Click to go to Forum Home Click to go to maXbimmer Home

Go Back   maXbimmer Forums > maXimum Tech > 3 Series > E30 (1983 - 1991)
User Name
Password


Welcome to Maxbimmer.com!

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Reply
 
Thread Tools Rate Thread Display Modes
Old 08-11-2006, 12:13 AM   #1
oldskool3
4th Gear Member
 
oldskool3's Avatar
 
Join Date: Oct 2004
Location: Montreal
Posts: 1,305
s52 or 19lb

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
oldskool3 is offline   Reply With Quote
Old 08-11-2006, 08:03 PM   #2
The Sly
5th Gear Member
 
The Sly's Avatar
 
Join Date: Aug 2002
Location: L'Ange Gardien, Qc CANADA
Posts: 1,097
Did you not get some allready?
__________________
The Sly is offline   Reply With Quote
Old 08-11-2006, 08:14 PM   #3
The Sly
5th Gear Member
 
The Sly's Avatar
 
Join Date: Aug 2002
Location: L'Ange Gardien, Qc CANADA
Posts: 1,097
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


ENGINE BLOCK with new timing belt, tensioner and water pump.




SLy
__________________
The Sly is offline   Reply With Quote
Old 08-11-2006, 08:46 PM   #4
Soldo
6th Gear Member
 
Soldo's Avatar
 
Join Date: Oct 2002
Location: Toronto
Posts: 12,484
I have a set of blue injectors from a 95 325i, dunno how much they are, but lemme know if your interested
__________________
Keven Soldo
Soldo is offline   Reply With Quote
Old 08-12-2006, 11:05 AM   #5
Mystikal
Moderator/Event-Coordinator
 
Join Date: Feb 2002
Location: Stance
Posts: 12,845
For what motor?

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

@stancejay
Mystikal is offline   Reply With Quote
Old 08-12-2006, 06:32 PM   #6
The Sly
5th Gear Member
 
The Sly's Avatar
 
Join Date: Aug 2002
Location: L'Ange Gardien, Qc CANADA
Posts: 1,097
There you go Jesse...More pictures of your E30..


__________________
The Sly is offline   Reply With Quote
Old 08-12-2006, 06:42 PM   #7
Lee in Ottawa
5th Gear Member
 
Lee in Ottawa's Avatar
 
Join Date: Apr 2004
Location: Ottawa
Posts: 1,058
sly just got your pm. Looking good. Too bad the other parts never showed up.
__________________
Lee in Ottawa is offline   Reply With Quote
Old 08-22-2006, 12:16 AM   #8
sadi arbid
La Klasic
 
Join Date: Mar 2005
Location: Burlington
Posts: 45
Need opinion and info.

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
__________________
La Klasic
sadi arbid is offline   Reply With Quote
Old 08-22-2006, 01:16 AM   #9
Soldo
6th Gear Member
 
Soldo's Avatar
 
Join Date: Oct 2002
Location: Toronto
Posts: 12,484
What injectors came with the M50 motors?
__________________
Keven Soldo
Soldo is offline   Reply With Quote
Old 08-22-2006, 08:34 AM   #10
Bob Loblaw
Zee Frog.
 
Bob Loblaw's Avatar
 
Join Date: Aug 2002
Location: Gatineau, Québec
Posts: 2,305
Quote:
Originally Posted by The Sly
ENGINE BLOCK with new timing belt, tensioner and water pump.


SLy
So it'll be running on propane, eh?
__________________
Bob Loblaw is offline   Reply With Quote
Old 08-22-2006, 12:36 PM   #11
Mystikal
Moderator/Event-Coordinator
 
Join Date: Feb 2002
Location: Stance
Posts: 12,845
Quote:
Originally Posted by Soldo
What injectors came with the M50 motors?
Same as S50. 17.5lb.
__________________

@stancejay
Mystikal is offline   Reply With Quote
Old 08-23-2006, 10:01 AM   #12
sadi arbid
La Klasic
 
Join Date: Mar 2005
Location: Burlington
Posts: 45
too many questions needing answers from the PROs

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.
__________________
La Klasic
sadi arbid is offline   Reply With Quote
Old 08-23-2006, 10:56 PM   #13
Mystikal
Moderator/Event-Coordinator
 
Join Date: Feb 2002
Location: Stance
Posts: 12,845
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.
__________________

@stancejay
Mystikal is offline   Reply With Quote
Old 08-24-2006, 10:12 AM   #14
sadi arbid
La Klasic
 
Join Date: Mar 2005
Location: Burlington
Posts: 45
More confuse...



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.
__________________
La Klasic
sadi arbid is offline   Reply With Quote
Old 08-24-2006, 02:59 PM   #15
Halfbroken
2nd Gear Member
 
Join Date: Apr 2006
Location: Toronto
Posts: 87
He might be also switching to m30 AFM and chipping?

Quote:
Originally Posted by sadi arbid


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?
Halfbroken is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 08:47 PM.


Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Maxbimmer Copyright 2001 - 2014