Originally Posted by: HK1837 ![Go to Quoted Post Go to Quoted Post](/Forum/Themes/soclean/icon_latest_reply.gif)
Have a look here:
https://www.gmcmi.com/wp...rimary-Metering-Rods.pdfGTS327 has two primary metering rods listed: 7031843 and 7034845. The second one is the same as HT-HG GTS350 manual (auto uses 7034844), they are the same carby.
The main jet listed is 7031971. Which I believe are 71's. Same as GTS350.
Just go looking in the USA for stuff on these, the 7027213DZ is just a generic 327 4BBL carby for 1967 and any 1968 non AIR applications. Used on manual 240hp, 250hp and 275hp 327 and 295hp + 300hp 350. The AIR versions are 7037213 and 7028213.
7031843 is a 43 rod and 7031845 is a 45 primary metering rod
and 7031971 is a 71 main jet.
GM via Rochester Products made it easy for us in the early days by having the
carb part (re jets, rods) = the part sizing
Didn't do it with secondary rods but DID release a nice big matrix of secondary metering rods
Most USA rebuilders and decent part suppliers (no, NOT Walmart) have this on their sites...
but GM got a bit off track with the later (and NOT compatible with the first type )rod/jet setup
with carbs with #170 part numbers used on XT5 blue motors for example (on WB and VC on Commodores)
re the thread owners question -
I'm looking for info relating to the factory metering rods and jets sizes used in our HK 327 Quadrajets 7027213DZ. What I have is no.43 metering rods and no.71 jets. Is this correct?
Rule of thumb.. starting point with matching rods with jets is the rod number should be 25-30 numbers LESS than the jet number
43 rod with 71 jet is good start
Edited by user Friday, 10 May 2024 8:15:25 PM(UTC)
| Reason: Not specified