will small charge pipes help slow the spool up time of the turbo;the reason im asking is i have a IHI ;and i guess they spool up fast and top out to soon

 

no, big ones will.

but not much, it cant be raised much.

 

Larger charge pipes = better flow, slower spool time

Smaller charge pipes = less flow, slower spool time

The difference between a 2 and 2.5 inch charge pipe (most common size) in spool time is probably so small its hard to tell the difference in the two.

The cutting out too soon is the turbo reaching its max efficiency and not being able to flow the air the motor requires to make more power. A larger turbo or nitrous :Pwill slove this problem.

 

The difference is that with larger pipes, you have more VOLUME you have to pressurize when your turbo starts to boost. You can do some calcs to the ammount of air it takes to fill the charge system and compare. use the IDEAL gas law if you feel like being a nerd. But bottom line is its very small differnce between anything up to 3" or so.

 

Yeah, the volume of your charge pipes, no matter if they are 2" or 3" are so insignificant compared to the amount of air the turbo moves that they are probably emptying 10 times a second if not more. You'll never notice the difference, not even if you tried.

-Matt