Hi I have just brought a NOS cheetah nitrous kit and wanting to hook it up. I also have these following parts to hook up. Also have a msd 7al3 ignition in car. Also are 20amp relays enough and what amp wire would you suggest. Is it possible for you to do me a diagram for all of this setup. I know one thing that with me on the transbrake with foot flat to the floor it would normally activate the micro switch. I know there must be a way around this. Any help would be much appreciated.

Cheers Dean

NOS Single Stage Plate System- Cheetah
Nitrous Progressive Controller Part # 15835BNOS
Purge
Nos Thermostatically Controlled Bottle Heater
Transbrake
Wot Switch
Fuel Pressure Switch
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20 Amp relay is too small.
You need to know the total amp draw of all your solenoids combined to determine the correct relay.

If you install a 5 wire relay inline with your micro switch and nitrous relay, then activate it buy wiring it to your transbrake button, you'll be able to deactivate your nitrous while on the T-Brake.

 

What relay would i need for this setup then.

 

According to that diagram, NOS is using a 30 AMP fuse.
A 30 amp 5 terminal relay would probably be sufficient.
You should always verify your total amp draw from all solenoids regardless...

FWIW... NOS usually supplies a 5 terminal relay with a 4 wire pigtail with their systems. You just need to add 1 wire to the connector.