injectors and rails

[Johnny]

As for the injector holes, a couple things. You may find that you don't
have enough material on the intake runner to make a good seat for the
injector, or at least not at the angle you want to put the injectors at.
You might have to weld bosses (assuming aluminum here) to the runners and
then drill the holes through those and the runners. the bosses can be made
from round stock by simply cutting off pieces at the correct angle to give
you the desired boss and angle. 

Other thing is when drilling the holes, I would suggest drilling with a
slightly smaller bit and then use a reamer to get to the finished size. You
probably won't get a good clean hole for the O-ring to seat on otherwise.

As for mounting the rails, you can machine standoffs that a manifold bolt
goes through. Drill a hole cross wise through the standoff slightly smaller
than the fuel rail's largest dimension. Drill 2 more holes in each that
will hold the top of the hole you drilled to the bottom. Cut through the
center of the big hole to make a clamp out of the Stanton and thread the
bottom half of the 2 holes. Resize the top half of the holes so you can get
the bolts in (#10's are plenty). When you are all done, you bolt the
standoffs down, plug the injectors into the manifold, plug the fuel rail
onto the injectors and into the cradles of the standoffs, put the caps on
the standoffs, and put the 2 little bolts in each to hold it together. You
could make the whole setup in 1 day at your buddy's machine shop. Might
take you 2 days if your friend with the TIG isn't the same friend as the
one with the mill.

Materials include some 1 in. 6061-T6 round stock for the bosses and 1 inch
square stock for the standoffs

Now for the crude way...
Take some 1 x .125 steel bar and drill a hole in the end the size of a
manifold bolt. Bend the end with the hole so that the bar goes over the
fuel rail when the bar is bolted down with the manifold bolt (might need to
heat it with a torch and use a vice). Cut the bar 2 or 3 inches past the
point where it goes over the fuel rail. Bend a U in the end to hold the
fuel rail down.  Coat with plenty of black paint to keep it from rusting
and to hide the hammer and vice marks. Repeat 3 more time to make 4 total.

-j-

----------
> From: James Weiler <james at brc.ubc.ca>
> To: diy_efi at coulomb.eng.ohio-state.edu
> Subject: injectors and rails
> Date: Friday, March 07, 1997 12:45 PM
> 
> 
> Gentlemen:
> 
> I've got a single plane intake and an old carb for a throttle body.  Now 
> I want to drill holes and install 8 injector bosses and injectors/fuel
rail.
> (then engine is a 351-C)
> 
> Any advice?
> 
> I'd like to use O-ring injectors (the hoses on a type 6 injector make me 
> nervous).  Anybody got a clever idea an to how to fasten down the fuel 
> rail to the intake?
> 
> I've seen one setup that drilled a hole through the manifold and ran a 
> bolt up through the hole into the bottom of the fuel rail (which had been

> threaded to accept the bolt)  This looked nice but you'd have to remove 
> the manifold just to service the injectors.  Sort of a bad design bbut if

> people tell me I'll rarely need to service the injectors then I'll 
> consider this option.
> 
> Thanks in advance
> jw