10 replies to this topic

[tb205gti]

Does anyone have a collection of the standard ignition curves for 25d and 45d distributors?

 

..I'm looking for a curve for a 25d 40849 B - 563

 

And for a 41257E

Edited by tb205gti, 17 September 2019 - 12:39 PM.

[unburntfuelinthemorning]

I'd be interested to see these too, and the curves for modern replacements.

[tb205gti]

Seems I *might* have found some data.

 

998 running much more advancement, than a 1275 - and the 998 Cooper even more than a standard 998.

I guess an Aldon Yellow is a no-go on a 998 then :)

 

[unburntfuelinthemorning]

Where d'ya get that from?

[gaspen]

Is that the engine rpm or distributor rpm ?

[unburntfuelinthemorning]

That is the distributor rpm.

[Dusky]

I posted a pdf a while ago. I'll see if I can find it again, or maybe some good soul has saved it.

[Dusky]

https://www.google.c...T0NCkQ0QZMNLl14

Edited by Dusky, 18 September 2019 - 06:20 AM.

[tb205gti]

That is the distributor rpm.

 

engine rpm.

[unburntfuelinthemorning]

 

That is the distributor rpm.

 

engine rpm.

 

Silly me you are quite correct.  It's engine rpm and distributor degrees.

[carbon]

Does anyone have a collection of the standard ignition curves for 25d and 45d distributors?

 

..I'm looking for a curve for a 25d 40849 B - 563

 

And for a 41257E

40849B, all as distributor rpm

No advance below 100

0.5 - 2.5 @ 400

8 - 10 @ 1250

15 - 17 @ 3200

Vacuum can = ?

 

41257A all as distributor rpm

No advance below 150

0 - 1.5 @ 400

5.5 - 7.5 @ 1400

9 - 11 @ 2500

Vacuum can = 3/10/10