what are the factory timing specs for a 1977 chevy 454
9 to 13 LBS ( PSI ) is factory specs.
what is the ignition timing for a 1988 Chevy 454 engine
My Motorhome still has the tune-up specs. on the 454 air cleaner housing. It says to undo the vac. at the distribator and plug it. Make sure the engine is runing at 700 RPMs and set the timing at 4BTC.
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.
timing for the 454 engine is 10 degree's at TDC at 700 rpm in neutral or park
the 7.4 vortec 454 has 290 horsepower and 410 ft lb or torque
Yes I have a 1990 with a 454 from the factory...
4 to 8 degrees BTDC/ before top dead center. light duty 454 is 4 degrees BTDC Heavy duty 454 is 8 degrees BTDC.
The timing on a Chevrolet 454 cubic inch engine is either 4 or 6 degrees before top dead center. Minor variations will produce different performance results.
The 454 LS7 crate engine sold by GM is rated at 500 hp.
The life expectancy of a timing chain on a 1999 454 Vortec engine is 5 to 10 years. The exact time depends on how often the vehicle is driven.
The base ignition timing for a 1974 Chevy 454 engine is between 8 and 12 degrees below top dead center. A timing light is needed to accurate set ignition timing.