Post by
bradt »
https://forums.nicoclub.com/bradt-u39506.html
Tue Dec 09, 2008 9:00 am
When intercooler shopping, there are 2 main things you want to look for.
1) Surface Area : Will this effectively cool the charge and use the inlet area of my bumper optimally?
2) Pressure Drop: Does this core have too much room for what I am boosting?
Surface Area is how large the "face" of the core is. You do not need a core that is half hidden behind your bumper, because it is not having air run over it, therefore completely ineffective. Find a core that has at least 75-80% of its surface area exposed to the air channels.
Pressure drop is how much psi you lose by running it through a larger area. Let's say you have 3" diameter charge pipe. The boosted charge is funneling through this to the intercooler. Once it reaches the endtanks, all of a sudden there is a large opening with smaller channels for the air to flow through. By the time it reaches the opposite endtank, there has been a loss or pressure due to the large area. This is somewhat offset by the density change because of the cooling, however not enough to completely compensate.
Point is, shop smart when it comes to cores, and dont buy what you dont need.