My Prestolite dizzy decided to die so I have ordered a Petronix D232800. Now I need some help choosing a timing curve for my mildly built 460.
As the motor sets it is a D1VE block with stock dished pistons and ported C8VE heads running MEI 1.8 roller rockers and Ferrea CP Valves (2.19/1.75). It runs Stealth 8012 intake, a marinized Holley 80531 (850CFM with vac secondaries), and a Comp Cams 34-251-4 (dur: 236/244 @ .050, .565/.560 lift [.598/.593 with 1.8 rockers], and 110* duration). Exhaust is unfortunately still exiting through the old stock logs. This all powers a Sidewinder 18SS with a Berkeley JC pump and an aluminum “A” impeller and Hyd Place diverter.
The Petronix D232800 has the ability to advance timing a total of 24* with advance limiters of 12*, 16*, and 20*. It can bring advance to full extent by 2000, 3500, or 5000 RPM.
I’m leaning towards a base of 10*BTDC with no advance limiter and aiming for full advance of 34* at 3500 RPM. Does this seem to be a good choice or would I be better off limiting total advance to 30*?
EDIT: Well after more reading on other BBF forums I have muddied my brain even farther. Would I be better off running 14-18* initial timing (the motor does like the more advanced base in past testing) and limiting my total to 38* max?
Thanks,
Bones
http://images25.fotki.com/v948/photo...SCN2647-vi.jpg (http://public.fotki.com/Bones/misc/r.../dscn2647.html) http://images29.fotki.com/v1015/phot...SCN3289-vi.jpg (http://public.fotki.com/Bones/misc/t.../dscn3289.html)