Results 1 to 8 of 8
  1. #1

    Join Date
    Nov 2021
    Location
    Ontario
    Posts
    34
    +1
    3

    interesting injector information

    I'm going through my RXP-X to see what I bought. A previous owner did many Riva bolt-on mods, and the guy I bought it from had no idea what had been done to it.

    I looked up my injectors to see if they are OEM or aftermarket, and I found out something interesting.

    They're made in China by a company called DEFUS
    (https://www.df-fuelinjector.com/0280...lia-08-14-4-0i)



    for the Australian Ford Falcon!





    The 4.0L inline 6 turbo in this ute makes 360 HP.



    The website doesn't specify the flow rate. I just says, "same as original."

    Are these OEM for a Rotax 1630? Does anyone recognize them? Or did someone get creative and swap these in?

  2. #2
    ptscon's Avatar
    Join Date
    Jul 2013
    Location
    Toronto
    Posts
    5,049
    +1
    1,102
    Sorry but those are trash. I did a flow test on those and they flow like a garden hose, zero atomization and forget about any consistent flow rate. China can make decent stuff but those injectors are garbage.


    Here is how they flow, 3 on the left are OEM and the one on far right is defus, it's a garden hose flow pattern.





    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	chineseinjector.jpg 
Views:	278 
Size:	96.5 KB 
ID:	481294   Click image for larger version. 

Name:	chineseinjector2.JPG 
Views:	274 
Size:	93.1 KB 
ID:	481295  


  3. #3

    Join Date
    Sep 2017
    Location
    London UK
    Posts
    340
    +1
    55
    I have seen injectors with spray patterns intentionally like that but they are normally secondary injectors that spray directly at the top of the velocity stack or are part of a throttle body injector setup. All in all economizing on injectors is a big gamble.

  4. +1 by:


  5. #4

    Join Date
    Nov 2021
    Location
    Ontario
    Posts
    34
    +1
    3
    I'm still curious to know if these injectors are stock or if they've been swapped in.
    It's only curiosity. These injectors will never go back in.
    This engine is getting a cam and an 18# wheel. Feeding it fuel will be a set of VT1100s and an RRFPR.

  6. #5
    ptscon's Avatar
    Join Date
    Jul 2013
    Location
    Toronto
    Posts
    5,049
    +1
    1,102
    Quote Originally Posted by canuck coupe View Post
    I'm still curious to know if these injectors are stock or if they've been swapped in.

    Not stock, someone cheap put them in.

  7. #6
    tiderider's Avatar
    Join Date
    Oct 2018
    Location
    Usa
    Posts
    1,269
    +1
    102
    I smell BOOM and why it was sold..

  8. #7

    Join Date
    Nov 2021
    Location
    Ontario
    Posts
    34
    +1
    3
    Quote Originally Posted by tiderider View Post
    I smell BOOM and why it was sold..
    No BOOM found so far.
    I have completely stripped the head.
    Rockers, valves, valve seats, and cam all look and feel perfect. Tops of the pistons and the cylinder walls look excellent.

    I pulled the engine this afternoon. I might crack the crankcase this evening. I don't expect to find anything.

    Leakdown showed 30% loss in every cylinder. So far I haven't found a reason.

  9. #8
    Quote Originally Posted by canuck coupe View Post

    Leakdown showed 30% loss in every cylinder. So far I haven't found a reason.
    Probably valves leaking.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. WTB 2008, 42lb injector to a 2012 48 lb injector. adaptor.
    By dan725 in forum Sea Doo Classifieds
    Replies: 0
    Last Post: 03-15-2016, 11:27 PM
  2. FS - Parts 3 brand new EV1(Siemens) harness to EV6(USCAR/ Injector Dynamics) injector
    By imp0ster in forum Sea Doo Classifieds
    Replies: 0
    Last Post: 04-14-2014, 11:09 AM
  3. FS RIVA / INJECTOR DYNAMICS 1000cc Injector Kit
    By ksalles in forum Yamaha Classifieds
    Replies: 20
    Last Post: 12-27-2012, 07:58 AM
  4. Need injector information on the 215
    By headstrongnhated in forum 4-Tec Performance
    Replies: 6
    Last Post: 07-19-2012, 09:30 AM
  5. interesting...
    By Small Paul in forum eBay Finds
    Replies: 1
    Last Post: 10-01-2010, 08:32 AM

Posting Permissions

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