Which spring for Forge MBC

[Geese1]

I'll be going for my tune in two weeks, and I was wondering which spring I should have installed in the Forge MBC for best performance.

Right now I'm boosting fine, peaking at about 20 psi with the softer spring that comes pre-installed in the controller, but since I'm sure the boost will be turned up when the car is tuned, should I swap in the stiffer one?

Or should I just bring the stiffer spring with me and let the tuner decide which is best to use?

Thanks for the help guys, and mods are in my profile for those wondering.

[05evo]

Originally Posted by Geese1

I'll be going for my tune in two weeks, and I was wondering which spring I should have installed in the Forge MBC for best performance.

Right now I'm boosting fine, peaking at about 20 psi with the softer spring that comes pre-installed in the controller, but since I'm sure the boost will be turned up when the car is tuned, should I swap in the stiffer one?

Or should I just bring the stiffer spring with me and let the tuner decide which is best to use?

Thanks for the help guys, and mods are in my profile for those wondering.

When I got my forge MBC, with a soft spring installed, it just wouldnt hold a boost over 19psi. Good thing I had harder spring in the set, replace it and now I have no problems going over 30! Just kidding
If you have harder spring I would recomended to install it.

[pure_evo]

Awesome! I was just thinking the same thing.

[Warrtalon]

You use whichever one works best. There is no direct answer for which one you should use, because it depends on the actual unit and your car as well as the WGA you use. Always start with the soft spring and work your way up. If you max out the MBC and don't have enough boost, then go to the stiff spring and start out by setting the MBC back to minimum.

[pure_evo]

Originally Posted by Warrtalon

You use whichever one works best. There is no direct answer for which one you should use, because it depends on the actual unit and your car as well as the WGA you use. Always start with the soft spring and work your way up. If you max out the MBC and don't have enough boost, then go to the stiff spring and start out by setting the MBC back to minimum.

Thanks for the information. I'll certainly keep this in mind when the parts start going on next month.

[Geese1]

Just for reference, I left the stock spring in and Dynoflash tuned it for 22 lbs. of boost without any issue.