if your car has a carburettor (i think it will at that age), then follow these intructions in quick succession.

1. get to 30mph in 2nd gear

2. lift foot off throttle

3 turn ignition keys off (just one click so it doesn't lock steering)

4 wait 2 or 3 seconds

5 turn ignition back on

6 laugh very loudly

once you get the hang of it, you can change things like pressing a little trottle while ignition is off (this tends to give a richer slower burning woof type noise and yellow flame) instead of a shotgun style crack .

the addition of a big bore style exhaust will increase the noise tremendously.

I had my car searched by the police for guns twice as they thought i was shooting from car.

the car did not seem to get damaged at all. I had a vauxhall cavalier 1.6 carb engine and did this at least 50 times a day for 6 months without any problems (except police attention!)

good luck, have fun!