where in Atlanta are you?

I used to live in midtown area. Went to Ga Tech and I miss Atlanta, a lot!!

 

This has been discussed before and no one was able to provide any real data showing any appreciable gains.

I can see it both ways. On one hand you are shortening and straightening the pipe so it should improve response but, on the other you are increasing diameter rapidly which could cause turbulence and decrease velocity into the intercooler. So who knows.

 

I would love toknow the same thing. Could someone please explain Seems like just another way for us to spend our money foolishly

 

I am an engineer. The lower intercooler pipe decreases spool by reducing the friction associated with the oem pipe. By reducing the length or pipe, reducing the number of bends, and increasing the diameter of the pipe you effectively reduce the skin friction in the pipe, this in turn reduces the pressure drop across the pipe (from turbo of hot side of IC)

This makes the compressor of the turbo push air more easily and because THE COMPRESSOR AND TURBINE ARE CONNECTED a given unit of exhaust energy put into the turbine wheel can spin the compressor wheel more easily because of reduced friction on the compressor side.

voila, spool is decreased

if you would like some equations i can supply those too

 

The Lower Intercooler pipe is one mod you want to do asap. It frees up alot of flow in the system. The OEM LICP has mani bends and the piping is very small in diamter out of the turbo outlet. Nisei Engineering is the BEST LICP on the market. Has been tested many times and been proven.

 

Yea, I experienced about 10whp from the Nisei pipe myself. And posted logs but that wasnt good enough for the naysayers and eventually I decided I didnt need to convince the naysayers. The Nisei LICP works, not sure about other pipes as I dont have any first hand experience with them.

 

It would spool quicker... less restrictive bends and shorter piping = better spool.

 

Here's a picture to help illustrate what the guys above are saying:



By increasing the piping diameter earlier in the system, resistance is decreased and flow is improved. Flow is further improved by making that expansion prior to the tight radius bend required for the piping to clear the factory undertray. Such a tight bend is not ideal, but by using full 2.5" piping through the bend rather than expanding after, flow is maximized given the tight radius with which we have to work

Tom

 

I noticed a difference just from putting the LICP on and when I put the FMIC and UICP it was even better!!!!

 

yeah, I put down 350whp back when my Evo IX was bonestock, just by adding a LICP!!!!11!!!! and that's BEFORE the tune!!


No, seriously -- I have the Nisei LICP and didn't notice a damn thing -- no increased spool or power, despite the fact that I was already biased that I would... Still have the stock IC and UICP, and don't plan on changing

 

When I put my LICP in I felt like i had better throttle response

 

i did a speed source licp, necks down a lil which kinda sux(but i bought it on impulse) but i noticed the throttle response and spool to be much better, if u see a stock one compared to an aftermarket one, u will put it on immediately. imo its worth the 160 bucks