Fuel Injector Upgrade for E53 - Is there such a thing?
 

Hi Folks,

So I've toyed with the idea of upgrading my injectors. Ater reading a few threads here and in other sights, it seems most folks bring up the "mustang" injectors, sold by Five-o motors which essentially are a "next generation" improvement over the current OEM versions. However, when calling Five-O due to confusion about the specs, they said that the E53 (mine is a 2001 3.o) doesn't have any options for upgrade, and that I'm stuck with OEM. If I chose to still try the new ones, they would make the engine run too rich which can lead to problems (my understanding is that OEM injectors flow at 19lbs/hr; the "mustangs" at 24lbs/hr).

My goal by upgrading was to improve efficiency, with any increase in power (if any) a welcome plus. Has anyone had any luck "upgrading" theirs?

Waste of money IMO. Unless you've added different ecu/cams/headers/exhaust at a minimum... or even better some soft of forced induction.

You can look around on forums like E46 Fanatics since they share the same engine, but IMHO it is a waste of time unless you go FI.

Thanks for the input guys. Really appreciate it.

The only reason I was looking in to it was that my injectors have 165,000 miles on them and was considering replacing them since there's some other repair/maintenance work being done in the engine. The price for the "upgraded" injectors is about the same as OEMl in some cases even lower. But my concern was weather there would be an adverse effect on the engine. Folks in E46 and other forums claim better MPG, acceleration and more power.

I'm thinking at this point I'll just run with what I have a while longer. Again, it seems there is conflicting information even from the shops that sell them as to whether they will fit at all, hence my confusion/hesitation and this post. I'm still to find someone who has done this in an e53.

From Turner Motorsports site:

Bosch 24 lb Fuel Injector - Blue Top (Bosch # 0-280-150-947)

click for larger
Part #: 24LBINJ-P

The 24 LB Bosch blue-top injector is used in many high performance vehicles which require a good amount of fuel. This fuel injector is most commonly used on Ford Mustangs, and other domestic V8's, which require a healthy amount of fuel. This is a genuine Bosch fuel injector, Bosch part number 0-280-150-947 / Ford Motorsport part # F1TE-D5A. Sold individually, so be sure to order enough for your application.

We use this particular Bosch injector on modified E36 M3 BMWs, which require more fuel to balance the air/fuel ratio after adding modifications such as cold air intake, cams, headers, etc. During our own testing we found the stock BMW injectors reach their limits with only a few modifications (intake, HFM, and basic chip). Anything more than these basic upgrades and you will need larger injectors. In the packages and kits we have developed we found the 24# pound fuel injector to be ideal – not too large and not too small. With the correct software you can run your engine without fear of the mixture being too lean. This is the fuel injector we use in our 3.2 OBD-II kits as well as in our 3.0/3.2 OBD-I systems. This injector, and the software we have developed when using them, are designed for the E36 M3 BMWs only (We have not seen a reason to use them on a E36 325 or 328).

Note: you should never use a fuel injector that is not properly calibrated to your engine with the proper software! Doing so can seriously damage the engine, ECU, or injectors.