Page 1 of 2 1 2 LastLast
Results 1 to 10 of 19
  1. #1
    Avi8tor's Avatar
    Join Date
    May 2012
    Location
    Greenville, NC
    Posts
    826
    +1
    27

    Siemens vs Bosch injectors

    Which one has the better flow pattern? Bosch have the 4 hole design, Siemens just the one. Does it make any appreciable difference?

    Left black/blue one is siemens 80lb, right is a bosch 60lb
    Click image for larger version. 

Name:	20120922_142946.jpg 
Views:	491 
Size:	38.2 KB 
ID:	283725


  2. #2
    Eric Ocman's Avatar
    Join Date
    Aug 2008
    Location
    Cataula, Georgia, United States
    Posts
    4,700
    +1
    77
    Decide for yourself


  3. #3
    boost junkie skidoochris's Avatar
    Join Date
    Mar 2012
    Location
    Davison, Mi
    Posts
    4,494
    +1
    476
    have them flow tested, and not just max flow and let the numbers do the talking

  4. #4
    Avi8tor's Avatar
    Join Date
    May 2012
    Location
    Greenville, NC
    Posts
    826
    +1
    27
    Yeah, thats pretty impressive pattern difference Even with exact same flow rate, what the narrator of video says about the stream of siemens during flow rate test near end makes sense.
    Found this also that shows basically the same thing about how the bosch atomize better. I would THINK that better atomization would = better performance and more complete combustion? I JUST installed siemens 80lb today on my ski and was hoping they performed the same ( other than flow rates) these videos show that may not be the case?

  5. #5
    Eric Ocman's Avatar
    Join Date
    Aug 2008
    Location
    Cataula, Georgia, United States
    Posts
    4,700
    +1
    77
    IMO More surface flow = Cooler pistons, no hotspots etc.

  6. #6
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    Location
    CT
    Posts
    25,929
    +1
    1,407
    Boom!

  7. #7
    Avi8tor's Avatar
    Join Date
    May 2012
    Location
    Greenville, NC
    Posts
    826
    +1
    27
    Quote Originally Posted by beerdart View Post
    Boom!
    Here comes the BOOM!

  8. #8
    Sayers's Avatar
    Join Date
    Jul 2010
    Location
    Melbourne AUS
    Posts
    2,300
    +1
    134
    Quote Originally Posted by Ocman View Post
    Decide for yourself

    Quote Originally Posted by Avi8tor View Post
    Yeah, thats pretty impressive pattern difference Even with exact same flow rate, what the narrator of video says about the stream of siemens during flow rate test near end makes sense.
    Found this also that shows basically the same thing about how the bosch atomize better. I would THINK that better atomization would = better performance and more complete combustion? I JUST installed siemens 80lb today on my ski and was hoping they performed the same ( other than flow rates) these videos show that may not be the case?

  9. #9
    Avi8tor's Avatar
    Join Date
    May 2012
    Location
    Greenville, NC
    Posts
    826
    +1
    27
    Ran them back to back today. Obviously in the videos its a huge difference, in real world they ran the same in my setup. 91.2mph best with bosch injectors and 91.4 mph best speed with the siemens 80lb though the tank was lower on fuel so I'd say its mute point. Don't know if there was much difference in fuel economy or part throttle operation as I really only mapped the 80lb injectors for idle and wot afrs.

    I decided to just keep running the bosch for now.
    Last edited by Avi8tor; 09-23-2012 at 12:08 PM.

  10. #10
    Having Fun jp1300r's Avatar
    Join Date
    Sep 2005
    Location
    Florida
    Posts
    5,334
    +1
    261
    Why not Seimens 60lb injectors, if you can run 60lb injectors. You may like this spray pattern.

Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Siemens vs Bosch injectors
    By kpracing12 in forum 4-Tec Performance
    Replies: 3
    Last Post: 11-10-2013, 08:00 AM
  2. Bosch Injectors/How hard to pull the motor?
    By Envy in forum 4-Tec Performance
    Replies: 12
    Last Post: 05-13-2011, 03:27 PM
  3. 48 Bosch injectors with Riva ECU
    By GarageX in forum 4-Tec Performance
    Replies: 10
    Last Post: 04-18-2011, 06:45 AM
  4. FS 42lb Bosch Injectors
    By Speed_Freak_039A in forum Sea Doo Classifieds
    Replies: 2
    Last Post: 07-14-2010, 10:04 PM
  5. 42LBs vs 38LBS injectors
    By Helinut in forum 4-Tec Performance
    Replies: 13
    Last Post: 07-02-2009, 10:12 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •