singang

Anyone agrees with that:

Typical A/F ratios:

high 14's up to "0 PSI" AKA atmospheric pressure (1 BAR)
mid 12's up to 6 PSI (1.4 - 1.5 BAR)
mid 11's up to 14.5 PSI (2 BAR) and above.

Typical timing advances:

30 to 35 deg advance to 90kpa (0.9 BAR)
20 odd up to 120kpa (1.2 BAR, 3 PSI)
as low as 10 to 17 total advance up to 200kpa (2 BAR, 14.7 PSI)

Or is that just bull**** for our Scooby?

Any suggestions? Greets SIN

XNWRX

Can be considered as correct for A/F ratio. But ignition timming is much more complicate and is relative to RPM. And both must be adjusted together.

singang

I believed that too, my PFC IGN Timing values are far away from those. However AFR seems to be about right. I tried to reach 11.5 from 0 PSI but that seems to slow down the spool up time. Anyone ells had similar experiences about that?

singang

Anyone got similar experience with the AFR Value set to 11.5 through the whole range?? Did it slow down spool up? What are your suggestions?

SiHethers

Sin

If its any help, my ignition timing goes from 15 degrees at 3000rpm to 22 at 6000rpm with 1.4bar MRP (2.4bar MAP) held throughout, with AFR of 11.2-11.4:1 roughly.

Spool-up is in the 12-13:1 AFR range.

Simon