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I think you are both missing they key difference slightly.
Overboost, you are correct in that the intercooler that produces the lowest ait with make the most power.
Clap135, you are correct in that a lower pressure drop is optimal.
However, I think the issue is whether a lower ait or a lower pressure drop will benefit a faster 1/4 mile time.
Pros of a lower pressure drop and higher ait:
the turbo will need to produce less boost to achieve the manifold boost target.
The turbos will reach their boost target slightly quicker.
Cons:
The ait will be higher and thus produce less power.
Pros of a higher pressure drop and lower ait:
The engine will make more power from the increase in the density of oxygen molecules in the combustion chamber
Cons:
The turbos will have to work harder to achieve the boost target
The turbos will take slightly longer to reach the boost target
I think the question that must be answered is will the shorter time to boost target make for a faster 1/4 mile or will the gains be minuscule thus meaning that an increase in overall power would be most beneficial.
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