What should timing advance be at idle?
between 5-20 degrees
Most engines have between 5-20 degrees of ignition advance at idle. This is referred to as initial timing.
How do you set the timing on a TBI 454?
The timing should be 0° TDC (454 engines – 4° BTDC). If a change is necessary, loosen the distributor hold-down clamp bolt at the base of the distributor. While observing the mark with the timing light, slightly rotate the distributor until the line indicates the correct timing.
How much timing advance is too much?
It’s generally acknowledged that peak cylinder pressure needs to occur at roughly 15-18 degrees After Top Dead Center in order to maximize leverage on the crankshaft. If the spark timing is initiated too early, the cylinder may experience detonation and potentially cause damage.
What should the timing be on a 454?
Big-block Chevy timing is pretty well standardized unless major modification have been done. The timing on stock 396, 402, 427 and 454 engines is 32-34 degrees total advance at 3500 rpm.
What should initial timing be on a 454?
The initial timing should be 4 degrees before top dead center (BTDC). If the mark is adjacent to a higher number BTDC, the distributor must be rotated clockwise to bring it down to 4 degrees. If the number is lower or after top dead center (ATDC), turn the distributor counterclockwise.
What should timing be on 454?
What are the symptoms of advanced timing?
Clues that the timing is too advanced would be hard cranking, the engine tries to kick back when cranking, rough idle can be caused by too much advance, and detonation is another sign of too much advance. It’s the timing of the firing of the spark plug relative to the position of the piston.
What should timing be set at on a 454?
The timing on stock 396, 402, 427 and 454 engines is 32-34 degrees total advance at 3500 rpm. This is for an engine with stock camshaft, heads, stroke, and a compression ratio of 10:1. The high-performance versions are slightly higher with a maximum advance of 38 degrees on premium fuel, if the camshaft warrants it.
What cars have a 454 engine?
The Chevy 454 engine is one of the most storied engines ever manufactured by an American car company. The Chevrolet 454 big block engine was introduced in 1970 and has went through various changes and revisions.
What are the torque specs on a 454 Chevy?
The engine delivers some 400 pounds-feet of torque at 5,250 rpm. The Chevy 454 features forged steel connecting rods, stamped steel rocker arms and a cast-iron water pump. The engine block is cast-iron with four-bolt main caps. It comes with an externally-balanced 14-inch automatic transmission flexplate.
How much hp from a 454?
With aftermarket components, it is possible to build engines designed on the 454 platform that are well in excess of 500 cubic inches. In staying with the standard bore/stroke combination of 4.25/4 inches, however, it is not uncommon to yield power outputs of greater than 650 horsepower from the 454 in race engine configurations.