which one is better on a gsr

 

What exactly are you trying to achieve?

 

he wants vtec to kick in earlier and an overall increase in power/torque. hes planning on doing this after intake/header/exhaust

 

For I/H/E V-AFC is fine for now.

Shingo

 

PS you probably want your VTEC to kick in later

 

why is that? (im not too knowledgeable about vtec)

 

vtec motors have more power in higher rpms. plus hondata is the s*it. it has alot of stuff that you can tune yourcar with.

 

vafc is fine for now but if u have the money to spend..by all means go for the hondata =)

 

The method of tuning isn't really that important unless you actually take the car to a dyno.

 

There is no real need to change the VTEC x-over with stock cams. Unless you have or are planning on bigger cams like R cams or whatever then you are wasting your time and money. The x-over for the GSR cam is optimal. If you want to move your torque around, get cam gears with the cams. The gears can be adjusted on a dyno to move the torque curve lower or higher and so on.

Hondata is a really good tuning tool if you know how to use it. But if you are just going to play with x-over points than you REALLY don't need it. Hondata is good for highly modded cars or F/I cars. Again, a waste of $$$ for just I/H/E.

Modding your car is like a chess game, you need to plan out your moves. Ask yourself, do you really need it? Will I be using it to the fullest potential? If not, why get it? What type of power am I looking to get and what mods do I need to get there? ...etc. But most importantly, research your mods first. ie - If I plan to go turbo, why get a header?

Good luck!