Im the kit i bought i have 2.25" intercooler piping. Is there such a gain from 2.25 to 2.5" that i should i upgrade?

Also, im assuming the upgrade wont be worth it if my intercooler has 2.25 endtanks. Some one help me out. im new to the turbo game

 

bump

 

you will gain absolutely nothing.

You may lose some mid-end spool up horsepower also.

 

Stick to the 2.25" charge pipes that came with the kit, keeping it simple is best. Changing to 2.5" charge piping will not gain you anything unless the flow has increased quite aalot (upgrade to a much larger turbo).
If you were set on changing the charge pipe sizes the only changes I would make is on the Throttle Body pipe. You could transition from 2.25" to 2.5" at the throttle body opening. I'd run it as is though.

 

Ok...thats all i needed to know, thanks alot guys

 

From what i've learned in thermodynamics class:

By increasing the diameter of your pipe, fluid velocity decreases quite substantially. When you go from 2.25" pipe which has a x-sectional area of 3.97 sq-in, to a 2.5" diameter pipe with a x-sectional area of 4.91 sq-in, that's a 24% increase in area and that's also a 24% decrease in fluid velocity. Which means that air stays in your intercooler for 24% longer, and because the pipes should be nicely insulated, heat flow into them should be neglegible.

But also, since fluid velocity decreases 24%, you may also lose power from flow losses.

So my theory would be that because the air is cooled for 24% longer, it should be safer, not necessarily better for performance. But that's my opinion, what really happens is left for those who've tried it to find out.