38 is from
Basic Startup and Adjustment and Ignition Tuning for Maximum Performance taken directly from the
Mopar Performance Small Block V-8 Electronic Ignition Kit instruction sheet
56 BTDC all in.
http://www.mopar1.us/engine2.htmlEngine Heads Timing Specification
A Production - Pre '89 (Iron) 35 BTDC
A Production - '89 & Newer (Iron) 32 BTDC
A W2 (Iron) 35 BTDC
A W5 (Alum.) 35 BTDC
B/RB Production (Iron) 38 BTDC
B/RB Stage I, II, III, IV, V (Iron or Alum) 38 BTDC
B/RB Indy (Alum) 35 BTDC
B/RB B1 (Alum) Under 475 cu. in. 37-39 BTDC
B/RB B1 (Alum) Over 475 cu. in., Under 15.0:1 Ratio 36-38 BTDC
B/RB B1 (Alum) Over 475 cu. in., Over 15.0:1 Ratio 34-36 BTDC
B/RB B1 TS 34 BTDC
Hemi All (Iron or Alum) 35 BTDC I can already tell you that there are issues with that list. Production A engines in the 80's are not all the same. The 318 went to swirl port closed chamber heads in mid 85. 360's didn't, they got a swirl head, but open chambered in 89. Then the Magnums came out and those heads bear little relationship to the earlier stuff. As is typical with MP, the info is poorly detailed. Being those guys were almost invariably straight line race only oriented they don't think of anything else and neglect to tell you that.
I assume that that info is a bit dated, and, only even then pertained to OEM engines converting from points to the 1972+ electonic module.
My interest is bone stock 1971 413-1 so the numbers are likely fine.
I don't track run it
This heretic swapped an LS3 with supercharger...4L80E auto 4 speed
https://www.facebook.com/grizzly.hansen/videos/471409475036115/?idorvanity=358395874142
