Injector geometry

[Squash]

It seems to me that most if not all of these types of
manifolds i have seen have the injectors mounted
straight up.

Andy

--- Frederic Breitwieser <frederic at xephic.dynip.com>
wrote:
> > I am ready to poke some holes for injectors in my
> mopar 440 tunnel ram.
> > My question is it appears that I will not be able
> position the injectors
> > to point directly at the back of the intake valve.
> How important is
> > this? The injectors are 36# Ford Motor sports
> units.
> 
> Ya, tunnel rams have very long, downward tubes.  You
> should try to
> inject at the valve backs the best you can, but its
> not mission
> critical.  You might consider milling the injector
> boss holes on an
> angle, to inject it into the airstream.  I chose to
> keep it real simple
> and bore perpendicular to the valley plane, and
> after testing the design
> on the engine, its okay and I'm not really worried
> about it.
> 
> > However this will make for some difficult
> machining in a tight spot.
> 
> Machine from the intake ports upwards through the
> runners on an angle...
> then weld the bosses in, then grind enough of the
> inside of the boss
> away that the injector still seals good, yet is
> slightly exposed
> tip-wise.
> 
> Honestly, Unless you are building a very high
> performance engine, its
> not the most critical thing in the world from what I
> can tell with my
> 383 stroker (431 cid).
> 
> I used a streetmaster aluminum intake.
> 
> http://www.xephic.dynip.com/dodge/dodge.html
> 
> Off the left-handed menus, select "Engine" then
> "383swap" then "EFI
> Intake", and you can see what I ended up with.
> 

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