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E34 (1989 - 1995)

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  #1  
Old 12-08-2015, 09:01 PM
NeilGM NeilGM is offline
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M30 injector flow rate in cc/min

I can't seem to find any agreement on this topic. I know the injectors for an M30 engine are 19 lb injectors, but it seems like there is some amount of disparity in what that actually means. It seems like cc/min is more accurate, but I've seen people claim that the stock injectors on a 535i are anywhere from 185 to 220 cc/min, and 19lbs converts to 198cc/min.

Anyone have any input on what is correct?
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  #2  
Old 12-08-2015, 09:52 PM
capricornbmw capricornbmw is online now
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So obviously those people don't know what they are talking about, and you should thus disregard what they say entirely.

198cc/min. That's the right number. Or you'll need to call Bosch directly to check.

And see what it says here :

http://users.erols.com/srweiss/tableifc.htm#BOSCH
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  #3  
Old 12-08-2015, 10:49 PM
NeilGM NeilGM is offline
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First, thanks for the chart. Only problem is it also shows some potential deviation for the part number. I show the Bosch part number to be 0280150714, and checking that against the chart you posted, they show two injectors for that part number, either a 18.25# or 20.35# injector and flows either 192 or 214 cc/min. I hadn't thought to call Bosch...

Also, now that I think about it, I've seen people reference the 20.35# number before as well. I know the ECU adapts to some deviation, but I thought it may be worth clearing things up a little for anyone searching like me.
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  #4  
Old 12-09-2015, 02:17 AM
capricornbmw capricornbmw is online now
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Do the checks and update this thread. This is something that we need to be sure about and obviously the info being published has gaps.
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  #5  
Old 12-09-2015, 04:12 PM
NeilGM NeilGM is offline
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Using the Bosch part numbers (original and current) and just googling around, I can fairly confidently say that the injectors are 20.35# or 213cc/min injectors.

Most of the mustang injectors that people use in replacement are rated around 205-210 at 3 bar, so pretty similar.
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  #6  
Old 12-09-2015, 07:36 PM
capricornbmw capricornbmw is online now
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Quote:
Originally Posted by NeilGM View Post
Using the Bosch part numbers (original and current) and just googling around, I can fairly confidently say that the injectors are 20.35# or 213cc/min injectors.

Most of the mustang injectors that people use in replacement are rated around 205-210 at 3 bar, so pretty similar.
Yes, that's another thing, thanks for reminding me. The flow rates are dependant on the pressure of the regulator behind them. It wasn't quite clear what the standard pressure used in these specs is - is it 2.5bar? or 3 bar? Can you confirm either ?

In fact, that might be the reason for the huge variation in flow rates for the same injector that you had been reading about earlier.
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