I do not think his guage is reading correct at idle or boost. Most engines will not produce vacuum reading that high at idle. I agree Iregardless his carb tune is off and needs to get under control. I second that,, the A/F ratios @ semi throttle accelerating, hard on the throttle & under boost are all off,,, he needs to be careful before the engine goes KABOOM!
I wonder what his intake air temps are running 10 psi & no intercooler? Snow, You reaaly need to do tuning , one step at a time. This includes timing and carb. I would think he knows this by now. :/
My 292 has O2 readings like this. idles at 12.75, cruises at 12.5 and full boost is 11.25 or so. Timing 23-25 at idle (total) , 48 cruise, 27-28 under boost.
Tlowe, just curious how much total timing you have run @ cruise & when you have gone over 48*,,, what happens, does the engine start to buck & not like it , or ?
