Subject: Fuel Rail
From: Rotary Engine
Date: 5/29/2006, 9:14 AM
To: AAme




Paul-

Got the fuel injection system going yesterday and today.  Regarding the
fuel rail you fabbed for me --

1) I managed to blow it right off the injectors during a test run --
hell of a mess.  Am I correct in assuming you intended the small
diagonal holes on the fuel rail and injector holders to be safety wired
together to prevent this sort of mishap?  Considering the disaster which
would have occurred if the exhaust were cherry-red at the time, keeping
the rail engaged with the injectors is critical.  I'd been wondering
what the diagonal holes were for & I think I just found out...

2) The holes you tapped in it ends of the rail were straight cut,
instead of npt tapered.  I found fittings with integrated rubber washers
to seal the ends, but I am not very confident in them.  This morning
when I flipped the fuel pumps on, one of the washers was distorted & let
loose with a spray of gas -- right onto the exhaust again.  If you make
more rails for yourself or others, make sure to put tapered threads in
the end.  I'm going to trying switching the round rubber washers that
came with the fitting I got & replacing them with flat rubber washers --
I think flat washers will let me crank the fitting down tighter w/o
distorting & creating a fountain.

Mark

Yes the holes are for safety wire. Yes the fittings are straight cut adapters for
O rings as I recall. I think the thread  is 5/8 -20 or something similar to dash 6
AN hose.
You will need a thread gage to check. Also a vernier calbre to measure the
ID.


http://www.bakerprecision.com/adapt8b.htm


Mark, I am almost certain that is a 5/8-20 to dash 6.
The ID of the threads should be around 1/2 inch.
The part number from Baker is 991941

There is no AN part number on it. Made by Earl's.
When you order a new one make sure you get the right
O-ring. As I recall we had problems with those
leaking when crush washers were used.

If the fuel rail threads are buggered Fed Ex the fuel
rail to me and I will make you an improved version.
I need it to get the exact dimensions.

That one was meant to be a prototype.

Paul Lamar ...No rotor no motor.

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