GM TBI Injectors

[Shannen Durphey]

Yup.  That simple.  I've played with this on junk throttle bodies in the shop.  A
garage about 45 mi. from here will clean and flow match injectors for $15 ea.

Anyone know where to get CFM ratings for GM throttle bodies?  GM doesn't publish
any.

Joe Boucher wrote:

> Ed wrote:
> >
> > Hello All,
> >
> >         I'm new to the list and I just finished searching the archives on
> > any info on GM TBI injectors and couldn't find what I'm looking for.  I have
> > a 92 S-10 4.3l TBI and am trying to find out if there is a cross reference
> > that would tell me the flow rate of the injectors via looking up the part
> > number.
> >
> >         Is adjusting the flow rate on the injectors as simple as drilling
> > the three small welds on the allen screw and turning the screw to the
> > desired flow?  I noticed that the screw height varies with different
> > displacement engines.  I made my fuel pressure regulator adjustable by
> > drilling the weld out and am pleased with that mod.  Thanks.
> >
> >                                                         Ed
>
> I've always assumed that the difference in the different injectors was
> something internal that couldn't be adjusted.  If this is true, you have
> stumbled on a great find.  With the proper setup, you could adjust each
> injector within a few percent of each other.  But being the pessimist, I
> can't believe it's that simple.
>
> Joe Boucher
> '70 RS/SS Camaro  '81 TBI Suburban