When are injectors needed

Feb 16, 2015 | 03:52 PM

alexanderfoti

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Joined: Mar 2010

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From: London UK

2013 W204 C63 AMG, 2008 W221 S65 AMG

When are injectors needed

Hi all

Currently running a 180 crank pulley with EC heat exchanger + EC tune, looking to do an EC upper pulley too but wondering what the limit is for the current injectors before running lean is?

Is this combo safe on stock injectors?

Feb 16, 2015 | 03:59 PM

2000UZJ

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From: Earth, USA, Atlanta, GA

E55

550CC with a looped rail will give you a safety net.

I would not be so concerned about the fuel injector size (although a concern). I am always scared about high mileage fuel pumps getting clogged up and not being able to deliver fuel.

Feb 16, 2015 | 04:01 PM

alexanderfoti

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From: London UK

2013 W204 C63 AMG, 2008 W221 S65 AMG

At least on the 215 there is a fuel pressure sensor and 2 fuel pumps so if one dies it will log a fault put it in limp mode.

At least no leaning out from the a failing fuel pump.

so are we saying 16/17psi on stock injectors without rail modification is ok on stock system? I have a brand new fuel filter also.

Feb 16, 2015 | 04:09 PM

SilverStrk

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From: San Diego

05 E55, 07 ML500

When you get near 500WHP.. It's a good precautionary move to go to 550's and looped rail.. You do Not want to max out the duty cycle of the stock injectors..

Feb 16, 2015 | 04:14 PM

alexanderfoti

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Joined: Mar 2010

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From: London UK

2013 W204 C63 AMG, 2008 W221 S65 AMG

Ok so before I look at SC pulley I should look at a set of injectors, are these suitable for the M113K in my car:

http://www.ebay.co.uk/itm/Mercedes-5...-/281329399621

Are they a straight fit:

http://www.ebay.co.uk/itm/Mercedes-5...-/281329399621

Feb 16, 2015 | 06:05 PM

SICAMG

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2005 e55 AMG

Quote:

Originally Posted by 2000UZJ

For traditional e55"s just loop the rail, add a center inlet with a 90 degree screw on filter and remove the factory filter. All set. I think the op"s car is set up the same? Learned all this from Chawkins.

Last edited by SICAMG; Feb 16, 2015 at 06:08 PM.

Feb 17, 2015 | 01:52 PM

kponti

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Joined: Dec 2013

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E63

Quote:

Originally Posted by SICAMG

I wish someone would post pics etc so we can all see and try to emulate.

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Apr 27, 2020 | 05:19 PM

AgSilver

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From: Florida-Germany-New York

2004 E55,1969 300SEL6.3,2011 ML350 BlueTec Diesel,2005 ML400 CDI

I know they're pricey, but the 6 port SLR injectors will make all the difference. Remember, the SLR is rated at 626 hp and tuners have taken it way beyond that without changing the injectors --- and yes, a balanced rail is important FWIW

Jun 17, 2020 | 03:02 PM

#10

jetstream

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Joined: Jan 2019

Posts: 23

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From: White Rock B.C. Canada

2006 CLS55

Choosing what size of injector?

Quote:

Originally Posted by SilverStrk

When you get near 500WHP.. It's a good precautionary move to go to 550's and looped rail.. You do Not want to max out the duty cycle of the stock injectors..

My car has 65,000 miles, so it seems time to change the fuel filter. Some users have suggested also changing the fuel pump(s) I have read there are 2? I am hoping to get to 550RWHP. And planning on changing fuel line inlet to the center, adding screw in air filter (eliminating factory one), adding pressure guage and looping the rail, and maybe running a return, as sicamg has done. I also suspect I have original injectors, so they are likely in need if changing. So, is there a down side in going bigger, like 650cc, or should i go with the more common 550cc?
thanks.

Last edited by jetstream; Jun 17, 2020 at 03:04 PM.

Jun 17, 2020 | 03:25 PM

#11

Munchy

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Quote:

Originally Posted by SilverStrk

When you get near 500WHP.. It's a good precautionary move to go to 550's and looped rail.. You do Not want to max out the duty cycle of the stock injectors..

Looped fuel rail seems to be a theory. I haven't seen any information proving that it starves fuel.

Jun 17, 2020 | 03:36 PM

#12

jetstream

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From: White Rock B.C. Canada

2006 CLS55

Ok, but it also seems that a looped fuel rail won’t be worse than a non-looped, and if it saves fuel starvation to #8 even once, it would be worth it.

Jun 19, 2020 | 07:46 AM

#13

Munchy

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Quote:

Originally Posted by jetstream

Ok, but it also seems that a looped fuel rail won’t be worse than a non-looped, and if it saves fuel starvation to #8 even once, it would be worth it.

That is true but it's not cheap