Depending on the carb, you may be able to buy jets. I used to do that for
my old Quadra Jet. The jets would be stamped with a number for easy ID.
IIRC, the jets were in .001" increments, so there would be some
gaps/overlaps in a drill kit.
Remember that if you drill, the cross sectional area of the hole increases
by the square of the diameter. Doulble the diameter of the hole and the
area is 4X as big.
Also at least some jets have a metering rod through the hole, so
increasing the "clearance" just slightly would result in a
If you buy the jets, you know they will match each other (if doing more
than one) Drilling may result in jet to jet variation unless you have the
proper tools/skill level.
If you insist on drilling them, I'd measure the jet and then buy the
appropriate drill instead of buying a complete set of bits. Drill less
than you think you want! You can always drill it larger, but not the other
Thanks Guys but my mechanic lives in Mexico and he can not run down to
Pep Boys. I am going to have the drill bits brought down for him so I
have to have some idea of where to start in smallest to largest to do
the job, as I said I think they are what they call # drills 1,2,3 and
so on, could be wrong, never needed to buy them before Gracias
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.