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do 550cc injectors run smoother?

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Old 01-24-2018, 04:13 PM
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SL55, GL450, and 300SE
do 550cc injectors run smoother?

Do 550cc injectors make the M113K engine run smoother, or did I have issues with stock injectors?

Old stock injectors were less than 30K mile/ 2 years old, replaced after one of the factory ones got stuck open, and hydrolocked the engine

Yet, the car is noticeably smoother with 550cc injectors, when you go first step on the gas pedal, from any speed, and most pronounced when you shift to D, let go brakes, and first touch gas to move forward, for a fraction of a second, when engine speed starts climbing from 650, to whatever you open the throttle to, that little "buck", or "engine fart", when you go from idle speed, to running speed, is gone,,,

I am just curious if anyone else noticed such phenomenon, and its the new injectors, the tune, or the old injectors?

PS. The buck I describe is was not really an issue, and would mainly go unnoticeable for most drivers, it wasn't a defect, and was fine... its just that the 550cc injectors made smooth smoother...
Old 01-25-2018, 11:36 AM
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Originally Posted by bayhas
Do 550cc injectors make the M113K engine run smoother, or did I have issues with stock injectors?

Old stock injectors were less than 30K mile/ 2 years old, replaced after one of the factory ones got stuck open, and hydrolocked the engine

Yet, the car is noticeably smoother with 550cc injectors, when you go first step on the gas pedal, from any speed, and most pronounced when you shift to D, let go brakes, and first touch gas to move forward, for a fraction of a second, when engine speed starts climbing from 650, to whatever you open the throttle to, that little "buck", or "engine fart", when you go from idle speed, to running speed, is gone,,,

I am just curious if anyone else noticed such phenomenon, and its the new injectors, the tune, or the old injectors?

PS. The buck I describe is was not really an issue, and would mainly go unnoticeable for most drivers, it wasn't a defect, and was fine... its just that the 550cc injectors made smooth smoother...

If your car is running smoother now means your old injectors were dirty.

That buck is your clutch pulley and fuel mapping on tip in. on your tune.
Old 01-25-2018, 01:06 PM
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Originally Posted by oneslow55
If your car is running smoother now means your old injectors were dirty.

That buck is your clutch pulley and fuel mapping on tip in. on your tune.
Nah, I am talking about engine hesitation for a fraction of a second, not the much more pronounced clutch engagement surge, that one is actually even more pronounced now... but it doesn't bother me...

I ll rule it out as crap injectors, as I bought those off eBay two years ago, when one of the factory ones got stuck open. They were Bosch, but I always questioned their authenticity and quality, due to price
Old 01-25-2018, 01:40 PM
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Originally Posted by bayhas
Nah, I am talking about engine hesitation for a fraction of a second, not the much more pronounced clutch engagement surge, that one is actually even more pronounced now... but it doesn't bother me...

I ll rule it out as crap injectors, as I bought those off eBay two years ago, when one of the factory ones got stuck open. They were Bosch, but I always questioned their authenticity and quality, due to price
My buddy sells bosch injectors and if you buy bulk there dirt cheap!!.If you pay $300 for them there still making money on them as I get them for $230 my cost.
Old 02-02-2018, 11:06 AM
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2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI
I've posted this years ago -- while they are very expensive, the 6 port SLR injectors are superior to all the rest. It's the spray pattern and better atomization that make all the difference.
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Old 02-02-2018, 01:43 PM
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What's the best place to get em? There's no third party equivalent?
Old 02-02-2018, 01:48 PM
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https://www.fcpeuro.com/products/mer...mer-1550780049

God damn $185 per injector lol
Old 02-05-2018, 06:41 AM
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Originally Posted by MACEDON
Considering a full set of DeatschWerks 550s run ~$600 thats always going to be the better route. Don't pay the SLR tax.

--Kyle
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Old 02-05-2018, 08:43 AM
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So if I get these do I need pigtails or to trim something to fit are they plug und play

http://deatschwerks.rpmware.com/deat.../i-411403.aspx
Old 02-05-2018, 08:51 AM
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They are plug and play, no pigtails needed.

--Kyle

Edit: Chatting w/ M3diesel who helped develop the kit "The adapters that they include will cause you to have to clock the injectors and makes the OEM clips, that hold the injector to the fuel rail, useless. The adapter that have 2-3" of wire between the EV1 and EV6 are the necessary adapters.."

Last edited by FCPEuro; 02-05-2018 at 02:40 PM.
Old 02-05-2018, 09:02 AM
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Do you carry them on your site?
Old 02-05-2018, 09:46 AM
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Sadly, I do not. Also, to clarify the kit includes a set of EV1 to EV6 adapters under their kit part number.

Edit: Chatting w/ M3diesel who helped develop the kit "The adapters that they include will cause you to have to clock the injectors and makes the OEM clips, that hold the injector to the fuel rail, useless. The adapter that have 2-3" of wire between the EV1 and EV6 are the necessary adapters.."

Last edited by FCPEuro; 02-05-2018 at 02:40 PM.
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Old 02-28-2021, 08:59 AM
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2004 Mercedes Benz E55 AMG
I have a 04 e55 amg with 80mm pulley. I am going to buy the Deatschwerks 550s, but my question is......
For the Deatschwerks 550s will i need a new tune?

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