M20 Injectors - Why use m50?

[WhyNot]

Here's the best link of all, really.

AND

that was exactly what my little brain needed to see.
thanks
the comment at the end of the second video is important too.
in that even a good injector but one that is unbalanced will get the motor twisted.
thanks again man

[5Toes]

So Jake, what is better?

The ones i linked to or the ones you linked to? Because they both have the different style body, etc.

[TurboJake]

at the risk of hijacking this thread, can i get some links that explain why pintleless is a better design.
to over simplify it all, does the better injectors simply create a finer mist that enhances combustion?
thanks
whynot

You pretty much have it.
Less moving and wear parts (More reliable)
Better mist, better atomization (Better burn, more power and with the same amount of fuel, resulting in higher efficiency)
Better spray concentration (only the valve, vs the valve and a large portion of port)

Will it be a noticeable improvement. Sure. But nothing along the lines of 5 bazillion more HP and MPG's.

Here's the best link of all, really.



AND

[5Toes]

Man I thought the ones I posted were a pretty good alternative

I used this chart to find them

http://users.erols.com/srweiss/tableifc.htm#BOSCH

[WhyNot]

at the risk of hijacking this thread, can i get some links that explain why pintleless is a better design.
to over simplify it all, does the better injectors simply create a finer mist that enhances combustion?
thanks
whynot

[TurboJake]

The 1998-2000 mercury Mystique/Ford Contour 2.5l Non-SVT injectors are Bosch Design III 4 hole pintleless design, that is 17 lbs/hr @3bar (slightly less flow than the M50 injectors, and 4 hole)
Bosch part number 0280155771

And can be had for cheap as dirt.
http://www.ebay.com/itm/98-00-Mercur...ht_6890wt_1159




and there's a 15lb/hr injector that will swap in. But I'd need to dive deep into my bosch part book to find the part number.

EDIT: it's 0280155847
15 lbs/hr.

Stock M20 injector is 0280150715

Stock XXXXXX715 15.9Ohms 166ml/min 0angle 80%area spray 60.5mm oring to oring 77mm total length (Including pintle cap)
15lbGenIII XXXXXX847 14.5Ohms 166ml/min 0angle 30%area spray 60.3mm oring to oring 74mm total length
17lbGenIII XXXXXX771 14,5Ohms 196ml/min 0angle 30%area spray 60.35mm oring to oring 73mm total length


^R3v, y u no let me do proper spacing?

[5Toes]

Have done some research tonight.. and these injectors should be the upgrade for m20s. From speaking with a german enthusiast (and other european BMW nuts) I have learned m50 injectors really are too big

I present these!

http://www.ebay.com/itm/92-94-AUDI-1...ht_1800wt_1110

These injectors seem like the perfect match. Stock e30 injectors are high impedance, top feed, <b>152.4 cc/min</b> injectors. Their drawback however is that they are single pintle design

These are high impedance, top feed, <b>149.8 cc/min</b> injectors that utilize a 4 pintle design.

So there we have it. I haven't tried these myself, or have heard of anybody who has, but please share your thoughts!