How to avoid backfire when tuning a nitrous car?

[wesam]

How to avoid backfire when tuning a nitrous car ?
what tips could i do ?

[BLK02WS6]

If you have correctly setup window switch, you shouldn't have a problem. Also, avoid overly rich mixtures - tune by plugs - you can use the wideband as a guide, but it is not the end-all when on the jug...

[wesam]

what do you mean by tune by plugs
do you mean to check the plugs after each run ?

[BLK02WS6]

Yes, shut the engine down at WOT and inspect the plugs for fuel ring/timing mark. Pull the car back to the pits or swap some plugs on the return road - don't drive back to the pits as that will ruin the readings... It is the only way to accurately tune nitrous cars.