ca18det intercooler piping size ?

[Chinamandrift]

i was going to order some piping to do my intercooler .......and i noticed theres a veriety of sizes ....2 1/4inch....2 1/2inch.....3inch ...2inch..........what size is enough for the ca18det Vmount set up .........would it matter ?? ....i would assume the bigger the piping the more boost lag .........what about intercooler in-let and out-let???........

[Indecisive]

The general idea behind intercooler piping is this.

The hot pipe should stay the size of the compressor outlet until it reaches the intercooler. Then it should match that(as close to the intercooler as possible)

Then the cold pipe should immediately transition from the intercooler outlet size, into the size of the throttlebody.

basically, it's all about velocities.

By keeping the hot pipe small, there is very little velocity loss. Once it goes into the intercooler, it needs to fill up that space, and then come back again into a small space(the intercooler outlet). So when it leaves, it's better to have a larger cold pipe so the air isn't forced into too small a pipe, creating lots of resistance.

That's the basic principle behind it anyway.

[Chinamandrift]

so keep the hot pipe as small as the outlet on the turbo ............and keep the cold pipe larger into the size of the throttle body .....

now most intercoooler out there ...inlet and outlets are usually the same size ...........would i benefit anything with a custom intercooler with the inlet as big as my turbo outlet......and the outlet on the intercooler to be larger then the inlet of the intercooler........??? does this make sense ...i had to read it a couple times haha ..

[float_6969]

No. That's why they make silicone reducers.