posted
In the January 2002 issue of Chevy High Perfomrance on page 116 there is an explanation of the way E.T. and 1/4 speeds are calculated.
One part puzzled me.
"First, the elapsed time (e.t.) is measured from the stage beam - an infared beam across the track at the starting line - to the quarter-mile finish line mark. This is the only measurement of elapsed time. Reaction time is the time between the last yellow bulb on the tree coming on, and when your car leaves the stage beam. You could sit on the starting line for an hour after the tree has turned green and this would not affect your e.t. The timer only starts after you leave that stage beam."
My question is - if that's the case why measure the R.T. at all. In bracket racing we all watch the E.T. but keep working on the R.T. as well. I could see in heads up car to car without e.t. measured r.t. is important - but in brackets???
Any one know?
-------------------- Hawkeye: SSOA F98-C98
1998 SS - Black All Options - Mods Whisper Lid, K & N, Lou's Short Stick, Shift Light, Skip Shift, SLP Y, Borla, 4:10's, BMR STB, SLP SFCs, Granatelli MAF, Hypertech III, 160 Stat, Mallory Billet Pedals, Metco Aluminum LCAs,Fast Toys Ram Air Mod, Spohn Panhard Bar, BMR Torque Arm, free EGR mod,power antenna, BMR LCA brackets, Gentex Temp/Compass Auto Dim Mirror, AllMaxx Strobe and Wig Wag, BAER Eradispeed rotors,PPC Headers with Random Technology Hi Flow Cats, BMR Drive shaft Loop,FAST 78MM Throttle Body, FAST 78MM Composite Intake, Mobil 1 & lots of Zaino.
Even in bracket racing, who crosses the finish line first (staying under or at their dial in) wins. The dial in determines how much of a handicap there is. For instance, if both cars had the same dial in and ran the same ET, the guy with the better RT wins. I think this is how it works.
Posts: 5946 | From: Litchfield, NH, USA | Registered: Feb 2000
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posted
I understand the differential to dial in in bracket, so, what you are saying is that the only time the reaction time means anything is if the bracket differential is dead even between the 2 cars?
-------------------- Hawkeye: SSOA F98-C98
1998 SS - Black All Options - Mods Whisper Lid, K & N, Lou's Short Stick, Shift Light, Skip Shift, SLP Y, Borla, 4:10's, BMR STB, SLP SFCs, Granatelli MAF, Hypertech III, 160 Stat, Mallory Billet Pedals, Metco Aluminum LCAs,Fast Toys Ram Air Mod, Spohn Panhard Bar, BMR Torque Arm, free EGR mod,power antenna, BMR LCA brackets, Gentex Temp/Compass Auto Dim Mirror, AllMaxx Strobe and Wig Wag, BAER Eradispeed rotors,PPC Headers with Random Technology Hi Flow Cats, BMR Drive shaft Loop,FAST 78MM Throttle Body, FAST 78MM Composite Intake, Mobil 1 & lots of Zaino.
Wife & Best Friend Mary - copilot. Posts: 5558 | From: Windsor, Ontario. Canada | Registered: Feb 2000
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quote:Originally posted by Hawkeye: I understand the differential to dial in in bracket, so, what you are saying is that the only time the reaction time means anything is if the bracket differential is dead even between the 2 cars?
Doesn't matter what the dial-ins are.
Reaction Time plus how much over the dial in would determine the winner.
If I dial 13.50 and run 13.60 with a .600 reaction time, and you dial 13.80 and run 13.90 with a .599 reaction time ... you win.
Reaction time is the best way to win bracket races.
Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000
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posted
Yea, what Art said. I know it is hard to conceptualize, that is why I said same dial ins. The same holds true if the dial ins are different. It was just easier for my meager mind to grasp. It is the relation of RT to dial in to ET that wins.
Of course, TAS is right for the street. But how would I know??
[ 26 November 2001: Message edited by: DanA_F99_1977 ]
Posts: 5946 | From: Litchfield, NH, USA | Registered: Feb 2000
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posted
O.K. - I think - but is it dial in differential plus the r.t. or is the r.t. only figure in if the differentials are even.
for example - I dial in 13.50 and run 13.60, you dial in 13.50 and run 13.55 - do you win regardless of your r.t.? Or, if my r.t is .6 and yours is .8 - do I win? See what I'm getting at?
-------------------- Hawkeye: SSOA F98-C98
1998 SS - Black All Options - Mods Whisper Lid, K & N, Lou's Short Stick, Shift Light, Skip Shift, SLP Y, Borla, 4:10's, BMR STB, SLP SFCs, Granatelli MAF, Hypertech III, 160 Stat, Mallory Billet Pedals, Metco Aluminum LCAs,Fast Toys Ram Air Mod, Spohn Panhard Bar, BMR Torque Arm, free EGR mod,power antenna, BMR LCA brackets, Gentex Temp/Compass Auto Dim Mirror, AllMaxx Strobe and Wig Wag, BAER Eradispeed rotors,PPC Headers with Random Technology Hi Flow Cats, BMR Drive shaft Loop,FAST 78MM Throttle Body, FAST 78MM Composite Intake, Mobil 1 & lots of Zaino.
quote:Originally posted by Hawkeye: O.K. - I think - but is it dial in differential plus the r.t. or is the r.t. only figure in if the differentials are even.
for example - I dial in 13.50 and run 13.60, you dial in 13.50 and run 13.55 - do you win regardless of your r.t.? Or, if my r.t is .6 and yours is .8 - do I win? See what I'm getting at?
You win, by 0.15 Next example I get to win, okay
Posts: 4222 | From: Winnipeg MB CA | Registered: Feb 2000
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1998 SS - Black All Options - Mods Whisper Lid, K & N, Lou's Short Stick, Shift Light, Skip Shift, SLP Y, Borla, 4:10's, BMR STB, SLP SFCs, Granatelli MAF, Hypertech III, 160 Stat, Mallory Billet Pedals, Metco Aluminum LCAs,Fast Toys Ram Air Mod, Spohn Panhard Bar, BMR Torque Arm, free EGR mod,power antenna, BMR LCA brackets, Gentex Temp/Compass Auto Dim Mirror, AllMaxx Strobe and Wig Wag, BAER Eradispeed rotors,PPC Headers with Random Technology Hi Flow Cats, BMR Drive shaft Loop,FAST 78MM Throttle Body, FAST 78MM Composite Intake, Mobil 1 & lots of Zaino.
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Next example I get to win, okay 
