16 degrees btdc.
Well . . . it really depends how large your RV is. ----
250+ hp
9-13psi
454 cubic inch Chevy big block V8. aka 7.4L
depends on the condition and size...
My RV Chevy engine V8 454 has 43000 miles , til now inewer had a problem, my last trip was a horror, after 50miles the engine begin to cought and misfiring on the muffler, and it was not running round
the RV is running bad with spark plugs black
Correction: The Chevy 454 V8 is a 7.4 liter -- not 4.6 as was originally typed.
An RV.
Left side under the hood, close to the steering column
In a jam without a timing light or a vacuum gauge for reference, I would advance the timing a little at a time and test drive the vehicle between adjustments until I heard the engine ping under load, then retard the timing just to the point the pinging stops.