DRAG RACING GUIDE
 

All drivers can turn up on the day and race, but you will need to have all of that listed below. Our staff will explain all the rules and explain the Christmas Tree lights, we have volunteers that can help you with advice on the day, for any enquiries before race day contact any of our committee.

Car and Racer Requirements
You will have to have current registration and WOF, proper and up to date fitting helmet, long sleeves and long pants, good footware. Drivers Licence (restricted allowed & must be shown). Cars will undergo a basic safety check. Cars must have a radiator overflow bottle.

Sportsman regulations
Striping of streetcars on race day as discussed at NZDRA AGM August 2003

- Competitors can remove rear seat if fuel tank/cell is not exposed to drivers compartmant.
- Competitors can remove passenger seat.
- Competitors can remove one headlight only for air intake.
- Door trims must stay on. (Sharp edges on doorframe).
- Bonnet must stay on as per WOF regulations.

Streetcars must be in WOF condition to race and are not in that condition without door trims or bonnet. Although the headlight is a WOF item it is not deemed a safety issue for occupants or staff.

Weight savings are negated by the extra aerodynamic drag when the bonnet and grill are removed. The fastest cars in the world have the grill area blanked off for aerodynamics.

Drag Racing Terms
"Red Light" - is a foul start, this happens when the driver reacts to the "Christmas Tree" too quickly and drives his car away from the starting line before the green.

"Break-Outs" - should a driver go quicker than his/her predetermined "dial-in" or "fixed index" it is a "break-out", and grounds for disqualification. In the case of both vehicles making their runs under their dial in's, the win goes to the driver who breaks out the least.

"Reaction Time" - is the time the driver and car takes to react to the Christmas tree lights, the difference between the orange and green lights and the reaction of the driver to the lights. Note every .1 second startline reaction difference to your opposition is equal to a car length at the finishline at 160kph, you can win or loose on your reaction times.

Types of Drag Racing
D.Y.O - Dial your Own (Handicap System) - This form of racing is used for most Street class cars were the performance of cars is uneven. Using the D.Y.O handicap format allows the two vehicles of varying performance to race on an even basis. The slower car receives a head start equal to the difference of the two chosen times of the drivers.

For Example: During practice Car A has 17.70, 17.60 and 17.80 seconds, the driver chooses a "dial-in" of 17.55. Car B has recorded times of 15.20, 15.30 and 15.20 on the same track and he has opted for a "dial-in" of 15.15. So car A will get a 2.4 second headstart over car B when the computer controlled "Christmas Tree" counts down to each cars starting green lights.

If both vehicles cover the quarter mile in exactly their "dial-in" time, the win will go to the driver who reacts quickest to the starting signal. That reaction to the starting signal is called "reaction time". This fact makes starting line reflexes extremely important in drag racing! (See "Red Lights" and "Breakouts" above)

Fixed Index - ie, Pro Street and Super Gas. This form of racing is for vehicles who qualify within a 1 second time bracket (Pro Street 10.90 to 11.90 seconds, and Super Gas 9.90 to 10.90 seconds). Both sides of the Christmas Tree start simtainiously - a "Heads-up" start (this again makes starting line reflexes, "reaction time" extremely important). First to the finishline wins. But, go faster than your class index (Pro Street 10.90, or Super Gas 9.90) and it is a "break-out", and grounds for disqualification.

Personal Index System - This is used for PBDRC's Pro Comp class. Pro Comp is essentially the top (fastest) class and uses this handicap system to allow any two vehicles of varying performance to race on an even basis. The competition vehicles in Pro Comp vary greatly: -/D = Dragster, -/FC = Funny Car, -/A = Altered, -/EC = EconoComp, -/TS = Top Street, -/SR = Street Rod, -/SM = Street Machine, etc. Plus varying engines: big blocks, small blocks, supercharged, nitrous oxide, carburetted, injected, methanol, gas, etc.

Every competition vehicle is built to, and classified into, a National class and power to weight bracket within each of those classes. There is an E.T (elapsed time) National record for every weight bracket of every class. A vehicle that qualifies in Pro Comp (9.50 seconds and faster) will race under a "Personal Index" time used for a handicaped start. The slower car receives a head start. The vehicles "Personal Index" is initially determined by National (E.T) record plus 1 second.

But unlike the D.Y.O handicap format, in the "Personal Index System" there is NO "breakouts". If a vehicle goes faster than its "Personal Index" by more than 0.2 seconds its "Personal Index" will be lowered for any future racing. The "Personal Index" is allowed to be beaten by a 0.2 second buffer - half of anything over 0.2 will be taken off a vehicles "Personal Index".

For Example: As determined above, a vehicle would have the "Personal Index" of 10.19 seconds. However, if that car did a 9.39 E.T its "Personal Index" would be lowered to 9.89 seconds for any future racing - "Personal Index" was 10.19 seconds. A 0.2 second buffer is allowed (so an E.T of 9.99 or slower would not affect the "Personal Index"). Then, half of anything over 0.2 (anything faster than 9.99) will be taken off the vehicles "Personal Index" - the difference between 9.99 and the 9.39 E.T is 0.6 seconds. Half of 0.6 = 0.3, so 0.3 seconds is taken off the initial "Personal Index" of 10.19 seconds - ie, the new "Personal Index" of 9.89 seconds.

If in thier next run the vehicle did another 9.39 E.T its "Personal Index" would then be lowered to 9.74 seconds - and so on, and so on...

In summary: every vehicle has a "Personal Index", that time is used to determine the handicaped start. The slower car receives a head start equal to the difference of the two times of the vehicles.

Please Remember
NO Smoking and NO Alcohol in pit area.

Children must be well supervised


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