The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Fraggle on August 17, 2013, 05:10:09 AM

Title: Setting Up Carbs
Post by: Fraggle on August 17, 2013, 05:10:09 AM

I have access to a full krypton tuning bench, including the gas analyser.

Does any one now the correct values for a UK based 1980 R65 - CO. HC etc..?

Title: Re: Setting Up Carbs
Post by: georgesgiralt on August 17, 2013, 12:13:14 PM

Hello !
I've searched for an '82 and found nothing pertinent. On certain Haynes version there are some figures, but they appear and disappear between editions.
I wonder if BMW ever gave some figures ,

Title: Re: Setting Up Carbs
Post by: Barry on August 17, 2013, 04:07:12 PM

I checked the BMW workshop manual and it's not in there.
Also not in any of the factory issued service bulletins.

CO will be quite high by modern standards. My guess 3- 5 %

You might find this theoretical correlation between %CO and air/fuel ratio useful.




% CO A/F         %CO A/F         % CO A/F        % CO A/F
0.1 = 14.71       0.2 = 14.53       0.3 = 14.41       0.4 = 14.33
0.5 = 14.27       0.6 = 14.22       0.7 = 14.20       0.8 = 14.16
0.9 = 14.14       1.0 = 14.10       1.1 = 14.08       1.2 = 14.03
1.3 = 14.00       1.4 = 13.97       1.5 = 13.93       1.6 = 13.89
1.7 = 13.85       1.8 = 13.81       1.9 = 13.79       2.0 = 13.76
2.1 = 13.72       2.2 = 13.68       2.3 = 13.62       2.4 = 13.58
2.5 = 13.55       2.6 = 13.53       2.7 = 13.48       2.8 = 13.44
2.9 = 13.40       3.0 = 13.37       3.1 = 13.33       3.2 = 13.30
3.3 = 13.26       3.4 = 13.23       3.5 = 13.19       3.6 = 13.14
3.7 = 13.11       3.8 = 13.07       3.9 = 13.02       4.0 = 12.99
4.1 = 12.95       4.2 = 12.92       4.3 = 12.89       4.4 = 12.85
4.5 = 12.82       4.6 = 12.79       4.7 = 12.74       4.8 = 12.69
4.9 = 12.66       5.0 = 12.63       5.1 = 12.58       5.2 = 12.53