replacing pintle cap w/ 4-nozzle on stock injectors

[cabriodster87]

I think starting on very cold days with these injectors will be difficult, ask me how i know. lol

[packratbimmer]

Just installed my MEPEH M50 injectors with a 2.5 bar FPR. Started up and idled great so I'm optimistic. Can't wait to take it out and let the ECU adapt.

[TurboJake]

M50 injectors are the same flow as M20, only 4 pintle design. Check out user MEPEH. He rebuilds injectors and also sells them on his website.

http://www.r3vlimited.com/board/showthread.php?t=266477&highlight=clean+injectors

No they are not. They are 17.5 lb injectors @ 3.5 BAR, 16.2 @ 3 BAR, and are VERY close to stock running an E FPR at 14.8 lbs @ 2.5 BAR.. Stock are 14.1 lbs @ 3 BAR

If you really want to get Gen III OP, and not have to deal with anything else, go with bosch 0280155847 or 0280155969. Otherwise, go simple and do m50 4 pintles at with an E FPR, which I would recommend if you're already confused.

[AndrewBird]

M50 injectors are the same flow as M20, only 4 pintle design. Check out user MEPEH. He rebuilds injectors and also sells them on his website.

http://www.r3vlimited.com/board/showthread.php?t=266477&highlight=clean+injectors

I had him rebuild a set of junkyard injectors and I am very happy with them.

[TurboJake]

Looking into getting rebuilt injectors, and I read a bunch of discussions about whether or not to switch to m50 injectors. I decided I didn't want to mess w/ different flow rates etc on my stock setup, and was just going to go with rebuilt stock injectors - the part number according to the Bentley is 0280150715. But then I came across these on eBay:

http://www.ebay.com/itm/3-Year-Warranty-M20-BMW-2-5L-GENUINE-BOSCH-Update-Fuel-Injector-Set-Upgrade-/301124493661?hash=item461c6b215d&vxp=mtr

They claim to be the stock injectors with, as I understand it, the single-pintle cap replaced with 4-nozzle caps. Has anybody done this? It would seem to address the atomization question without any worry about different flow rates, etc.

Those are NOT stock injectors replaced with 4 pintle. They are an entirely different injector.

More specifically, they are bosch 0280155771 injectors. Flowing 196cc @ 270kPa (18.7lbs @ 2.7 BAR). They come from a 1998-2000 Mercury Mystique, and I would HIGHLY recommend getting them from a different seller. One that doesn't attach BMW to them, such as this guy.

http://www.ebay.com/itm/Set-of-6-Flow-matched-set-OEM-Genuine-Ford-Bosch-Fuel-Injectors-0280155771-/151657384224?hash=item234f7c0920&vxp=mtr

I run them, they're great, HOWEVER I cannot speak for stock applications. I mated them up with a 2.5 BAR FPR from a 325e, a MAF conversion and a WAR chip, tuned them out and they're right as rain. (Didn't do much for tuning, it ran great with the stock 14lb map) INSTANT throttle response and no richy richness.

[packratbimmer]

The auction does not give a flow rate so I would be cautious.

My opinion is that injector upgrades should be accompanied by a proper tune/chip.

The M20 1.3 is adaptive, but I question the ability to deal with severe cold warm-ups - I see that you live in Chicago. I live in ME so I have some experience too!

I tried a similar set of injectors and they ran very rich. I have a black set of plugs to prove it!

[jdusty4]

Emailed the seller, and he would not confirm that these are stock, and said he would take down the part number to avoid confusion, and recommended I get the green-tops. I still wonder if it would be possible to replace the pintle cap with 4-nozzle, but that's not what these are.

[jdusty4]

Looking into getting rebuilt injectors, and I read a bunch of discussions about whether or not to switch to m50 injectors. I decided I didn't want to mess w/ different flow rates etc on my stock setup, and was just going to go with rebuilt stock injectors - the part number according to the Bentley is 0280150715. But then I came across these on eBay:

http://www.ebay.com/itm/3-Year-Warranty-M20-BMW-2-5L-GENUINE-BOSCH-Update-Fuel-Injector-Set-Upgrade-/301124493661?hash=item461c6b215d&vxp=mtr

They claim to be the stock injectors with, as I understand it, the single-pintle cap replaced with 4-nozzle caps. Has anybody done this? It would seem to address the atomization question without any worry about different flow rates, etc.