Tapping Primary & Secondary Rails to Accept AN Fittings - RX7Club.com - Mazda RX7 Forum

Go Back  RX7Club.com - Mazda RX7 Forum > Generation Specific > 3rd Generation Specific (1993-2002)
Reload this Page >

Tapping Primary & Secondary Rails to Accept AN Fittings

3rd Generation Specific (1993-2002) 1993-2002 Discussion including performance modifications and Technical Support Sections.

Tapping Primary & Secondary Rails to Accept AN Fittings

Reply

 
 
 
Old 01-09-18, 04:34 AM
  #1  
Full Member
Thread Starter
 
Henry Erazo's Avatar
 
Join Date: Feb 2016
Location: Irving Tx
Posts: 83
Thanks: 0
Thanked 0 Times in 0 Posts
Tapping Primary & Secondary Rails to Accept AN Fittings

In the process in upgrading the fuel system. Iíve searched all over the forums and no luck finding anything that will help. I donít know if anybody is using the Rotary Performance secondary Rail they have in store but it accepts the stock components such as the FPR, FPD, the banjo, etc. Itís an upgrade secondary Rail if planning on going with 2200cc injectors which I am and already have the Rail with injectors. Also I will be removing the stock FPR & FPD and replacing it with an Aeromotive FPR. I will like to know what exactly have you guys done to the stock rails such as the tapping sizes to accept AN fittings or nipples. Iím sticking with the stock fuel lines and just focusing on what can I do to the rails to complete my fuel system.
Henry Erazo is offline  
Reply With Quote
Old 01-09-18, 07:37 AM
  #2  
Rotary Specialists
RX7Club Vendor
iTrader: (11)
 
Banzai-Racing's Avatar
 
Join Date: Jan 2008
Location: Indiana
Posts: 4,497
Thanked 56 Times in 45 Posts
For removing the FPD from the primary rail, bottom of the page has the NPT to -AN fitting FD3s Pulsation Damper Elimination

Tapping your secondary is a little more tricky since I believe it is a welded tube construction. HKS makes an adapter for the factory rail that should work on your rail since it uses the OEM FPR. This will give you the -6an outlet. I have moved away from the Aeromotive FPR because of their size. AEM and Fuelab both make smaller units that can be mounted directly on the rail.

HKS adapter at bottom AEM Regulators
Fuelab Fuel Lab Regulators

Banzai-Racing is online now  
Reply With Quote
Old 01-10-18, 02:41 AM
  #3  
Full Member
Thread Starter
 
Henry Erazo's Avatar
 
Join Date: Feb 2016
Location: Irving Tx
Posts: 83
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by Banzai-Racing View Post
For removing the FPD from the primary rail, bottom of the page has the NPT to -AN fitting FD3s Pulsation Damper Elimination

Tapping your secondary is a little more tricky since I believe it is a welded tube construction. HKS makes an adapter for the factory rail that should work on your rail since it uses the OEM FPR. This will give you the -6an outlet. I have moved away from the Aeromotive FPR because of their size. AEM and Fuelab both make smaller units that can be mounted directly on the rail.

HKS adapter at bottom AEM Regulators
Fuelab Fuel Lab Regulators

Iíve know about the FPD from banzai and yes I will be doing that. I have found an adapter that says itís for the Subaru, Nissan, and Mazda FDREW on the turbosmart website FPR Adapter Subaru/Nis/Maz and at the bottom of the page it shows the dimensions of the adapter. Iím not too sure of the dimensions if it is suited for the secondary Rail inlet or for the Primary Rail. Any feedback on that will very helpful. Also I found this adapter from another website https://www.aeroflowperformance.com/...ers/af64-2064r which I think is the same thing from turbosmart, but again I need an opinion.
Henry Erazo is offline  
Reply With Quote
Old 01-10-18, 05:49 AM
  #4  
Rotary Specialists
RX7Club Vendor
iTrader: (11)
 
Banzai-Racing's Avatar
 
Join Date: Jan 2008
Location: Indiana
Posts: 4,497
Thanked 56 Times in 45 Posts
That is an 1/8"npt hole, I would not want to restrict the fuel output that much. If you want to use it measure your rail.
Banzai-Racing is online now  
Reply With Quote
Old 01-10-18, 11:47 AM
  #5  
Full Member
 
Join Date: Aug 2015
Location: Eugene, Oregon
Posts: 148
Thanked 4 Times in 4 Posts
Just this last weekend I tapped my secondary rail to 1/4 NPT so I could fit an Aeromotive FPR. Now I'm super sad I butchered my rail when I could have had an easier solution like this. These adapters are definitely the better way of doing things! Tapping always makes me uneasy.
newtgomez is offline  
Reply With Quote
Old 01-13-18, 03:24 AM
  #6  
Full Member
Thread Starter
 
Henry Erazo's Avatar
 
Join Date: Feb 2016
Location: Irving Tx
Posts: 83
Thanks: 0
Thanked 0 Times in 0 Posts
Originally Posted by newtgomez View Post
Just this last weekend I tapped my secondary rail to 1/4 NPT so I could fit an Aeromotive FPR. Now I'm super sad I butchered my rail when I could have had an easier solution like this. These adapters are definitely the better way of doing things! Tapping always makes me uneasy.
What exactly went wrong? Did you tapped it straight?
Henry Erazo is offline  
Reply With Quote
Old 01-13-18, 02:12 PM
  #7  
Full Member
 
Join Date: Aug 2015
Location: Eugene, Oregon
Posts: 148
Thanked 4 Times in 4 Posts
Absolutely nothing went wrong and the car runs great but if I can avoid tapping something, I will. If you do tap it, just make sure everything is clean and that you drill deep enough and really run that tap in as far as you can and you won't have any issues. I guess I could have worded that post a little better lol. I had to remove my secondary injector and vacuum the rail and pick out small pieces to make sure it was clean.
newtgomez is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
silverfdturbo6port
3rd Generation Specific (1993-2002)
16
02-13-10 08:12 PM
eddierotary
3rd Generation Specific (1993-2002)
1
01-13-08 06:31 PM
Amur_
2nd Generation Specific (1986-1992)
4
06-03-04 05:54 AM
Turblown
2nd Generation Specific (1986-1992)
5
12-08-02 02:58 PM


Thread Tools
Search this Thread
Quick Reply: Tapping Primary & Secondary Rails to Accept AN Fittings


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

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.