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ratmower
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 ?

fastjeff
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.

Jeff"

ratmower
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.
Peter