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If the engine is stock, I'd set the initial timing at 12, make sure the timing mark starts to move when you rev the engine off idle, and watch it advance up to somewhere in the 30 - 35 degree range when it stops. Do this with the vacuum advance disconnected. Then with the timing set at 12 with the engine at idle, hook up the vacuum line to the distributor and see that the timing now shows somewhere in the high 20's to low 30's of timing.
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How do you set distubitor timing on Pontiac 455?
How do you set distubitor timing on pontiac 455?
Ignition timing for 1972 olds 455?
According to Chilton's 1971 455 is 12btdc, but there should be a decal under the hood or even on the engine itself that would list this info.
What is the ignition timing point gap and spark plug gap for a 1973 Pontiac 455 v8?
the gap on the distributor points is .016, the timing is advanced 4 degrees and the spark plug gap is .030
What is the timing setting for a Pontiac H.O 455 engine?
Should be 12 degrees before top dead center
What is the timing setting for a Pontiac H.O 455 engine.?
Should be 12 degrees before top dead center
Will a 1976 Pontiac 455 cc engine bend valves if the timing chain breaks?
Did a lot of timing chain jobs on the Pontiacs back in the day, don't remember any of them bending valves.
Is Pontiac 455 heads exchangeable with Oldsmobile 455?
No, they are completely different.
Is a Oldsmobile 455 the same as a Pontiac?
No, they are not the same engine. The Oldsmobile 455 had a bore and stroke of: 4.126 X 4.25 The Pontiac 455 had a bore and stroke of: 4.152 X 4.21
Will Pontiac 455 bolt in 1977 grand prix?
Sure it will. Pontiac used the same block for all of it's 326 to 455 engines.
What is the firing order for a 76 Pontiac trans am 455 engine?
Answer Anonymously What is the diagram and firing order for a 76 Pontiac trans am 455 engine?
What is the spark plug gap for a 455 Pontiac?
That depends on what type of distributor/ignition you are running. Point style, good rule of thumb is .035. HEI is usually .045.
Spark plug gap electronic Pontiac 455?
My 73 Bonneville has points type ignition. The later years had electronic ignition distributors, which had .045 or more gap. If you're engine is points type, the gap is .035.
