Comptech Fuel Rails - what size is the outlet hole fitting?

[NSX-Files]

Anyone know the hole thread size / type for the rear Comptech fuel rail where it goes to the fuel pressure regulator? Is it 1/8" NPT? I want to install my AEM FPR using the Science of Speed CT / Comptech Supercharger Fuel Rail Adaptor however the AEM is bigger than a stock Honda FPR so it won't clear where the timing belt cover is. So I want to add a couple 90 degree pipe fittings to move the FPR up and over slightly. Before I unbolt the SOS adaptor just curious what size thread fittings I should have on hand.

<img src="http://www.nsxprime.com/photopost/data/1087/image69.jpg" />

<img src="http://www.nsxprime.com/photopost/data/1087/image70.jpg" />

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Ok I answered my own question. The Comptech fuel rails have output holes that are 1/4" NPT. After adding a Walbro 255 HP pump, the factory FPR could not flow enough to keep up with the pressure and had a base pressure of 50psi when it should be 44 max. But because of the way the Comptech rails and SOS adapter push the FPR further towards the timing belt cover, the AEM FPR would not fit. Therefore, I added two 90 degree elbow fittings (got them from Lowes in the plumbing section) to move the SOS adapter up and over about an inch and now I'm able to fit the adjustable regulator and get my pressure down to where I want it. Problem solved!

 

[jwmelvin]

Thank you so much for this post, which saved me from an extremely grumpy mood last night when my regulator was bumping into the timing-belt cover/engine block. I am going to try a variant of your approach. See here.

Update: I managed to mount my regulator with a single 45-degree fitting. See here. It seems like it will have a lot less restriction this way (which therefore makes the rail pressure more consistent and predictable). So far I'm happy with the compact nature of this regulator. I used the middle-sized orifice (0.15") and that seemed to work perfectly with the Deatschwerks DW200 pump I have.