Bosch fuel injectors are inefficient for the m113k
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Joined: Aug 2019
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CLS55 AMG 06
Bosch fuel injectors are inefficient for the m113k
Hello, I know there are several thread on fuel injectors and ive read them all. I currenty have "a1120780349 0280156072" fuel injectors, when I look up the part number I get this site https://www.injectorplanet.com/produ...sch-0280156072 that says they are 431cc injectors, The guy I bought my cls55 from said he upgraded the injectors with 550cc injectors but these are def not 550cc. If anyone knows a thing about my injectors please give me some insight.
The post I linked below shows a guy testing the flow rate of the oem injectors, SLR injectors and the bosch 550 injectors, In the video it shows how the stock and SLR injectors spray alot more and also target the spray to hit 1 point compared to the bosch 550ccs that spray all around and are clearly not a targeted spray.
The last point was that at lower bar pressure/flow rate the bosch injectors would not even spray compared to the oem ones, the 550cc ones where clearly weaker and did not flow at lower pressure as well as being unable to spray at higher pressure. I see no mention in any posts on the internet that directly compare these fuel injectors which are a very importaint part of the car, this is once again showing how the bosch injectors aka the ones I have are actually really crappy.
I want to replace my injectors with better ones, but I really dont know where to go. Id buy oem injectors but they are quite expensive compared to the bosch ones(450cc,550cc,630cc//750cc,1000cc) I dont care about the price, but I want injectors that are going to work the best on a stock setup, and for a person that plans to upgrade the supercharger pulley and more in the future without sacrificing performance now. Thank you..
The post I linked below shows a guy testing the flow rate of the oem injectors, SLR injectors and the bosch 550 injectors, In the video it shows how the stock and SLR injectors spray alot more and also target the spray to hit 1 point compared to the bosch 550ccs that spray all around and are clearly not a targeted spray.
The last point was that at lower bar pressure/flow rate the bosch injectors would not even spray compared to the oem ones, the 550cc ones where clearly weaker and did not flow at lower pressure as well as being unable to spray at higher pressure. I see no mention in any posts on the internet that directly compare these fuel injectors which are a very importaint part of the car, this is once again showing how the bosch injectors aka the ones I have are actually really crappy.
I want to replace my injectors with better ones, but I really dont know where to go. Id buy oem injectors but they are quite expensive compared to the bosch ones(450cc,550cc,630cc//750cc,1000cc) I dont care about the price, but I want injectors that are going to work the best on a stock setup, and for a person that plans to upgrade the supercharger pulley and more in the future without sacrificing performance now. Thank you..
Last edited by Rpkxnoscope; Apr 26, 2020 at 10:06 PM.
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Joined: Apr 2013
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From: SE
MB E500 Volvo XC70
The launch test bench don't compensate for latency of different injectors, I have one btw and I use it frequently for many years.
if injector have different coil resistance etc you can't compare them side to side. (you can but its no use)
The launch is good for checking and comparing equal injectors as a evaluation but you can't adjust the "pules" other than how long "ms" it will open
but the current that is important when injectors run short puls with high fule pressure can't be adjusted.
also take the pressure differens in a engine as a reminder if you run 1bar boost and 4 bar fule pressure injector is only running at 3 bar.
if you look deep into this you will find that there is also voltage compensation to take into account when swapping injectors. but this can be adjusted in the ME but not without proper knowledge.
its like comparing a Appel and a Lemmon both are round but different in so many other ways.
if injector have different coil resistance etc you can't compare them side to side. (you can but its no use)
The launch is good for checking and comparing equal injectors as a evaluation but you can't adjust the "pules" other than how long "ms" it will open
but the current that is important when injectors run short puls with high fule pressure can't be adjusted.
also take the pressure differens in a engine as a reminder if you run 1bar boost and 4 bar fule pressure injector is only running at 3 bar.
if you look deep into this you will find that there is also voltage compensation to take into account when swapping injectors. but this can be adjusted in the ME but not without proper knowledge.
its like comparing a Appel and a Lemmon both are round but different in so many other ways.
Thread Starter
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Joined: Aug 2019
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CLS55 AMG 06
You are saying that the test he conducted does not show the true perforance of the bosch injectors, even if this test is using different "coil resistance" like you say, the bosch injectors are meant to be plug and play for the m113k so the test should be a direct comparision, the fact that many m113k owners will plug and play the bosch injectors and you saying that these apparently need more "power" applied to them to have comparable spray pressure, is very bad for many people that don't get professional tunes specifically for the bosch injectors.
The 2 facts you need to know about this test are that 1 the bosch does not target the spray like the oem/slr fuel injectors do, and 2 during lower and higher operating pressures, the bosch injectors won't spray at high pressure and low pressure compared to the OEM injectors. These facts alone are going to affect your performance alot.
The 2 facts you need to know about this test are that 1 the bosch does not target the spray like the oem/slr fuel injectors do, and 2 during lower and higher operating pressures, the bosch injectors won't spray at high pressure and low pressure compared to the OEM injectors. These facts alone are going to affect your performance alot.
Last edited by Rpkxnoscope; Apr 20, 2020 at 05:54 PM.
Thread Starter
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Joined: Aug 2019
Posts: 94
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CLS55 AMG 06
Can someone please tell me what the best fuel injectors for my cls55. I looked up my after market injectors and they sell for 10 dollars each on alibaba which is ****ing terrible, then this guy's instagram video shows the bosch injectors barely being able to spray at low and high pressure, then its 600$ for oem injecotors, I apparently have a tune for my car and I feel if i put oem back in it might not run as well because of the alleged tune on my car, again if anyone knows what injectors I have (a1120780349 0280156072)or any reference of what ones I should get PLEASE PLEASE give me some insight there is none anywhere else .
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Joined: Apr 2013
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From: SE
MB E500 Volvo XC70
first I don't say they need more power I say there is differences that ned to be taken into account, like the injector response time relative to voltage for example
2 injectors of same size but from different design/generation don't spray equal at same PW and same fule pressure. the transistor will react different depending on resistance and the needle in injector haw different "movement"
There is great literature regarding this but I don't know how deep you want to Digg.
Second if you don't know what tune you haw in the car then you need someone who can read it and maybe can find what its made for.
But that is not as easy so probably your best bet on a good working solution is to find a tuner willing to sell a kit with matching software and injectors.
alternative is to go with stock tune and injectors. guessing is expensive in the long run.
if you can't test injectors then haw someone do if for you especially if you buy from cheap sources. someone need to make the quality check.
the injector characteristics need to be correct in the software otherwise you will run out of adaption in the end.
2 injectors of same size but from different design/generation don't spray equal at same PW and same fule pressure. the transistor will react different depending on resistance and the needle in injector haw different "movement"
There is great literature regarding this but I don't know how deep you want to Digg.
Second if you don't know what tune you haw in the car then you need someone who can read it and maybe can find what its made for.
But that is not as easy so probably your best bet on a good working solution is to find a tuner willing to sell a kit with matching software and injectors.
alternative is to go with stock tune and injectors. guessing is expensive in the long run.
if you can't test injectors then haw someone do if for you especially if you buy from cheap sources. someone need to make the quality check.
the injector characteristics need to be correct in the software otherwise you will run out of adaption in the end.
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Joined: Jul 2012
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2002 CL500 to CL55 conversion
Interesting thread that I feel deserves more discussion
based on this theory about the spray pattern, it would seem de-capping oem mercedes injectors could make the fuel atomization even worse than expected when typically decapping modern injectors
based on this theory about the spray pattern, it would seem de-capping oem mercedes injectors could make the fuel atomization even worse than expected when typically decapping modern injectors
