Quote:
Originally Posted by Dr_Dirt
Components have to be matched. Tiny turbos feeding a larger front mount intercoolers could be a mismatch if the pressure drop offsets your cooling effect.
The larger intercooler requires more air to fill it, the tiny turbo spins harder to generate the same net effect. The air coming out of the turbo is now hotter due to the higher boost needed to compensate for the pressure drop from a larger intercooler.
You are fighting an issue of diminishing returns once you leave the turbos volumetric efficiency "sweet spot"
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Typically best aftermarket intercoolers are better than stock getting temps lower while being able to maintain pressure drop at stock level. Now if you have tiny turbos at the edge of their efficiency range and push even more boost, you generate higher temperatures and you need larger intercooler to get the temps down. If you have big turbo, it provides high flow easily without pushing and boosting it. The temps stay low and there is not much need to increase intercooling efficiency.
In case of 335, the boost is low to begin with, thus the OE intercooler manages ok. A better intercooler could manage even better, especially if increasing boost.