Setting Timing With Vacuum Gauge Sbc at Joseph Altamirano blog

Setting Timing With Vacuum Gauge Sbc. That should put you in. Use vacuum gauge to set up idle screws on the carburetor, not timing. You want to get the highest possible. Bring it back down to idle, check the timing, write this down, this is. We set timing by cranking it up until spark knock occurs, then backing off until tolerable. I like to set it between 36* and 38*, depending on the engine build. I set my timing tonight using the vacuum method, find the highest vacuum reading then back off 2 units and tighten dizzy. The problem with setting the timing with a vacuum gauge is that you are only finding the optimum setting at idle. To find out what your mechanical advance is, remove the vacuum line from the distributor, plug it, rev the engine, and get a reading off the timing marks on the harmonic damper with the timing light. Time it with a vacuum gauge, run it up to roughly 2500 rpm and turn your distributor until you reach your highest vacuum reading then lock it down. Set the timing with the vacuum advance hooked up so you can do vacuum and mechanical advances at the same time. The higher vacuum reading should put you in a favorable setting. Keep your vacuum gauge for adjusting idle mix.

Set the timing with the vacuum advance hooked up so you can do vacuum and mechanical advances at the same time. The higher vacuum reading should put you in a favorable setting. We set timing by cranking it up until spark knock occurs, then backing off until tolerable. To find out what your mechanical advance is, remove the vacuum line from the distributor, plug it, rev the engine, and get a reading off the timing marks on the harmonic damper with the timing light. Time it with a vacuum gauge, run it up to roughly 2500 rpm and turn your distributor until you reach your highest vacuum reading then lock it down. I set my timing tonight using the vacuum method, find the highest vacuum reading then back off 2 units and tighten dizzy. Bring it back down to idle, check the timing, write this down, this is. That should put you in. Use vacuum gauge to set up idle screws on the carburetor, not timing. You want to get the highest possible.

Vac Visual Quick Guide to Vacuum Gauge Readings OnAllCylinders

Setting Timing With Vacuum Gauge Sbc To find out what your mechanical advance is, remove the vacuum line from the distributor, plug it, rev the engine, and get a reading off the timing marks on the harmonic damper with the timing light. I like to set it between 36* and 38*, depending on the engine build. Keep your vacuum gauge for adjusting idle mix. Time it with a vacuum gauge, run it up to roughly 2500 rpm and turn your distributor until you reach your highest vacuum reading then lock it down. Use vacuum gauge to set up idle screws on the carburetor, not timing. The higher vacuum reading should put you in a favorable setting. The problem with setting the timing with a vacuum gauge is that you are only finding the optimum setting at idle. I set my timing tonight using the vacuum method, find the highest vacuum reading then back off 2 units and tighten dizzy. To find out what your mechanical advance is, remove the vacuum line from the distributor, plug it, rev the engine, and get a reading off the timing marks on the harmonic damper with the timing light. You want to get the highest possible. Bring it back down to idle, check the timing, write this down, this is. We set timing by cranking it up until spark knock occurs, then backing off until tolerable. Set the timing with the vacuum advance hooked up so you can do vacuum and mechanical advances at the same time. That should put you in.