Sickooli

Hi, wanting to upgrade fuel injectors to 550cc, most aftermarket one's need some sort of modification I think, but I read somewhere that the sl500,g55,ml430 flow at 550cc pn a1130780249, can someone please be kind enough to advise me if this is correct and also if they will drop straight in the c32, thanks and safe motoring sickooli. ps or if anyone knows an aftermarket product which can plug and play.

Lenin

Don't buy used a1130780249 injectors. New ones will cost you $$$.
I can tell you what I'm running. Bosch 0280158117
You can search ebay for 0280158117. They are Bosch EV14 550cc 48mm injector. I got mine from Eurocharged. Also search for these: LS2 LS3 LS7 EV6 Engine wire Harness to LS1 LS6 LT1 EV1 Injector Adapters . Will make install much easier.

Pansu

http://www.ebay.com/itm/Mercedes-Benz-2002-04-3-2L-C32-AMG-SLK32-AMG-set-of-6-660cc-Fuel-Injectors-/160922382696?pt=Motors_Car_Truck_Parts_Accessories&hash=item2577b8b168

Sickooli

thanks lenin seems a bit complicated

Sickooli

thanks for that pansu, I actually saw them but thought maybe 660cc might be to big.

Pansu

Usually they have also 550cc, ask them. Atleast they have v8 set of 550cc, cost only few bucks more.

JamesC32

I use these Bosch 0280156304 (A1130780123), they are a Mercedes drop in and show to flow 542.3CC per minute on the Weiss chart, though I don't have any track times to see how well they do.

cm60k

These upgrade injectors without ECU tune will be USELESS guys, isn't..?!!?

ZAYED,,

Lenin

Perhaps you don't need a tune for Bosch 0280156304 (A1130780123). I ran it without a tune. They are standard OEM replacements for 2006 E55 and are also listed in EPC as replacements for the C32 injectors. They are rated at 542CC but at 55PSI while other flow numbers are shown at lower PSI. Bosch 0280158117 flow 575CC at C32 standard fuel rail pressure of 58PSI. Either choice is fine, depending on the price.

cm60k

It's little weird to me Lenin, (396cc vs 542cc) is high jumped without tuning..?!?,

i think MB replace (072 to 304), to let you bring the car to them to reprogramming the ECU to the latest updated version of AFR..!

what do you think..?

ZAYED,,

Lenin

I hear you Zayed but EPC has no notes regarding the chassis or anything else. Just says that the old injectors have a replacement part which is A1130780123. May be the ECU adjusts the map enough not to cause a rich condition, maybe they just run at lower duty cycle and therefore at the appropriate flow and AFRs. I monitor AFRs on both banks and AFRs were correct.

cm60k

I see, cheers bro..

ZAYED,,

Pansu

But if the ecu doesnt know injector size, at least your computer shows wrong your consumption? Maybe some other things like cold start.

Lenin

If by consumption your refer to MPG, I never cared about MPG in an AMG. I can't explain the cold start situation as it relates to AFRs (or no AFRs) but look it up in EPC and tell me what it means to you.
For my current Bosch 0280158117 injectors I did get a tune from EC and recommend that it should be done by everyone that is going with larger injectors.

Pansu

In cold start there is no lambda adjustment, so engine can have too much gasoline. But you can try to adjust that in Star, there is leaner option to cold start.

tw2

You must have a tune if you change your injector size significantly. The ecu can only accommodate to a small degree and only in closed loop mode, NOT open loop ie WOT. If the car runs without a tune it will foul plugs, ruin cats, be slower and less economical. A tune will adjust the load maps, duty cycles and prevent those things.

Lenin

Are you talking theory here or you actually know how the ME2.8.1 is programmed? If according to EPC you can go from 396cc to 542cc then the ECU will adjust. If you have to bring the car to the dealer for an updated ECU file, then this is good news since it means that you can get an OEM ECU file for the 550cc injectors. However, I never heard of this OEM file to exist.

Pansu

And when you add enough fuel to engine, and update your primary fuelpump, next your fuel transfer pump is too weak. I found this today

Lenin

You mean the sender unit? What happened? What are you going to do to take care of the issue?

Pansu

Yes, that small transfer pump is rated so low flow and in WOT im out of gas. Have to change better pump.

Robert AMG

iTrader: (1)

Comparing at 3bars it is 400cc stock vs 480cc for the 2006 injectors,
after testing some cars the mercedes updated the injectors without updating the ecu afr,
my brother has cls55 p30 which has the 304 injectors from factory, i test it myself on the dyno, i watched the afr on dyno stock ecu with the 304 injectors then i flashed with the 2003 ecu, the afr remain the same no change, don't ask me how
but with the 2003 software it get back like 25 hp it went from 510-515 crank to like 490hp but the afr has remain the same, maybe cause the p30 file has more hp from factory.

Robert AMG

iTrader: (1)

if u has upgraded the main pump to a bigger one, u don't need the smaller one take it out, open from down the plastic chamber that the main pump is in it, and throw the smaller pump, i did it on my car.

Pansu

It is good way, if you have always at least half tank of gas But if you have small amount of gas and "drifting", then your pump can have air in it, thats why there is a sump.

Robert AMG

iTrader: (1)

all mercedes are without sump pump the e55 has no sump pump, i've been with this setup from 2 years without problem, i have a fuel pressure gauge in front my eyes.

Robert AMG

iTrader: (1)

open the module from down to let the fuel enter as i said.