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oldskool3
08-10-2006, 11:13 PM
Hey guys I am looking to upgrade my injectors and I was wondering should I go with 19lb injectors or ones out of an s52. I have heard that the s52 ones are better. Any opinions? Thanks

The Sly
08-11-2006, 07:03 PM
Did you not get some allready?

The Sly
08-11-2006, 07:14 PM
BTW if anyone is interested ..I have a set of M30 injectors for sale..

Oh and here is some pictures of a rebuilt on the way from Jesse's E30
M20b25
Being rebuilt also is a highly modified 34cc "i" head included a 272/272 11.5mm lift cam.

ENGINE BAY
http://img.photobucket.com/albums/v294/the_sly/2006jessesengine006.jpg

ENGINE BLOCK with new timing belt, tensioner and water pump.
http://img.photobucket.com/albums/v294/the_sly/2006jessesengine002.jpg
http://img.photobucket.com/albums/v294/the_sly/2006jessesengine007.jpg
http://img.photobucket.com/albums/v294/the_sly/2006jessesengine001.jpg

SLy

Soldo
08-11-2006, 07:46 PM
I have a set of blue injectors from a 95 325i, dunno how much they are, but lemme know if your interested

Mystikal
08-12-2006, 10:05 AM
For what motor?

In a 2.5, either is overkill. M50/S50 17.5lb/hr's are a much better match.

The Sly
08-12-2006, 05:32 PM
There you go Jesse...More pictures of your E30..
http://img.photobucket.com/albums/v294/the_sly/2006jessesengine008.jpg

http://img.photobucket.com/albums/v294/the_sly/2006jessesengine009.jpg

Lee in Ottawa
08-12-2006, 05:42 PM
sly just got your pm. Looking good. Too bad the other parts never showed up.

sadi arbid
08-21-2006, 11:16 PM
what will the upgrade in the injetcors do ?

Anyone has the 17 lbs/S52 ?

PM how much ?

Any other things to change ? fuel regulator etc....

Thanks

Soldo
08-22-2006, 12:16 AM
What injectors came with the M50 motors?

Bob Loblaw
08-22-2006, 07:34 AM
ENGINE BLOCK with new timing belt, tensioner and water pump.
http://img.photobucket.com/albums/v294/the_sly/2006jessesengine002.jpg

SLy

So it'll be running on propane, eh? ;)

Mystikal
08-22-2006, 11:36 AM
What injectors came with the M50 motors?

Same as S50. 17.5lb.

sadi arbid
08-23-2006, 09:01 AM
What will the injectors do ?

What modifications are needed ?

How does you engine know you are dumping more fuel ? by the O2 sensor !

How does it adjust for that ?

What are the gains ?

Thanks for the help.

Mystikal
08-23-2006, 09:56 PM
They spray more fuel.

Nothing. But injectors alone will only hurt power output.

It doesn't know. That's why it works.

It doesn't adjust, early Motronic isn't very adaptive.

Gains only if you maxed out the stock injectors with other mods.

sadi arbid
08-24-2006, 09:12 AM
:confused:

If you dump more fuel by swapping to larger flow injectors, you will run rich ! That will not produce more power .....unless you burn it.

To burn it, you need more O2 intake.....

How are you increasing your O2 intake ? I am not aware of any ways to increae O2 except turbo/supercharge/maybe increase thottle boar !! etc....

Your O2 sensor will detect rich mixture and cut back on fuel.....so even if you increase injector flow rate....the ECU will cut back as it detects rich.

Am I missing something ?

Please advise.

Halfbroken
08-24-2006, 01:59 PM
He might be also switching to m30 AFM and chipping?

:confused:

If you dump more fuel by swapping to larger flow injectors, you will run rich ! That will not produce more power .....unless you burn it.

To burn it, you need more O2 intake.....

How are you increasing your O2 intake ? I am not aware of any ways to increae O2 except turbo/supercharge/maybe increase thottle boar !! etc....

Your O2 sensor will detect rich mixture and cut back on fuel.....so even if you increase injector flow rate....the ECU will cut back as it detects rich.

Am I missing something ?

Please advise.

He might be also switching to a an m30 AFM and chipping?

Mystikal
08-26-2006, 10:34 AM
:confused:

If you dump more fuel by swapping to larger flow injectors, you will run rich ! That will not produce more power .....unless you burn it.

To burn it, you need more O2 intake.....

How are you increasing your O2 intake ? I am not aware of any ways to increae O2 except turbo/supercharge/maybe increase thottle boar !! etc....

Your O2 sensor will detect rich mixture and cut back on fuel.....so even if you increase injector flow rate....the ECU will cut back as it detects rich.

Am I missing something ?

Please advise.

Read the last line in my post again. You upgrade your injectors if the stock ones are maxed out, which is very easy to do. Read this thread: http://www.maxbimmer.com/forums/showthread.php?t=55842

And the E30's Motronic, like I said, really does not adapt to rich/lean conditions.