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Trilogy Turbo fuel rail help needed.


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#1 importwarrior

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Posted 13 April 2020 - 01:13 PM

Hello,

i got the fuel rail but the 2 end pieces are gone.
not sure what size they are ?

can anyone help me figure out what the correct size i need to get new ones?

Thanks.

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#2 speedyquest

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Posted 13 April 2020 - 02:50 PM

Go the hardware store and start trying stuff. You'll find out eventually.

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#3 tux

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Posted 13 April 2020 - 03:28 PM

Oh you reminded me I need to grind mine to clear the brake booster port

#4 ucw458

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Posted 13 April 2020 - 06:12 PM

Just JB weld some fuel hose to the ends of the rail.



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#5 Jonathan

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Posted 14 April 2020 - 10:04 AM

From their post a while ago they are 6 or 8an. Some were 10. If this helps.

http://www.starquest...opic=53308&st=0

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#6 obsolete

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Posted 14 April 2020 - 10:32 AM

I haven't seen these in person, but if they are -8 AN, they will be 3/4-16 straight thread, and the fittings you are probably looking for are called -8 ORB (o-ring boss). Good luck.

http://fittingsandad...ej5straigt.html
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#7 kev

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Posted 15 April 2020 - 07:23 AM

They may just be tapped NPT and not ORB.   If they were NPT, the thread would be 3/8-18 tapered (theoretically based on -6AN...its possible they are 1/2-14 tapered for -8AN).   For ORB, it would be either 9/16-18 or 3/4-16 straight based on -6AN or -8AN.  

It's hard to tell when it comes to these fittings.  You can get them in all different combinations.   So -6, -8, or -10AN really doesn't tell you much, you need to know what the rail is.  I'd start with a thread gauge but if it comes out as 18 threads/inch, that still leaves you guessing a bit.  

I'm trying to think of some CQ parts that have the same threads...if memory serves me correctly, the coolant temperature switch is 9/16-18 ORB and I believe the thermosensor is 3/8 NPT.   I'd have to confirm this though.

#8 kev

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Posted 15 April 2020 - 07:42 AM

I read thru Heron's GP thread that was linked above.  It appears they are 3/4-16 straight threads as obsolete stated.   But the problem is that it's difficult to find ORB elbows.  You need an elbow at the rear of the rail due to the limited clearance to the firewall.   Per the thread, Heron started supplying a custom made fitting for the rear of the rail once the issue was brought to light.  

I personally used the factory Magna rail.  There was plenty of meat at both ends to tap for 3/8-18 NPT.  For the rear I used a 3/8 NPT to -6AN elbow and the front 3/8 NPT to -6AN straight fittings.   I removed the factory FPR and tapped/plugged the hole with an 1/8 NPT plug.  

Not the best photo but you can see the front fitting.  I don't have a good pic of the rear but I could take one.   BTW, those rubber Aeroquip lines have since been replaced with steel braided teflon...long story.

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#9 obsolete

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Posted 15 April 2020 - 08:21 AM

Good info, kev. Again, I have no direct experience with these rails but if you need an elbow for that application, you can just use an industrial hydraulic fitting. An example would be Parker 8 C5OX-S. That's a 90 degree fitting that will adapt -8 ORB to -8 AN. Or, if you want to adapt it to -6 AN, you would want a Parker 6-8 C5OX-S.

If you have a local industrial hydraulic dealer, you can walk in there and ask them for a 90 degree elbow from 1/2" ORB (that's the same as -8 ORB) to 1/2" JIC (same as -8 AN) or 3/8" JIC (same as -6 AN). It will probably only be a few dollars, and will save the time/cost of shipping, but with the current quarantine situation, I understand that shipping may be preferable...

If you need to order it, I've had really good experiences buying from MRO Stop:
https://www.mrostop....gree-elbow.html
https://www.mrostop....gree-elbow.html
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