Originally Posted by Torquemonster440
Originally Posted by GTX MATT
Originally Posted by Torquemonster440
Originally Posted by GTX MATT
Which 850 Annular carb is it? 9380?


Yes, it's the 9380. And yeah I did follow up on Holley's website.. looks like it should of had 78's all the way around when new.


They came with 78s, and 78s are RICH in my experience. I'm surprised your plugs look lean, but the air bleeds may have been modified.


Supposedly the carb was new.. "never installed" when I bought it, but obviously someone fooled with it at some point.. because it had 82's on the primary side when I brought it home.


you should put the carb to baseline, it probably needs to go down on the prim jets. once you get the miss sorted maybe you can play with removing the secondary side power valve and upping the jets 6-8 steps...

also, i've seen pics of those carbs new or NOS without air bleeds in some positions, you should check that.