Eric_Oz_S2

I'm after the specs for Siemens 55lb/hr injectors, in particular the dead time. Surely someone must ave figured this out by now. It will save a whole lot of trial and error in setting the motronic tables. Tied search, but to now avail.

Cheers

mikeyoman

Try contacting Injector Dynamics, seems they might have base line info for Bosch injectors.
http://injectordynamics.com

Eric_Oz_S2

Thanks, but I need the data for the Siemens to update the tables in the Motronic code. Looks like I'll have to use trial and error to get the best results. The Siemens seem to run low at low duty cycles and hence probably need more dead time to get more fuel at lower rpms.

Tom M'Guinn

Try these:

11 volts .824ms
12 volts .753ms
13 volts .696ms
14 volts .639ms

Eric_Oz_S2

Thanks. I settled on:
8V 12V 14V 16V
1.07 0.88 0.65 0.53

This seemed to give the best low load AFRs combined with a FQS setting of 0.55 on the S2 DME. I basically added 0.15ms to the stock S2 values. The siemens are a little slower than the stock Bosch. All the AFRs seem good now, just need a little tinkering to nail them.