2.5" vs. 2.75" vs. 3" Cold air! Advice needed! (Yes, I know its been covered)
 

First of all, I know this has been covered but I want CURRENT advice and recommendations.

So i'm looking to get a cold air for my dc2 made. Plan is to do a mild all motor build. Currently have a powerchamber intake. What do you guys recommend as far as size? I know a lot of factors play into the size so please explain what size is good for my set up.


Mod List as follows:

- B18c1 "gsr" motor
- Skunk2 Pro Series Intake Mani
- 70mm Skunk2 Alpha TB
- 2.25" Greddy 4-2-1 Header
- 2.5" mid-pipe
- 2.5" Spoon n1

Upcoming:

- Supertech Full Valvetrain
- Skunk2 Tuner 2 Cams
- AEM Fuel Rail
- AEM FPR
- 310 or 370 Injectors
- Skunk2 Alpha Header
- Portmatch Mani to TB


Let me know what you recommend. Thanks!

Re: 2.5" vs. 2.75" vs. 3" Cold air! Advice needed! (Yes, I know its been covered)
 

Iit will never be covered to each engine his own intake tube setup, dyno test!

Re: 2.5" vs. 2.75" vs. 3" Cold air! Advice needed! (Yes, I know its been covered)
 

3" pipe that is 18-24" in length seems to be a good overall setup to run. On 2L+ 3.5" seems to respond better. Get a BPi stack and filter for it and call it a day. Unless its a race motor where every .01 whp must be extracted keep it simple and go with what works.

Re: 2.5" vs. 2.75" vs. 3" Cold air! Advice needed! (Yes, I know its been covered)
 

3" with a velocity stack

Re: 2.5" vs. 2.75" vs. 3" Cold air! Advice needed! (Yes, I know its been covered)
 

its been covered, research and you will find the correct answer. Testing is the best way period.