View Full Version : Carburetta Jetting

04-28-2006, 07:42 AM
I have a Bertram 25 with twin 200 straight six chevies powering it. They are fitted up with a single 2 barrel 350 Holley carbie on each engine.
Can anyone tell me the ideal main jet sizes for the Holley's in this situation ?

04-28-2006, 09:04 AM
"No, but you can find out by making a speed run and plugging the plugs. If they are black--too rich. If they are white--too lean. If slightly colored (tan or brown) you're all set. Be sure the ignition timing is spot on, and kill the ignition soon as possible after throttling down.


04-30-2006, 02:54 AM
Thanks Jeff.
I was aware of how to do it that way but I was looking at trying to shortcut the process by getting as close as possible first before I started to play.
Thanks again.