I have seen some people talking about using Co2 with their boost controllers, and lowering the boost at launch. My setup has dual Tial 38mm gates. I want to run a higher psi spring in the gates, so I can still make a decent amount of boost (18psi or so) when the controller is inactive.

When at the track, the controller/Co2 will be on. I want to launch at 7-10psi and ramp it up to 25psi.

How does the controller take away boost from the spring setting on the WG? I am assuming I will need to hook up the regulated Co2 on both the bottom, and top (through the MSD solenoids).

Sorry for the newbie question. I am trying to get around the MSD's "Drag race only" setup. It has to see power from my brake light switch (stage), and T-brake release 12v before it goes active.

Any help would be greatly appreciated.

 

The CO2 is a high pressure so if you apply it to the gate it will push the gate open independant of manifold pressure.

 

it would seem that you would need a one way valve in the boost line and a bled valve along with the co2 port afterwards...

 

It will push the gate open if I apply the Co2 to the bottom correct? And add psi (close) when I apply it to the top?

 

The MSD controller has 2 one way valves. One to regulate pressure to the top of the gate, and one to vent. They have a configuration that includes 2 regulators for the co2. One before the controller side (top), and one before the bottom of the gate.