M60B40 with B30 DME and MAF - is it safe?

[GamblingTomato]

Hi,
I would like to know if it is technically safe to run a M60B40 engine with a M60B30 MAF and the B30 DME. I am aware that this would most likely sacrifice some power, however I only want to know if the engine would take any damage (for example due to wrong timing/leaning out etc.)

Thanks a lot!

[shogun]

Welcome here, I will move your post to the E32 forum, maybe members with these engine can comment.

[Timm]

It will not cause any damage, but the air/fuel maps will not be correct - fortunately, as it is a closed-loop system adaptations will counter these problems. If the air/fuel cannot be adapted you will get an SES light and error codes. However, there are a darn sight more 740's out there than 730's, I would have thought finding a MAF and DME for the 740i would be more obtainable...

[GamblingTomato]

Hi,
Thanks for moving to the correct sub forum and for responding.

In the Long run I’ll definitely get the proper 4.0 parts, but it wasn’t a planned swap (the timing chain on the b30 sent it to heaven) and I have a lot of private stuff to sort at the moment and just needed the car to be running again as fast as possible.
As I said, for the time being I wouldn’t mind a little less power or some error codes, I just wanted to make sure that I won’t destroy the engine by running the b30-setup until I get the time to properly finish everything up.
So thanks confirming that I won’t accidentally kill the next time engine!