Quote:
Originally Posted by ksa8907
The larger diameter would slow down the air flow and could cause a loss in power.
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Going the other direction... would decreasing the diameter speed up the air flow increasing power? (within reason of course, not downsizing to 1/2" or something)
Quote:
Originally Posted by 67-ls1
I agree. The MAF sensor is calibrated for a certain size intake diameter. If you change the diameter (to much) you will change the velocity of the air. The O2 sensors should keep the A/F ratio correct but it would do it by pulling fuel back because there’s more air than the MAF told the ECM.
I buddy just experienced this is an engine swap in a Jeep where he upsized from 3” to 4” with the stock MAF sensor.
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What is too much? Is 1/4" within limits? Say 2-3/4" to 3" diameter pipe?
How does the Jeep run with the 1" larger pipe? Does it have more power, more "zip", better throttle response? Or just the opposite?