Thread: Vacuum signal
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Old 08-06-2017, 07:20 PM   #97
Bored&Stroked
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Join Date: Jan 2011
Location: Central Ohio
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Default Re: Vacuum signal

I think your primaries are fine - in that you were in the 12 to 13.5 range. The only part that I don't like is that when you were under full throttle, that you were are 14.4 with boost (did you stay in it a bit to see if that held? Were you in a higher gear - 4th or 5th?). That is a bit too lean in my mind - even for a NA car.

What did the vacuum do under full throttle? Were you low enough to open the power valves? If so, then I would richer up the secondaries a bit - to get down to no more that 13.5 under boost. If the power valves aren't opening, then you'd go UP in the vacuum number so they open sooner . . . if they are opening, then you'd probably want to change the secondary jets one number and then see where the AFR goes too. Good work on everybody's part!
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