Drilling fuel rail (10vt)

[Marc Swanson]

On Sunday 17 February 2002 06:10 pm, Michael Gough wrote:
> Hey list!
> I'm finishing up the EFI project right now (all components in hand, just
> installation left, should happen this week) and I need some advice for
> drilling the fuel rail. I have 2 feet of rail stock, and I need to know how
> to drill the holes for the injectors- what size bit to use, what type of
> bit, etc. Any help would be greatly appreciated.


you need one 3/8 bit to drill a hole all the way through into the fuel
passage and a 35/64ths for the o-rings to seal.  Drill this one down as far
as you can without actually going into the fuel passage.. thus creating a
"stop" for the injectors.  HSS (High Speed Steel) drill bits will work just
fine.  I bought mine from MSC Industrial.  I think Nate got away with using a
uni-bit but I'm not sure what kind to get the same "stepped" effect without
using two bits.

Oh, and you'll need a 9/16 18 (fine thread) tap for -6 AN unions to screw
into either end.


HTH

-Marc-
87 4ktq
88 90q