Fuel injection plugs

Bruce Plecan nacelp at bright.net
Mon May 3 00:06:24 GMT 1999


Your saying you've had the secondary metering rod orfices go bad?.
By how much?....
Never saw any worn enough that that worried me.
Finding the optimum opending for the secondary air valve was the PITA for
me.
Well right after digging up all the metering rod hangers, and many needles.
Then I built a jig for blueprinting the hangers..
Once ya got the idle jet, idle channel restrictor right then ya could play
with the primary idle bypasses. Then you just had to diddle with the primary
jets, and dancing needles (ecm content).
   Had one on a LG4 auto that ran 15.0s, and got 30+mph on the freeway.
Same metering also ran 13's on a 355 (crossfire manifold sorta)
Grumpy


> > Quadrajet would have had the most potential of any of them if they had
> > only made replaceable secondary orfices.... once these are worn
> > there's nothing to be done.
> Around 1985 a company called "The Carburetor Shop" offered a kit
> designed to replace the secondary metering jets.  Generally I see worn
> rods, not jets.  Most common seems to be a "ring" worn around the rod
> caused by the rods "rattling" in the stainless plates that make up the
> jets.
> > I've built a puller and removed them, and
> Puller?  I have a drill bit that I've ground to cut the aluminum carb
> away from the jet, then a small pick easily pulls the exposed jet.
> > I suppose you could manufacture a replacement,
> I pull the replacement jet from an unused Q jet.  I buy the carbs
> cheap and strip them for parts.
> Shannen





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