Play it safe then and just pull 1* per lb. It should be way more than enough.
Bad idea if you have a D-series and want any power.
-1* per lb = no power = safe
lol
Uh, no. Safe is not a bad idea, a bad idea is a bad idea. I meant it a complete other way.
Here, pictoral proof. Stock D16Z6 final timing is 28 degrees.
305 whp at 12 psi mutant D16Z6, probably running ~9 degrees timing. That's 1.6 deg/psi.
Above average 240 whp @ 10 psi Z6 with ram horn, etc. 12-12.5 degrees timing. That's 1.55 deg/psi
Fresh D16Y8 with an Edelbrock kit, 8-9 psi IIRC. It might have been 10 psi? It made 215 whp, nothing special, I remember expecting more. Let's call it 10 psi, 14.5 degrees final timing. That makes 1.35 deg/psi.
D16Z6 Vitara motor, 7.5:1 CR, DSM T25. The dictionary definition of friendly and laughs at detonation. Spikes to 20+, tapers to 12-14 psi because internal gates are for Volkswagens. 195 whp 210 wtq tuned last year, set FTOD at the auto-x last month. Call it 13 degrees final timing, that makes 1.1-1.25 deg/psi retard however you want to slice it.