[Joe Boucher]

> >
> > Mr Guru,
> >
> > Are the GM TBI injectors tuneable?  Someone posted the discovery of
> > three small spot welds around a screw on the centerline of the
> > injector.  Looks like an adjustment screw.

[snip]

> > Joe Boucher
> > '70 RS/SS Camaro  '81 TBI Suburban
> 
>   Joe, No problem with the info part.  go to   www.lindertech.com for more and will
> post more there as time goes on.
> 
> The tbi's are somewhat tuneable bu by the time you break the spot weld and mess with
> them it is usually not worth your time.
> Remember the injector is told what to spray based on a map of opening s in ms. So
> actual flow change , against spring tension only has large effect at wot and even
> then questionable.
> There are many different flow rates of tbi units for different engines.
> We stock these units and flow them on a test bench.
> Would flow a set and try for more fuel if ya have a extra set to experiment with
> though.
> 
> Jim Linder
> the injector " guru"

So, Gm didn't spec one size TBI injector and screw it in 5 turns for a
4.3, 4 turns for a 5.0, 3 turns for a 5.7, 2 turns for a 454, and one to
no turns for a God-knows-what, in other words.  

Cool, that's what I was after.

Joe Boucher
'70 RS/SS Camaro   '81 TBI Suburban