0
What else can I help you with?
Do you need to unhook your vacuum advance when using the timing light?
YES! Any time you adjust the timing you should disconnect the vacuum advance.
1970 Chevelle Malibu with a 350ci engine What should the timing be without the vacuum advance then with vacuum advance and at what RPMs?
800rpm manual transmission, o degrees advance 1200rpm automatic transmission 4 degrees advance
How do you check a vacuum advance with a timing light?
Disconnect and plug the vacuum line and time the engine. Reconnet the vaccum and recheck the timing which should be advanced.
1978 350 with HEI ignition what should the timing be set at and at what RPM should the engine be running when you set it and does the vacuum advance need to be disconected?
SBC timing should be set at about 6-8 degrees advance with the vacuum disconnected at idle, about 600-800 rpm
What is the advance on chevy 350 timing?
The vacuum canister can advance 24 degrees beyond initial timing.
What is a vacuum advance mechanism?
A vacuum advance mechanism is a component in a distributor that uses engine vacuum to advance the timing of the ignition system. This helps improve fuel efficiency and engine performance by adjusting ignition timing based on engine load. By advancing or retarding the ignition timing, the vacuum advance mechanism optimizes combustion for varying driving conditions.
Does the vacuum advance get constant vacuum or not?
Manifold vacuum usually. There may be some instances where someone reworked a distributor to arrive at a specific timing curve under load using ported vacuum with the vacuum advance, but this would be rare as most people would re-curve their distributor by changing advance weights and springs and would limit the advance built into a distributor so they could use more initial timing without having the total timing go over 36-40 degrees when the engine is revved up and all advance is in.
1970 Chevelle SS with a 454 engine what should the timing be without the vacuum advance then with the vacuum advance and at what RPMs?
Which 454? The LS5 and LS6 are two VERY different engines even though they are both 454's. Timing specs are different as well. 8 degrees before TDC at idle will work for either, but may not be optimal.
Can you run lean distributor without vacuum?
Yes, you can run a lean distributor without vacuum advance, but it may lead to suboptimal performance. The vacuum advance helps adjust ignition timing based on engine load, improving efficiency and reducing emissions. Without it, the engine may experience timing that's too advanced or too retarded under varying conditions, resulting in rough running, poor fuel economy, and increased engine heat. It's advisable to tune the distributor carefully if operating without vacuum advance for better performance.
What should the timing belt read for a 1966 Chevrolet?
There were not any timing belts in 1966. The timing should be set at 4 degrees before top dead center. With the base timing, the centrifical and vacuum advance all together should be 35 degrees.
When setting the timing on a Ford Festiva should you diconnect and block both the top and bottom vacuum tubes on the distributor?
just the top one that is the vacum advance, timing should be 2 degrees BTDC with vacum advance line removed and blocke
How vacuum advance works?
at cruising speeds you will be in a high vacuum situation that advances the timing for better economy.
