I've been reading that some "7" owners are replacing their stock injectors with FORD Mustang Injectors (Bosch Part # 0280155700). But, these guys are driving the 95 or newer 7-series.

I have a 94 740iL. Will this mod work for me too? If not, what will?

Also works on older cars, see here
Installation of Ford Mustang 19#/hr Bosch injectors, e32 & e34, m30
http://www.nmia.com/~dgnrg/page_2.htm

What are the bennefits?

readily available and cheap.........

The benefits are better gas mileage and improved performance!!! The Mustang nozzle has 4 holes as oppose to Stock that has only 2 holes.

fo real? better? we want proof

fo real? better? we want proof

in case you missed this in the link posted by shogun:

Written by Ed Walters '00
Team DFL

Mustang Injector Info


Here are the part numbers and what they are rated at.
Stock E28 535: 19.82 lbs/hr @ 43.5psi (3bar)
Stock Mustang: 19 lbs/hr @ 38psi


The increase in flow rate is proportional to the square root of the increase in pressure. To convert the mustang flow rate to flow rate at BMW pressure:
STOCK(Sorry don't know the part number) 19 * (43.5/38)^1/2 = 20.33lbs/hr approx. 2.6% increase.
M9593A302 24 lbs/hr @ 38psi so 25.68 lbs/hr at 43.5psi approx. 29.566% increase.


Now it all depends on how much power you are going to be making. My thought is that if you will be getting close to 260, so you will want an injector that can handle that amount of power at 85% duty cycle. Since the stock injectors can handle 240 on lets say 100% duty cycle. So, a 19 lbs/hr injector from a Mustang which would be a 20.33 in our car, you will be able to put out 3% more power at the same duty cycle. So you will be able to put out somewhere close to 247hp. Now lets go to the 24 lbs/hr injector which is 25.68 lbs/hr in our cars. That gives you a 29.566% increase which means that it can support 311 bhp. Now you only want to be running at about 85% of that so, at 85% duty cycle you will be able to support about 264hp. If you find that the car is running too rich, then you can always lower the fuel pressure which is very easy. You just use a 528e fuel pressure regulator, which is 2.5 bar.

But how would/well does this work on the E38/E39? I would think that the computer would need something to make them run right and be able to get an actual perfromance changes out of them. My guess is if anything they might make the car run butter strictly because they are new injectors, not because they flow better since the computer is what controls their flow. Shogun, I know your like the super guru of the E32 and I remember reading about these when I had my E34 M5. I know Farhod w/ an E38 used these and can't really report any gains, but at the same time I can't imagine I'd be a bad 'maintenance' idea if their cheaper to replace w/ the Mustang ones as opposed to removing the stock ones and having them cleaned by some place like RC Engineering.

They work fine with the M62 (E38 or E39) and are a direct replacement for factory injectors, so much so that they are an official BMW upgrade. No software work is needed as the flow is within the ECU map's scope for adjustment. I think calling them mustang injectors confuses people.

They are the same spec, but the design III atomises the fuel more efficiently, leading to slightly better fuel consumption and debatably more peformance.

I've never heard of them being an "official" BMW upgrade.....any links or literature stating this before I start shopping?

read about this a while ago but never really paid attention to it till now.

4 > 2 holes! and yet you dont go thru gas faster?

4 > 2 holes! and yet you dont go thru gas faster?

from what I have read: 4 holes equal better atomization of the fuel which theoretically translates to better economy

I can understand the benefit and all, and I do not claim to be some pro on understanding fuel injection, but.....more holes and a different resistance I compare to doing a larger intake tube w/ a better filter. Sure you might not NEED software since the computer adapts, but software would probably still get the best benefit out of this mod, either by itself of in combination w/ intake and exhaust mods. I'm waiting to see the official information that he is speakin of just because this would be a vanity mod for me down the road.

I bought a set of 19lb injectors to replace the original injectors and noticed an improvement starting and idling. I attributed this to the fact that they were new and were replacing injectors with about 150k. After a couple of weeks of use, I was looking at the values stored in the DME and found that they were actually causing the engine to run a little lean, not a problem as the DME had adjusted to make them work but I don't like to see any indication of a lean condition. At that point I ordered a set of 24lb injectors. Now the DME values are indicating a slightly rich condition so I am more comfortable knowing that it will take some sort of major leak to cause the engine to run so lean that the DME won't be able to compensate for.

Bottom line is for a stock 540/740, the 19lb injectors will work fine, they are alot cheaper than BMW/Siemens replacements and I have a set if anyone is interested with only about a month of use on them.

bimmerfixr,
thanks for shedding light on this, specially coming from you. curious how much you want for dem injectors? :)

bimmerfixr,
thanks for shedding light on this, specially coming from you. curious how much you want for dem injectors? :)

five0motorsport.com wants $339.50. Make me a reasonable offer, I'm not greedy and they are used.:cool

Thanks Bimmerfixr, that's the kind of information that makes me truely appreciate these messageboards. I'm not sure if you saw my "Real 540 turbo" thread on the FI, 540 and 740 boards but i'm already pretty lean as is, so this mod would make things even worse for me at the moment until I decide on if I wanna do the Unichip piggyback or trust Upsolute and their tuning technique of adjust the software based on my A/F ratios after the car is dynoed on their baseline software. Ditto on the price of those injectors for future use, becuase no matter what I do, replacing the injectors for FI makes sense regardless of going w/ stock ones, these Mustang ones or the 24lb'ers you chose. Thanks.

Thanks Bimmerfixr, that's the kind of information that makes me truely appreciate these messageboards. I'm not sure if you saw my "Real 540 turbo" thread on the FI, 540 and 740 boards but i'm already pretty lean as is, so this mod would make things even worse for me at the moment until I decide on if I wanna do the Unichip piggyback or trust Upsolute and their tuning technique of adjust the software based on my A/F ratios after the car is dynoed on their baseline software. Ditto on the price of those injectors for future use, becuase no matter what I do, replacing the injectors for FI makes sense regardless of going w/ stock ones, these Mustang ones or the 24lb'ers you chose. Thanks.

I went with these, they should do the trick for you.

F5DE-24lb - 0280155715

fiveomotorsport.com

Enjoy!!!

I'm driving from Cheney, WA to Boise, ID right now....any chance you could tell me what they run for on that site :) Also, what's your opinion on the whole software/piggyback idea?

You shouldn't be posting and driving at the same time.:evil2
I don't know anything about the piggyback or Upsolute to offer any advice but if you are already running lean, the 24lb injectors will probably do the trick. With the 19lb injectors, the adaptation values in my DME were about +10% meaning it was adding fuel, engine running lean. With the 24lb injectors, the d\DME values are running -10% meaning its holding back. This tells me that when my foots to the floor turning 6200 rpms in 6th gear, chances are the engine is not running lean. One of these days I'll get it on a dyno so I'll know for sure.

"What are you talkin about officer, it's an online training course....duh!" :) "Texting is when i'm tryin to get laid sir!"

:rofl::rofl::rofl:

They work fine with the M62 (E38 or E39) and are a direct replacement for factory injectors, so much so that they are an official BMW upgrade. No software work is needed as the flow is within the ECU map's scope for adjustment. I think calling them mustang injectors confuses people.

They are the same spec, but the design III atomises the fuel more efficiently, leading to slightly better fuel consumption and debatably more peformance.

I would still like to see this literature or whatever showing these injectors being an official BMW upgrade.

4 > 2 holes! and yet you dont go thru gas faster?

Wait!!!

The original BMW injectors also have 4 holes.

I went with these, they should do the trick for you.

F5DE-24lb - 0280155715

fiveomotorsport.com

Enjoy!!!

+1

I got mine from fiveomotorsport.com. And after installing them and driving around with them for almost a year now, I can definitely say that I am a much better person because of it.

.....let the education continue!

are'nt the FIVE-O injectors used/refurbished??? I remember this topic/discussion/argument coming up on another board......

It looks like it from reading the verbage on their site.

oh i like this thread more and more

I would still like to see this literature or whatever showing these injectors being an official BMW upgrade.

I read it on these very forums at some stage. Either on the E38 or E39. Not sure which. IIRC there was some linkage too.

if so, why not just get your own set ultrasonically cleaned??

If you look at the yellow, 19lb, injectors it clearly states that they are new parts. I am asumming that the 24lb injectors are new also just because of the price and there is no core charge. If you compare the price of new BMW injectors, $130.57 each on realoem, well, you do the math.

I just bought a set on eBay!!!

Here is the item number: 300167221970

I'lle lt you know how it goes after I install them.

I just bought a set on eBay!!! Here is the item number: 300167221970 I'lle lt you know how it goes after I install them.


Darn good price!

Thanks! I was so nervous that I was not going to beat the other 2 buyers...I only had $31.00 in Paypal! :eyecrazy

The guy emailed me and he said that he sent it priority. I hope to get it by Saturday. I will have my car emmisioned first before I install them middle of next week.

Is there a difference between EUR model and the USA model?

Is there a difference between EUR model and the USA model?

No, they are the same. The only difference is cars up to 9/98 use a different injector than cars from 9/98.
FWIW I have switched the Bosch injectors with the Lucas injectors on the pre 9/98 cars. They seem to start better and idle smoother. This goes for E32/E34 V8's too.
The Bosch injectors have a BMW list price of $125.00 while the Lucas injectors list for $41.70, that's a huge difference!

No, they are the same. The only difference is cars up to 9/98 use a different injector than cars from 9/98.
FWIW I have switched the Bosch injectors with the Lucas injectors on the pre 9/98 cars. They seem to start better and idle smoother. This goes for E32/E34 V8's too.
The Bosch injectors have a BMW list price of $125.00 while the Lucas injectors list for $41.70, that's a huge difference!

Which Bosch injectors did you have, and then which Lucas injectors did you switch to (I need links)?

I don't think Lucas injectors are on this page, http://www.fiveomotorsport.com/Injector_SetsBMW.asp

BMW pn for bosch, 13 64 1 736 908.
BMW pn for lucas, 13 64 1 747 406.