Quote:
Originally posted by BAdAzZV8
When you remove a restriction in the MAS(combs) you are letting more air in, but not all of it is being metered. That is why it leans out your car, b/c more air is getting in and not being metered. That is why he can richen his AFC and get timing retard.
The vette guys gut their MAFs to run a little leaner b/c factory settings are a bit rich.
So multiades, he is correct when he says that you can richen the AFC when gutting the MAS. You see, not all the air is being metered, so there is no correction at the MAS as you stated, there is only the AFC correction.
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I understand that you can richen the AFC when gutting the MAS, and I understand WHY you can richen the AFC when gutting the MAS.
Let me phrase it differently for you: not metering all of the airflow coming into the engine is EXACTLY THE SAME AS applying a negative correction on an AFC.
That's really all that's going on here -- you use less negative correction at the AFC, because the MAS itself is already misrepresenting the amount of air moving through it. The AFC is designed and installed for the purpose of misrepresenting airflow, but it does it by modifying the signal directly, not by bypassing the metering element.
I'll draw a diagram later if need be.
-Chris Wood