GM TBI Injectors

Kevin Vannorsdel kv at us.ibm.com
Wed Oct 15 16:18:06 GMT 1997


Sorry but my mail tools may have lost a reply or two----  did anyone ha=
ve a
comment on finding the CFM ratings for GM throttle bodies?

________________________________________________
  Kevin Vannorsdel     IBM Arm Electronics Development
    408-256-6492                Tie 276-6492     kv at us.ibm.com






owner-diy_efi at coulomb.eng.ohio-state.edu on 10/13/97 02:58:34 PM
Please respond to diy_efi at coulomb.eng.ohio-state.edu @ internet
To: diy_efi at coulomb.eng.ohio-state.edu @ internet
cc:
Subject: Re: GM TBI Injectors


Yup.  That simple.  I've played with this on junk throttle bodies in th=
e 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 archi=
ves 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 re=
ference
> > that would tell me the flow rate of the injectors via looking up th=
e part
> > number.
> >
> >         Is adjusting the flow rate on the injectors as simple as dr=
illing
> > the three small welds on the allen screw and turning the screw to t=
he
> > desired flow?  I noticed that the screw height varies with differen=
t
> > 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 wa=
s
> something internal that couldn't be adjusted.  If this is true, you h=
ave
> stumbled on a great find.  With the proper setup, you could adjust ea=
ch
> 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






=



More information about the Diy_efi mailing list