad.....
I have the same problem..I have a Stack 430 and 2x6 pins boxes.With the black/Purple to the Orange lead it dosent work.Also try,by suggestion to put aST697 speed pulse sensor to the coil,but I think I "burn" it...So the Q is.....Anybody using Stack on a Porsche.How do you connect it..?

[manu72S]

Hi
3 pins and 8 pins boxes there is no problem with Stack
For 6 pins you need to modify it ( diode D8)
Manu

[Nicke N]

Thanks for answer.Did you mean to modify the CDI-box....?

[Jonny H]

Originally Posted by manu72S

Hi
Thanks for your reply

No adapter

My tachometer ( 911 641 301 03) is totally functional with the Bosch 6 pin CDI ( 0 227 300 004). But when I put my Stack there is no needle movement.

I can say : my Stack tachometer is functional with Bosch 3 pin CDI ( 0 227 200 001 ) too.

?

3 pin CDI boxes do not have a tacho drive. On 69/70 cars the tacho is driven from the coil voltage (400V). Up to the last 3 pin cars (1976) the tacho is driven from the points.

[AndrewCologne]

Seems that Stack needs a 0v/12v switching pulse width signal as stated by Gerberding:
https://www.911-hkz.de/TDSignal.htm

Furter below you can see the Stack regarding part.
Its german but todays google translator output is quite ok.

BR

[Nicke N]

..Thanks..