TELFORD said:
.......... Someone please explain the dialed in time to me please. didnt understand that.
OK....this is called 'bracket racing'. What it does is level the field from the
have $$$$ to the others of us that get by with $$. Basicly the dialin is a prediction of how fast you think your car will run vs. your opponent and how fast they think their car will run. Whoevers closest without going faster than their dial in wins.
The ida is to have both cars cross the finish line at the same time if they run on their 'dial-in'. You dial in your car to hit the time YOU write on your window. You go faster (that's called a 'breakout'), you lose, you go just slower (ideal is hundreths of seconds slower than your dial in), you win if you cross the finish line (1320 ft. away) before the other car.
You can race WHATEVER you bring as long as it passes tech. Lets just say you have a 15.5 second 350 '70 Malibu (mostly stock, small block) for argument/illustration purposes. The absolute FASTEST time slip you have for this care is 15.42 on a cool night when you had the carb dialed in and the car felt 'sweet'. Your first 3 'practice/tuning' passes of the day are at the following.
1:30 pm: 85 degrees; 30% humidity; reaction time .658 = 15.92 @ 88 mph
3:30 pm; 79 degrees; 30% humidity; reaction time .592 = 15.67 @ 92 mph
4:50 pm; 75 degrees; 30% humidity; reaction time .580 = 15.67 @ 93 mph
(for sake of argument, you had NO wheelspin, didn't miss a shift and ran in the same lane all three times. Your reaction times are getting better every time you've raced, so you're feeling pretty good.)
They start racing at 6 pm and your class is one of the first up. To Race, you need to enter a 'dial in' in your window (so the tower can see it and 'set' the tree to your time). Your '70 Malibu draws a 13.5 second big block '69 Camaro. In heads up racing.......you pretty much have to hope the guy breaks to even have a chance (AH, the beauty of bracket racing). Not so fast.....
The tree operator sets the lights (remember the three ambers and one green (oh, and there's the red) for BOTH cars at whatever your 'dial in' is. YOU CANNOT GO FASTER THAN YOUR DIAL IN OR YOU LOSE!!!!!!! The only way you have a chance to win against the 13.5 second Camaro is if he has to wait on the starting line for just over two full seconds while you bust down the track to get your head start. If BOTH cars run on their index (extremely rarely, if ever happens) you will have a DEAD tie through the lights.
You hit an OK light and you're off. You do notice as you leave, the Camaro starts to rev to it's redline while it waits the two seconds for it's chance to leave. You let the trans shift (like you have all day) and hope the big block won't pass you before the lights.
The Camaro runs 13.56 on a 13.51 dial in. You can't even tell who won as you cross the lights because he came up on you so fast you couldn't believe it.
6:10 pm; 72 degrees; 30% humidity; reaction time .597 = 15.71 @ 94 mph with a dial in of 15.65 (your dial in logic is that you haven't went faster than that today and even though the temperature is going down, you think with your reaction time and how your car is performing that's a good number)
15.71
-15.65
______
0.06 +
Your oponnent ran
13.56
-13.51
______
0.05 +
You just got beat by one hundreth of a second. However, it was a very close competitive race and neither of you knew who won until you got the timeslips at the booth at the end of the track. You're done. Shake the other guys hand and pack it up.
There's THOUSANDS of variables. If you cut a better light, you win. It really hurts to lose by hundreths or thousanths of seconds, but that's why the lights are there. Way too much fun (and intense) and there are so many ways to make your car more consistent/faster that it's hard to lose interest.