A challenge is a challenge regardless of what you have. No-one should moan and both sides should be prepared to do whatever they can to destroy the opposition
Remove your rear bench & backs, remove the spare wheel and replace with a can of foam, remove the passenger seat and that lot will remove over 60kg from the car. That in itself will give you 0.1-0.2 seconds off the 1/4 mile.
Short shifting from 1st to second after using launch control helps stop any wheelspin you may get off the line. Wind out the car in 4th gear to the end of the run as it will also help with your time.
Lower tyre pressure will help reduce wheelspin too, so if you can reduce the pressure down to around 22psi. Even better get some semi-slicks on there.
Always try and do a burnout if you can before a run, it clears the water off the tyres and warms them up a little.
Good luck!