Carb question
Thread Starter
Instructor
Joined: Aug 2016
Posts: 206
Likes: 18
From: Reedsburg WI
Carb question
I have a 74 Vette with a 350, what size accelerator pump discharge nozzles should I roughly be using? Just want to avoid having to buy a lot of different sizes to get it right. I already upgraded to 31 and 35, but in first gear, it backfires from being lean even if I don't accelerate too hard. I have a Holley 650 CFM. Thanks for the help!
Brenden
Brenden
Le Mans Master
Joined: Aug 2010
Posts: 5,339
Likes: 546
From: Central Texas
Check the accelerator pump diaphragm. I've found that .028 to .031 has always worked best on my mild motors. You have something else going on.
Last edited by Street Rat; Aug 25, 2017 at 12:17 PM.
