How big of Intercooler piping?

[Forced Fed]

The engine is a 750cc Weber Parallel Twin Four-Stroke and uses natural aspiration standard, and it’s rated at 80 hp. However, get the turbo version that adds a small K03 turbo that spins up to 200,000 rpm and watch it crank up to 135 hp. Get the Polaris 2007 reflash and you are at 150 hp.

Now my goal is to make 170-210 hp out of this engine, I've heard they can make 250+ hp.

Here are the mods I plan on using:

15.5" x 7.5" x 4" FMIC
Ported Garrett GT2854R Turbo
Custum Tubular Header
3.5" Aluminium Intake with AMSOIL Air Filter
Polished Ebay Oil Catch Can
Some sort of exhaust once everything else is in place

Now I guess how big of Intercooler piping should I go with, I was thinking 2"?

[Kracka]

2" sounds about right.

[twack]

wouldnt 1.75 be a little more suited for the application

[Kracka]

wouldnt 1.75 be a little more suited for the application
Besides all of us just guessing, have a more technical reason?

[Forced Fed]

The reason I would like to use 2" piping is because the intercooler I intend on using is an upgrade for a Toyota MR2. It just happens to be about the same size as stock intercooler on the FST only a lot thicker.

It also has 2" inlet / outlets on the end tanks and even has tabs in the same spot for mounting the intercooler and retaining the stock fan on the back of the intercooler for cool down.

[Kracka]

The reason I would like to use 2" piping is because the intercooler I intend on using is an upgrade for a Toyota MR2. It just happens to be about the same size as stock intercooler on the FST only a lot thicker.

It also has 2" inlet / outlets on the end tanks and even has tabs in the same spot for mounting the intercooler and retaining the stock fan on the back of the intercooler for cool down.
Sounds like you should just go with 2" piping then.

[A//// Guy]

2" is pretty big for such a small motor but it wont "not" work.

[asshanson]

1mm piping

OD? haha.

Yea sounds like 2" would be easiest. Turbo have 2" compressor outlet?

[Forced Fed]

OD? haha.

Yea sounds like 2" would be easiest. Turbo have 2" compressor outlet?

Not sure off the top of my head, I'm assuming smaller?

I just know that the compressor outlet is pointing where I need it to be (towards the FMIC) with the type of header I want made.

Actually am thinking of going with the GT2854R instead of the GT2554R now but who knows what I can find a good deal on at the time.

[Super Bleeder!!]

Actually am thinking of going with the GT2854R instead of the GT2554R now but who knows what I can find a good deal on at the time.

those are both way oversized for your application. I'm sure they make something smaller.