Hello,
I have trying to adjust the timing and vacuum on my 62 HT with Holley 4100. I am struggling to find the correct settings and from what I'm reading I'm not alone. Some say use a timing light while others say tune by ear and other methods. Reading some success stories inspired me to tackle mine. For a brief time last month I had the engine running the best it ever had. But sadly, it has gone bad again and I cannot seem to duplicate it. All I had done different was lean out the carb and then put it back to where it was.(2 1/2 turns on the idle mixture screws trying to increase vacuum).
I had the rpm at 1dle (650) with 18hg of vacuum and the surging engine issue that had plagued me for years disappeared. The timing was around 10 BTDC and the smell of exhaust fumes that ran rich improved as well. When I pulled the plugs, they were all carbon fouled. I clean them all and reinstalled them. Can Anyone recommend any tips in fine tuning my engine/carb, (petronix 2/ igniter coil) that can help me fix a sick engine. Thanks.
I have trying to adjust the timing and vacuum on my 62 HT with Holley 4100. I am struggling to find the correct settings and from what I'm reading I'm not alone. Some say use a timing light while others say tune by ear and other methods. Reading some success stories inspired me to tackle mine. For a brief time last month I had the engine running the best it ever had. But sadly, it has gone bad again and I cannot seem to duplicate it. All I had done different was lean out the carb and then put it back to where it was.(2 1/2 turns on the idle mixture screws trying to increase vacuum).
I had the rpm at 1dle (650) with 18hg of vacuum and the surging engine issue that had plagued me for years disappeared. The timing was around 10 BTDC and the smell of exhaust fumes that ran rich improved as well. When I pulled the plugs, they were all carbon fouled. I clean them all and reinstalled them. Can Anyone recommend any tips in fine tuning my engine/carb, (petronix 2/ igniter coil) that can help me fix a sick engine. Thanks.
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