GT-ER

http://www.fiveomotorsport.com/impor...s/?itemid=1342

These injectors look 100% identical to Eurocharged injectors and only cost $580 for the set vs. $800 for EC's and flow 550cc at 43.5psi ( which is about 680 at 65psi ). They even state they will work on the 55K engines.

skratch77

OK I have a quick question.Do you think anything bad would happen if we just bought one of these and used it on cylinder 8?

Like just throwing it in there with no retune or anything.How much more than stock do these flow?

AMG_RL

you would have to scale them in order to work properly Skratch.

skratch77

Yeah I figured that is a def for using all of them but was just wondering how much more just one of these would flow and just to use that one on number 8 for safety.

Im in the 11s A/F up top and lets just say I just added one of these on number 8 do you think it would hurt it or make it worse.

We know our cars starve up top end and number 8 is the first to go from being to lean.Im just trying to find a cheap safe gaurd for us that we can do to be a little safer than stock.

Just thinking about it it might be better to add 2 of these,one on number 8 for one bank and the other on number 4 or what ever one it would be on the other bank so the ecu see more fuel on both banks to adjust itself better.

we woudnt want to see more fuel on the 8th side andhave the ecu try to lean the whole car out

urbamworm

That isn't going to work. In my opinion if you are wanting to try and "rig" the car cheaply than get an adjustable fuel pressure regulator and swap it in the rail and set the static pressure just slightly higher than stock and the injectors will in turn flow more fuel and the ecu should have no problem as long as you don't change the pressure dramatically. Say increase it by 5psi.

urbamworm

Oh and those injectors are the same, same part number and all. I have known about them but didn't want to throw anyone under the bus for Benz tax. Kinda funny because I did just post in the other thread about these same injectors stating what they are oem equipment on.

AMGPilot

Can't put a pressure regulator in the rail. The system is returnless. That's a pulse damper in the rail

GT-ER

Won't work. The car will lean out all cylinders to try and cope with the new larger injectors making the rest of the cylinders run lean.

Forrest Gump 9

Too much fuel could be a bad thing too. You could "bore wash" #8.

kamilclk430

Nice find GT-ER gotta get them

urbamworm

I know the system is returnless and didn't even think about it not being a pressure regulator in the rail, just seeing that in the rail automatically put in my mind it is a regulator. Have never dug in to exactly all the details of this fuel system, how is pressure controlled? Is it built in to the fuel filter? My Audi had a returnless system stock and the pressure was controlled by the fuel filter so curious if that is how it is done on the E55 also or some other way.

Evolved8

Its says they fit "Modified supercharger?"

urbamworm

I didn't actually click on the link until now, just read the "red injectors" from 5 o motorsport and figured they had to be the ones I had seen in the past. Not sure if this is the same one or not but I am thinking no they aren't now after researching more. Gonna check my part number again and find the one I saw.

Taking the part number from the ones in my car this is what I get. click here

They look the same as the other ones listed as an "e55 injector." They list the Ford Explorer injector as a 300cc injector which I originally had seen. Since they mention how they leave the number on the injector but do customize the insides I assume they use that Ford OEM injector just changing the flow of it.

Either way, the ones labeled as for the E55 are still a good find for $580

ShangoAshe

sneakyneon posted about this topic last year when the injectors were first brought out. He found this a while back but I can tell you the injectors are great because that's where I got mine. 10k with them and still running strong

e55amgrocket

I put the 550cc injectors in my car over christmas that i got from that site and they worked perfectly. I had another local company flow test them also and they all flowed almost idenctically so i put the injector with the most flow in #8. I had Jeremy from OE custom tune the car and on the first pull with the mods i have i flat lined the a/f ratio at 10 so they put out some fuel. After about 2 hours of tuning we got the a/f's nice and safe and the injectors arent even close to max duty cycle. I havent had any problems with them at all. Very good for piece of mind when the stock injector duty cycle is maxed with only a few mods and a tune. Now i've got room to grow and dont have to worry about the fuel issues.

ShangoAshe

+1 Jeremy @ OE-Tuning tuned my injectors as well

turbo97se

Nice find ... I would still hit up Eurocharged tho .. as you guys mentioned, you need them tuned. A package from them might put you at the same price as these with someone else's tune ... worth asking at least.

tbal

+1

GT-ER

True I guess.

grane

Like the E55 it is a Chrysler product made by Bosch.

Seriously these cars are systems and it is great to see members sharing their discoveries and system tuning knowledge.

xpl0sive

are you guys using a larger rail with these 550cc injectors? like the TTM rail?

GT-ER

I don't think TTM's rail is any larger...only looped. I just plan on running larger injectors for now.

urbamworm

Stock rail. All you need is bigger injectors and be done with it.

From post #15 above, this is all you need to know So in my opinion a rail is a waste like I said from the get go, you need bigger injectors and that is it. Some may want to buy in to some looped rail that is not needed but whatever floats their boat.

AMGPilot

TTM ask a stock rail and loops it. The stock rail is plenty big to move 4.4 liters per min (550cc*8)

turbo97se

LOL, I've heard the same thing (about not being necessary) but no harm and not a whole lot of effort to loop it.

Also, there IS NO room for a bigger rail unless you want to start grinding on castings around it ... I've looked into this some for mine. Stocker is good enough!