Bigger I/C piping? better?

[4g63telantra]

I was running a stock T.body with 2.5" I/C piping on my car. I upgraded to a 3' T.body and a Magnus intake manifold. Just wanted to know if I should now run a 3" IC piping.


Will this improve power or even spool time?

 

[WeaselHack]

3" may be overkill but whatever floats your boat. 2.5" should be more than enough. If you go with metal pipes it will increase throttle responce and there will be less pressure drop like that associeated with expanding rubber hoses under boost. And NO, it will not make your turbo spool any faster.

 

[No_Skillz]

Bigger pipes mean more flow but it also means more volume for your turbo to fill before it really starts to feed the motor.

For a smaller turbo, smaller pipes are better. If the pipes are too large, you will be adding some lag since it will take time for the small turbo to fill that volume.

For a bigger turbo, lag from pipe size becomes less of an issue due to the larger amount of air it can push. In this scenario, you would want larger pipes so you can get more air to make more power.

 

[4g63telantra]

Well Ill be adding a GT40 to my set-up. Its a HUGE turbo but guess ill stick to the 2.5" piping.

 

[syclone]

Lots and lots of people have gone hella fast on 2.5" pipe, I dont think any larger would be nessassary.
not to mention the fitment issues, it takes more room to run 3 inch.

 

[DSMunknown]

hella fast

Who are you, Eric Cartman?

I dont think any larger would be nessassary. not to mention the fitment issues, it takes more room to run 3 inch.

I agree. Unless you're close to the 1000whp mark, three inch intercooler piping is over-kill.

 

[nightspeed87]

id say 450 whp + should be enough to go 3in intake pipes; ( excuse a little low end lag ) But hell a drag car doesnt consern itself with low end power anyways, so spool up is only for street cars if it means sacrificing top end power. If you need an exhaust at a 3in size to efficently run with that much hp. ( Ive read you actually require a 3in and up exhaust for anything over 450whp ) and I look at it this way, you cant get in the engine what you cant get out. Perhaps its different on an n/a car without boost forcing thru the engine, but either way the system is a whole. Basically im saying that I think once you reach the point to where the 3in exhaust was really required then the 3in intake would be also.