I've just got a second lambda sensor for my LM-1 wideband so that I can tweek the MK's pinto (not yet SVA'd) to ensure passable emmisions but also to check safety when booting it.

What sort of full throttle AFR should a 2.0 pinto on 40's be tuned to for safety and power?

I'm used to tuning a CVH turbo to around 11.8-12.0 AFR but I'm assuming a N.A motor wants to be running a bit leaner than that? 12.6 perhaps?

[Edited on 11/3/09 by FASTdan]

I'll be aiming for 12.5-13 [full throttle] when I do mine tonight [2.0 Zetec & bike carbs]

[Edited on 11/3/09 by whitestu]