Where should my timing advance be?
Where should my timing advance be?
Most naturally aspirated engines like a total timing of 34 to 36 degrees BTDC, (Before Top Dead Center) AKA “Advance”. Nitrous and supercharged engines usually run less than that, unless you plan on blowing the heads off the engine or blowing holes through your pistons.
What happens when the automatic timing advance unit fails?
When the automatic timing advance unit fails it can cause a variety of problems that can disturb the performance of the engine. Usually, when there is an issue with the automatic timing advance unit, the vehicle will display a few symptoms that can alert the driver of a potential problem that should be serviced.
Can a bad timing advance unit cause black smoke?
For this reason, a problem with the timing advance unit can quickly cause problems that can upset the the combustion process. Usually, the combustion will be incomplete, and the excessive fuel will be burned inside of the vehicle’s exhaust producing black smoke.
Is the 351W the same firing order as the 302?
The 351W has the same firing order as the H.O. 302. The firing order of lesser 302’s is different. Ok. I just hooked the timing light up to the #1 plug and adjusted it by ear, watching how far it movied. the line moved (the top dead center line) moved about 1/2 inch towards the passinger’s side.
What happens when you advance the timing on a car?
The idle will certainly speed up if you advance the timing (entirely normal) but the risk you run by eyeballing and guesstimating the timing is that if you have too much advance there is a strong possibility of burning some pistons and possibly the cylinder walls out during a highway run.
What should the timing mark be on a Ford 351?
When you goose the throttle, timing mark movement should roll with throttle movement. You want spark advance to roll quickly with RPM increase and throttle movement. If you don’t have a vacuum advance, spark advance should increase in linear fashion with RPM—more slowly.
How does the vacuum advance work on a Ford 351?
The vacuum advance is operated off throttled vacuum advancing the spark when you step on the gas. As revs increase, vacuum advance smoothly hands off to the centrifugal advance, though both work continuously.
Do you need a timing light for a vacuum advance?
The second way to test the vacuum advance does not require a pickup timing light. With the engine off, remove the distributor cap and use a vacuum hand pump to operate the advance mechanism. The diaphragm moves a rod that turns a sliding plate at the base of the distributor, which can be seen with the naked eye.
How many CFM does a Ford 351C have?
The 351C 4V motors, and even the smaller 1969 & 1970 Boss 302, offered head flow unmatched by any (regular) production small block Ford, Chevy, or Dodge heads of the period. To put this flow into perspective, a 1987-95 5.0L Ford (E7TE) head flowed 155-160 cfm, and a Chevy Fuelie head might flow 210 cfm.
