Is there anyone who makes 3 inch intercooler piping strictly for our car? Like a kit or do i have to make it myself?

 

You have to make it yourself. And the next question is why? 3inch is pretty big; It creates a lot of volume to fill and you will lose pressure. Most run 2.5 or 2.

 

Will also be harder to run bigger pipe than smaller, 3" seems like overkill.

 

Yea it's a pita to run 3" piping for anything let alone turbo piping with hardly any underhood room. But, think about the flow potential if you could spool a big enough turbo, that'd be a rocket once it hit boost.

 

You not see my engine setup?
3 inch Baby..go big or go home.
Why upgrade later..heh..do it now!

 

What kind of boost are you hitting? Must be a large turbo.

 

I had a BNR stage 3 that would hit 15psi.
I just installed a T04S...and a couple other goodies..It needs a tuning.(ran but blew up a coil when changing ignition settings on the Haltech..smoked a brand new coil.poof!)
I am not finished yet in the engine bay so don't say that my brake booster line is disconnected..lol!

 

I used 2". Turbo.spools up quick, no boost creep, and its also cheaper. Got a kit on ebay for $80 shipped. Works great!

 

Hello, I am building a 13brew with a holset hx52, I have a 4" intercooler and 82mm DBW, what piping size would be better to use?, I am looking for 2.75 hot side and 2.75" to 3.25" in throttle body to cold side is a good choice, ? Or is better 3" to 3.25" cold side I will work low boost 14psi and high 25psi

 

At 14 psi, even 2" would be fine (and would get you better spool since there's less volume to fill as the turbo speeds up, and less air to dump through the BOV when the throttle closes on shifts - better responsiveness. At 25 psi, assuming that the air flow increases commensurately (which it doesn't since greater back-pressure means that gains aren't 1:1 with boost pressure), then 2.5" piping will give a negligible drop in pressure over its length. Stepping up to 3" isn't necessary, and makes more work packaging, getting tight bends, etc.

What size is your exhaust? 3"? 4"? Remember, the exhaust gas coming out of the back of the turbo is much hotter (~1000C vs ~150C) and at lower pressure (just over atmospheric vs 2-3X atmospheric pressure), which makes it much, much less dense than the compressed air from the turbo compressor. Since the velocity of the gas through the pipe is (to the first order) what drives pressure losses, the same mass flow of gas in the exhaust at a much lower density has to move much faster and therefore accrues considerably more losses than that mass flow in the intake piping after the compressor. Using those numbers before & the ideal gas law (PV = nRT, or P1*V1 / T1 = P2*V2 / T2 = nR for the same gas flow at conditions 1 in the intake and 2 in the exhaust, and the specific concentrations of O2, H2O, CO2 & N2 don't change the molar mass and thus n much), the volume of gas that must be moved per second is ~6X greater at 14 psi (~2 atmospheres) than in the intake for the same mass flow. 4" ID tubing is only 2.56 times the cross-sectional area of 2.5" pipe, and chances are the length of IC piping is less than the length of exhaust piping, so if you think a 4" exhaust is sufficient, than a 2.5" intake is going to be 6/2.56 times as sufficient (at least on first-order principles, neglecting the added exhaust mass of the fuel (which is 8-9% of the airflow at an AFR of 11-12 under boost), air viscosity vs temperature, surface textures etc.

Basically, 2.5 will be fine for the tubing. The intercooler itself will likely be a bigger pressure loss even after accounting for the drop in temperature across it.