what are the factory timing specs for a 1977 chevy 454
The typical timing for a 1985 Chevy 454 is 8 degrees before top dead center. The vacuum line removed from the distributor and plugged. The engine warm and idling at 700 rpm.
4 to 8 degrees BTDC/ before top dead center. light duty 454 is 4 degrees BTDC Heavy duty 454 is 8 degrees BTDC.
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.
6 degrees btdc
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.
the answer is 10 degrees and the firing order is142536
what is the ignition timing for a 1988 Chevy 454 engine
9 to 13 LBS ( PSI ) is factory specs.
timing for the 454 engine is 10 degree's at TDC at 700 rpm in neutral or park
A timing CHAIN
The firing order for a 454 is 18436572.