Notices
928 Forum
Sponsored by:
Sponsored by: 928 Specialists

Injectors - choosing the right Design III (and some II info)

 
Old 08-24-2018, 08:55 PM
  #136  
Kevin in Atlanta
Addict
Rennlist Member
 
Join Date: May 2002
Location: Roswell, GA
Posts: 4,991
Default

I just bought orange top four hole injectors and my vendor cuts a slot in the correct location of our injector rails.
Kevin in Atlanta is online now  
Old 08-25-2018, 02:23 AM
  #137  
The Forgotten On
Addict
Rennlist Member
 
Join Date: May 2012
Location: Thousand Oaks California
Posts: 3,203
Default

I installed a set of design III in a 944 and I had to cut slots. I used a hack saw because it's easier to control and cuts a cleaner slot that the dremmel can.

Use 19lb injectors if staying stock or go to 24lb injectors and sharktune away.

The 24lb set I used in the 944 are purple/pink Ford Bosch injectors which have IIRC 6 holes. So far they have worked very well and improved idle substantially with the finer atomization they have.
The Forgotten On is offline  
Old 08-25-2018, 03:05 PM
  #138  
ROG100
Addict
Rennlist Member


Rennlist
Site Sponsor

 
ROG100's Avatar
 
Join Date: Jan 2003
Location: Double Oak, TX
Posts: 15,605
Default

I have stopped selling the design III because there are so many variations with or without the correct slot for the lock ring to the injector rail.
Some have a larger diameter at the top which is not so apparent even if you stick to the correct Bosch number. This looks fine until you install the lock ring and it bulges and does not hold the injector correctly.
Stick with Design II if you do not know what you are doing.
__________________


Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014

928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
ROG100 is offline  
Old 01-06-2019, 12:38 AM
  #139  
Michael Benno
Addict
Rennlist Member
 
Michael Benno's Avatar
 
Join Date: Mar 2015
Location: Portland, OR
Posts: 946
Default Bosch 0 280 155 884

What a fantastic thread!

Based on the information in this thread I decided to pull the trigger on some new injectors, rather than refurb my old injectors (in the middle of intake redo). I liked the idea of the improved fuel atomization of the 4-hole spray pattern over the single hole injector. I noted the concerns about variations on the design III and potential fitment issues associated with the groove for the retaining clip. However, I decided to go with these Bosch 0 280 155 884 Design III injectors and verify the injector clip.



I received the injectors today and gave them a test fit into the the fuel rails and they seem to fit perfectly. I used a little synthetic grease to make sure they were properly seated. The injectors came with the 928 specific 16.5mm lower O-rings too.









Monday, I'll bring them into my friends auto shop and we will bench flow these against my stock 150K mile stock injectors. I'll post a video for your viewing pleasure
Michael Benno is offline  
Old 01-26-2019, 12:17 PM
  #140  
Luis A.
Addict
Rennlist Member

 
Luis A.'s Avatar
 
Join Date: Aug 2001
Location: Milwaukee, WI
Posts: 593
Default

Originally Posted by Michael Benno View Post
What a fantastic thread!

Based on the information in this thread I decided to pull the trigger on some new injectors, rather than refurb my old injectors (in the middle of intake redo). I liked the idea of the improved fuel atomization of the 4-hole spray pattern over the single hole injector. I noted the concerns about variations on the design III and potential fitment issues associated with the groove for the retaining clip. However, I decided to go with these Bosch 0 280 155 884 Design III injectors and verify the injector clip.



I received the injectors today and gave them a test fit into the the fuel rails and they seem to fit perfectly. I used a little synthetic grease to make sure they were properly seated. The injectors came with the 928 specific 16.5mm lower O-rings too.









Monday, I'll bring them into my friends auto shop and we will bench flow these against my stock 150K mile stock injectors. I'll post a video for your viewing pleasure
Hi Michael,

Did you ever get the video done...? Would love to see it.
Luis A. is offline  
Old 01-26-2019, 06:33 PM
  #141  
Michael Benno
Addict
Rennlist Member
 
Michael Benno's Avatar
 
Join Date: Mar 2015
Location: Portland, OR
Posts: 946
Default

Originally Posted by Luis A. View Post
Hi Michael, Did you ever get the video done...? Would love to see it.
yep, see this post 33 in this thread

https://rennlist.com/forums/showpost...9&postcount=33
Michael Benno is offline  

Thread Tools
Search this Thread
Quick Reply: Injectors - choosing the right Design III (and some II info)


Contact Us - About Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: