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Man getting those old injectors out was a pain in the neck. Put the new ones in. So far no issues. Hopefully tighten the bolts that hold the fuel rail down will keep the injectors in tight. And no leaks
Man getting those old injectors out was a pain in the neck. Put the new ones in. So far no issues. Hopefully tighten the bolts that hold the fuel rail down will keep the injectors in tight. And no leaks
pic of old injectors
that sucked soo bad when I did mine. I had two that I wasn’t sure if I was ever going to get them out of the rail.
Mounted finally. My back about to fall off my lawd. Tuck job isn’t the greatest but I don’t see anything moving or being tugged on. So continuing with the install
My finger tips hurt and I am bleeding everywhere on my hands lol. Taking a break. Will continue tomorrow to see what is the best way of tucking this. Because I am not having good luck right now.
Mounted finally. My back about to fall off my lawd. Tuck job isn’t the greatest but I don’t see anything moving or being tugged on. So continuing with the install
deciding I will modify this also. It looks terrible.
Loosen clamp and rotate exhaust until in perfect position then tighten. Prob a two man job to get it right. Had the same problem when Re installing mine. It will sit flush by the clamp when correctly positioned.
No not yet. They were supposed to go in last week but my new nuts, bolts, and gaskets haven’t been brought in by MB yet. Hopefully this week.
you have to have a tune that will adjust for the larger injectors. Can’t run without the tune
do you have a flex fuel kit? If you do it self adjusts for the fuel. I have 550 cc injectors no issues run e85 on regular 93 tune and have an e85 specific tune. If I run the e85 tune I do not have the flexibility of different fuels or mixing. I have seen guys having issues with the 600 cc injectors.
do you have a flex fuel kit? If you do it self adjusts for the fuel. I have 550 cc injectors no issues run e85 on regular 93 tune and have an e85 specific tune. If I run the e85 tune I do not have the flexibility of different fuels or mixing. I have seen guys having issues with the 600 cc injectors.
Yes I have the eflexfuel kit with the upgraded injectors. The previous owner mentioned he bought 550cc injectors from EC and the part numbers match what EC sells. I was told since I am upgrading to larger injectors I need a tune. Thanks to East Coast Euro I already have one of those and will get it uploaded today. But are you saying you don't need a tune with upgraded injectors?
I think he's saying that using 550cc doesn't need a tune with the flex fuel kit since the sensor already compensates for ethanol content as needed. On the other hand, with 600cc injectors, you will be constantly running almost 10% more fuel than necessary, regardless of if you're running 93 or E85. I imagine the ECU will eventually pull fuel to compensate, but it would be via long term fuel trims, rather than across the fueling tables as it should be.
So yea, you'd want to get retuned for the larger injectors.
I think he's saying that using 550cc doesn't need a tune with the flex fuel kit since the sensor already compensates for ethanol content as needed. On the other hand, with 600cc injectors, you will be constantly running almost 10% more fuel than necessary, regardless of if you're running 93 or E85. I imagine the ECU will eventually pull fuel to compensate, but it would be via long term fuel trims, rather than across the fueling tables as it should be.
So yea, you'd want to get retuned for the larger injectors.
But a couple people on this thread mentioned this is the same part number for the injectors they got from EC. Idk why mine came back as 600cc rather than 550cc. I do have a canned tune from EC I will load today but I am now thinking if the can tune was for 550cc and the injectors I installed are 600cc would that affect my car at all? I PM'd the user that sold me the kit since I am pretty sure he mentioned it was 550cc and he purchased from jerry along with a tune.
the 550cc and 600cc injectors that retailers sell are 596cc injectors. they're all the same Bosch OEM injectors just being sold as something different to make the retailer sound different.
no...for a working car you do not need a dedicated tune the Bosch ECU will correct fueling past +/-45, but i fully guarantee you a proper tune will feel 2.5 better than an off the shelf tune. but how many of you will pay 2x or even 2.5x more for that...probably none. if your tune is requiring you computer to have LTFT and STFT more than +/-10 your tune is not really a tune. you'd be surprised, once you have a proper tune even your transmission shifting becomes seamless and direct.
to safely build an off the shelf e85 tune, the tuner will be octane limited to 100-101 octane of 51% ethanol which is the lowest ethanol blend available with e85.
the 550cc and 600cc injectors that retailers sell are 596cc injectors. they're all the same Bosch OEM injectors just being sold as something different to make the retailer sound different.
no...for a working car you do not need a dedicated tune the Bosch ECU will correct fueling past +/-45, but i fully guarantee you a proper tune will feel 2.5 better than an off the shelf tune. but how many of you will pay 2x or even 2.5x more for that...probably none. if your tune is requiring you computer to have LTFT and STFT more than +/-10 your tune is not really a tune. you'd be surprised, once you have a proper tune even your transmission shifting becomes seamless and direct.
to safely build an off the shelf e85 tune, the tuner will be octane limited to 100-101 octane of 51% ethanol which is the lowest ethanol blend available with e85.
i was actually planning to get a custom tune in about a month since I am getting my headers installed tomorrow. Just wanted a temp solution to make sure car is running as it should before I spend another 2k for a custom tune
FYI, your factory computer should run and drive fine if you have a flex fuel sensor kit with the larger injectors. you just won't be "optimal" and making the most power possible.
the 550cc and 600cc injectors that retailers sell are 596cc injectors. they're all the same Bosch OEM injectors just being sold as something different to make the retailer sound different.
no...for a working car you do not need a dedicated tune the Bosch ECU will correct fueling past +/-45, but i fully guarantee you a proper tune will feel 2.5 better than an off the shelf tune. but how many of you will pay 2x or even 2.5x more for that...probably none. if your tune is requiring you computer to have LTFT and STFT more than +/-10 your tune is not really a tune. you'd be surprised, once you have a proper tune even your transmission shifting becomes seamless and direct.
to safely build an off the shelf e85 tune, the tuner will be octane limited to 100-101 octane of 51% ethanol which is the lowest ethanol blend available with e85.
i am an original purchaser of one of the first flex fuel kits when they became available. I purchased through eurocharged atx. I have been running this flex fuel kit for 3 years now. Primarily running e85 all the time on a 93 octane euro charged v6 tune. I have a dedicated e85 tune as well that I run as well sometimes. When it gets cold I run 93 octane due to hard starting. I have the mb stock injectors ported to 550 cc and flow tested. This was the original setup At the time when they sold the kits. It runs flawlessly with no check engine lights or any issues at all regardless of tune or fueling. It all makes its own adjustments. The people having problems with these kits are all these people buying the e flex and vrp kits running the 600cc injectors. I cannot speak for those. In Terms of a dedicated dyno tune for e85 def a much much better way to go in terms of performance. I will eventually do this as well. For me it has not been required and all my values are on point. Mine are true flow tested 550 cc ported mb injectors. No adapters were needed stock plugs to injectors
Last edited by AMGonFire; Mar 18, 2020 at 05:09 PM.
i am an original purchaser of one of the first flex fuel kits when they became available. I purchased through eurocharged atx. I have been running this flex fuel kit for 3 years now. Primarily running e85 all the time on a 93 octane euro charged v6 tune. I have a dedicated e85 tune as well that I run as well sometimes. When it gets cold I run 93 octane due to hard starting. I have the mb stock injectors ported to 550 cc and flow tested. This was the original setup At the time when they sold the kits. It runs flawlessly with no check engine lights or any issues at all regardless of tune or fueling. It all makes its own adjustments. The people having problems with these kits are all these people buying the e flex and vrp kits running the 600cc injectors. I cannot speak for those. In Terms of a dedicated dyno tune for e85 def a much much better way to go in terms of performance. I will eventually do this as well. For me it has not been required and all my values are on point. Mine are true flow tested 550 cc ported mb injectors. No adapters were needed stock plugs to injectors
Well my eflexfuel kit wasn't purchased from VRP with 600cc injectors. The previous owner told me he bought his injectors from Jerry at EC. Unless he lied to me which I hope he didn't. He advertised them as 550cc injectors from Eurocharged and as @hachiroku mentioned in his thread along with this one, he also bought his injectors from EC if I am not mistaken along with @PeterA90 he also bought these same injectors from EC. I think VRP sells the 630cc injectors not the 600s
FYI, your factory computer should run and drive fine if you have a flex fuel sensor kit with the larger injectors. you just won't be "optimal" and making the most power possible.
Well going to be going out for a test run tonight once I pressurize the system to make sure the car isn't leaking gas anywhere. I just want the car to run "safely" until my headers are on
Well my eflexfuel kit wasn't purchased from VRP with 600cc injectors. The previous owner told me he bought his injectors from Jerry at EC. Unless he lied to me which I hope he didn't. He advertised them as 550cc injectors from Eurocharged and as @hachiroku mentioned in his thread along with this one, he also bought his injectors from EC if I am not mistaken along with @PeterA90 he also bought these same injectors from EC. I think VRP sells the 630cc injectors not the 600s
these are the injectors you have. Same as mine when from EC. Unfortunately EC is very misleading.
Car ran OK on them without a tune charge.
my personal recommendation is I would buy brand new OE injectors and have an injector company port them to 525-545cc. 627cc is overkill on n/a car with 600hp crank...blower cars don’t even use that much
these are the injectors you have. Same as mine when from EC. Unfortunately EC is very misleading.
Car ran OK on them without a tune charge.
my personal recommendation is I would buy brand new OE injectors and have an injector company port them to 525-545cc. 627cc is overkill on n/a car with 600hp crank...blower cars don’t even use that much
As long as my car doesn’t have major problems with the injectors I’m fine. Don’t really care for the overkill part. As long as the car is getting the proper amount of fuel I’m happy.
As long as my car doesn’t have major problems with the injectors I’m fine. Don’t really care for the overkill part. As long as the car is getting the proper amount of fuel I’m happy.
it won’t. it just will be hunting constantly at idle. Pull battery overnight and reset adaptations. It will have plenty of fuel
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