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-   -   diy dual feed fuel rail confusion (https://www.miataturbo.net/diy-turbo-discussion-14/diy-dual-feed-fuel-rail-confusion-9925/)

curly 05-17-2007 02:02 AM

diy dual feed fuel rail confusion
 
hey I was looking at brianeack's diy dual feed fuel rail write up, and I'm in need of a little clearification. with everything installed in the car, and if you're face to face with the front of your car, am I drilling and tapping the 'front' or the 'rear' of the fuel rail? the picture make it out to be the rear, but isn't it getting fed by the pressure regulator? or is it being fed at the front and then going through the pressure regulator. if that's the case and it looks like it is, I think I've had the wrong impression/ideas about the vortech afpr/stock fpr setup.:td: thanks for any and all help, if anyone has some more pictures, maybe of their diy rail installed in their car, that'd be great. :bigtu:

P.S. yes I searched, didn't seem to find what I needed.

turbopezz 05-17-2007 02:26 AM

do it just like brain has it pictured.the

timhill78 05-17-2007 02:29 AM

Just did that mod last week. It's just like it's pictured.

Ben 05-17-2007 06:47 AM

Fuel enters in the front, the FPR is the fuel return.
You want to add your barb in the rear of the rail. Or get jiggy and add a barb at each injector.

speedracerTD04 05-17-2007 11:07 AM


Originally Posted by Ben (Post 114441)
Fuel enters in the front, the FPR is the fuel return.
You want to add your barb in the rear of the rail. Or get jiggy and add a barb at each injector.

has anyone done that with their stock fuel rail??!?!!?!?!

Braineack 05-17-2007 11:57 AM


Originally Posted by speedracerTD04 (Post 114524)
has anyone done that with their stock fuel rail??!?!!?!?!

https://www.miataturbo.net/braineack...anndinator.gif

speedracerTD04 05-17-2007 02:00 PM


Originally Posted by Braineack (Post 114545)

i'll take that as either no, or that's a dumb idea.

speedracerTD04 05-17-2007 02:47 PM

I was talking about what Ben said about putting a barb to each injector...on a stock fuel rail i was wondering if anyone has done THAT. not tap just the one end.

speedracerTD04 05-17-2007 02:55 PM

easy for you to say on the internet.

Braineack 05-17-2007 03:02 PM

yes, that has been done as well.

jayc72 05-17-2007 03:03 PM

The thread has NOT been answered. Have you seen someone tap the stock rail behind each injector and install a hose barb?

jayc72 05-17-2007 03:04 PM


Originally Posted by Braineack (Post 114604)
yes, that has been done as well.

Who did it? Link? Pictures?

Newbsauce 05-17-2007 03:06 PM


Originally Posted by jayc72 (Post 114606)
Who did it? Link? Pictures?

I will see if I can dig up the thread/pics.

curly 05-17-2007 03:10 PM

Technically the thread was answered; Ben answered my question/curiosity about the fuel pressure regulator feeding the rail or the tank.

speedracerTD04 05-17-2007 03:18 PM

i'd really rather just be banned from this site...as much as it has helped me out, seems like some people just don't get along.

apparently people can't ask questions anymore without being attacked.

jayc72 05-17-2007 03:21 PM


Originally Posted by speedracerTD04 (Post 114616)
i'd really rather just be banned from this site...as much as it has helped me out, seems like some people just don't get along.

apparently people can't ask questions anymore without being attacked.

Don't be a fucking victim. I hope you aren't crying now ...

If you act like this of course people are going to give you a hard time, it's entertainment.

EDIT: DING DING DING :gay:

Braineack 05-17-2007 03:22 PM


Originally Posted by jayc72 (Post 114606)
Who did it? Link? Pictures?

i remember seeing it somwhere...i think it's over the top, but let me search.

speedracerTD04 05-17-2007 03:25 PM

http://images.search.yahoo.com/searc...06dee&ei=UTF-8

this helped me better identify the parts of the fuel rail.

but now that i am researching it...it doesn't make much sense to do that, unless of course...

this is nutsss.. http://www.youtube.com/watch?v=o_QyUD6V5_I

Braineack 05-17-2007 03:32 PM


Originally Posted by curly (Post 114426)
with everything installed in the car, and if you're face to face with the front of your car, am I drilling and tapping the 'front' or the 'rear' of the fuel rail?

Rear, closest to the firewall.


the picture make it out to be the rear, but isn't it getting fed by the pressure regulator?
no, the rail is a retun system....so fuel enters the front, and exits back to the tank through the fpr.


or is it being fed at the front and then going through the pressure regulator. if that's the case and it looks like it is, I think I've had the wrong impression/ideas about the vortech afpr/stock fpr setup.
correct, what was your impression of FMUs? they clamp down on the return line and increase pressure back in the rail....just like putting your thumb over a water hose when watering the plants.

[/quote]

curly 05-17-2007 04:21 PM

I guess I didn't have a lot of knowledge about FMUs. I was alwasy curious as to why the fuel tank was pressurized (opening the cap lets out the pressure) all makes sense now though.

I checked out a 1/8NPT tap and sharpened 11/32 HSS drill from the tool crib at work, and will hopefully be drill/tapping this weekend.


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