| Re: Car is driving me crazy: Engine tuning troubles (with a carb) |
Subject: Re: Car is driving me crazy: Engine tuning troubles (with a carb) by lltrevino on 2009/12/2 3:43:20 with 15 inches of vacuum would not a 7.5 powervalve be better? my rule of thumb was, 1/2 of idle vacuum. Also, does your distributor have vacuum advance? I assume, can you adjust your vacuum advance, by inserting a 3/32 hex wrench in the vacuum tube fitting? Its been about 10 years till 2 weeks ago since I tuned a carb, however I always did the power tune method. I use to advance it till ping than retard it. I use to start with dizzy weights, and finished with the vacuum advance. Just went through this pain in my plow truck, 10-1 355 sbc way over cammed 292 comp cam. took 2 weeks after work to get it right, included 3 carbs, and finally rebuilding the originally carb. I feel your pain. I did find 10* initial was the sweet spot also. |
