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2 

Mega 350/450

 

Delay Box

 Instructions 

Digital Delay

, the company that invented and patented the Crossover, and the Driver’s Reaction Tester, designed and 

manufactured the 

Mega 350/450

 especially for racers who race both Brackets and Pro Tree racing.  The Mega 350/450 has two operating 

modes, Bracket mode and Pro mode.  Both modes have their own settings, which are retained in memory when either the mode is turned off 
or even if power is removed from the Mega 350/450.  

Contents: 

Warranty and Disclaimer............................….............................................……………..... Page  1 
Features 

and 

Specifications..................................................................………….……….. Page 3 

The 

Terminal 

Strip...............................................................………….....................……… Page  4 

The Keypad and the LCD....................................................………….....................……… Page  5 
Bracket 

Mode 

Screens................................................................………….....................…. Page  6 

Screen 

1-- 

Setting 

Dial-Ins 

and Delay Times..........................……..…………… Page 6 

Bracket Mode Settings for Screen 2 ............................……............………................…… Page 7 

Setting and Displaying the Tap Up/Down Information…..….........……………. Page 7 
Clearing the How Late time and the tap count….............................……………. Page 7 
Setting Push-button Mode and Interrupt Time................................……………. Page 7
Setting the Selectable Function Output Mode  (S.F.O.)............………......……. Page 7 

Bracket Mode Settings for Screen 3 ............................…….........................………...…… Page 8 

Setting 

Starting 

Line 

Enhancer 

Time  (S.L.E.)..............…...........………....…… Page 8 

Setting the Programmable Throttle Stop Override (P.T.S.O.).....………...…….. Page 8 
Setting Time Ranges for Timer 1 and Timer 2.................….......………….…….Page 8 

Bracket Mode Settings for Screen 4 and 5 ..................……........….....…………........…… Page 9 

Setting timer 1 and 2 Stage Times and Throttle Modes..........……….....………. Page 9 

Bracket Mode Settings for Screen 6 ............................……..................………..........…… Page 9 

Clearing 

the 

Peak 

RPM............................................................………......…….. Page 9 

Setting 

Number 

of 

Cylinders ...............................................………..........…….. Page 9 

Setting Shift Modes, Shift Output Mode, and Shift Points.....……….....………. Page 10 
Testing the Shift Routine……………………………….......……….....……….  Page 10 

Pro 

Mode 

Screens.......................................................................................…………....….. Page 11 

Pro Mode Settings for Screen 1....................................................................…………..….. Page 11 

Setting the Shift Point and Shift Mode......…........................……….............….. Page 11 
Setting the Stage Times and Throttle Mode…..................………..................….. Page 12 
Setting 

the 

Delay 

Time………………......….....................….……................…..Page 12

 

How the Mega 350/450 work 

Understanding 

Pro 

mode……………………………..............................................………. Page 12 

The Push-buttons for Pro Mode………

............................................………. Page 12 

The Outputs for Pro Mode……………

............................................………. Page 13

 

The Pro Mode Tach and Peak RPM Recall

......................................………. Page  13

 

Understanding Common Pro and Bracket Mode Settings.......................………. Page 13 

Understanding 

Bracket 

mode……….………………..............................................………. Page 14 

Understanding 

the 

Dial-ins and Delays…...............................................………. Page 14 

Understanding 

the 

Tap 

Feature..…………..............................................………. Page 14 

Understanding 

the 

How Late.……………..............................................………. Page 15 

Understanding 

Push-button 

modes 

and Interrupt Time………...............………. Page 15 

Understanding 

the 

Selectable 

Function Output ( S.F.O.).......................……….  Page 15 

Understanding 

the 

Starting 

Line Enhancer..........................................…………. Page 

16

How 

the 

Programmable 

Throttle 

Stop Override Works..........................………. Page 17 

Understanding 

the 

4 

Stage Timer……….............................................…………. Page  17 

Explanation 

of 

the 

Peak RPM……………..........................................…………. Page  17 

Understanding 

Time 

and 

RPM Mode…………………….....................……….. 

Page 

18

Understanding the Drivers Reaction Tester….....................…………….....................…… Page 18 
Understanding the Replay Tach…(MEGA 450 Only).........…………….....................…… Page  18 
Understanding the Line Lock push-button.............................................…………..……… 

Page 

19

Understanding and Connecting a By-pass push-button or Two or More Outputs Together. Page 19 
Understanding How to Cancel a Timing Cycle using the Clear Key……………………… Page 19 
Accessories................................................................................................……………..…. Page  20 
Mounting 

and 

Wiring 

the Unit........................................................………………............. Page 21

Summary of Contents for MEGA 350

Page 1: ...mnify DIGITAL DELAY INC against damages claims and expenses arising out of subsequent sales of or use of DIGITAL DELAY INC products or products containing components manufactured by DIGITAL DELAY INC and based upon personal injuries deaths property damage lost profits and other matters which BUYER its employees or sub contractors are or may be to any extent liable including without limitation pena...

Page 2: ...or Screen 6 Page 9 Clearing the Peak RPM Page 9 Setting Number of Cylinders Page 9 Setting Shift Modes Shift Output Mode and Shift Points Page 10 Testing the Shift Routine Page 10 Pro Mode Screens Page 11 Pro Mode Settings for Screen 1 Page 11 Setting the Shift Point and Shift Mode Page 11 Setting the Stage Times and Throttle Mode Page 12 Setting the Delay Time Page 12 How the Mega 350 450 work Un...

Page 3: ...PM up to 5 times Works on 4 5 6 8 10 and 12 cylinder engines Selectable Function Output S F O with four separate functions Secondary transbrake Second throttle stop timer Starting Line Enhancer S L E Line Lock Controller Programmable Tap Up Down feature for the delay Programmable Throttle Stop Override for the 4 Stage Timer A second 4 Stage Timer Programmable Starting Line Enhancer Built in driver...

Page 4: ... on setting button modes and double hitting the tree Recommended 16 Ga Wire or 18 Ga Corded buttons Button 2 Terminal This terminal is only used if the driver intends to double hit the tree with two separate buttons push button mode 2 Connect the P B 2 terminal to either wire from a second hit push button The other wire from this button is then connected to ground Recommended 16 Ga Wire or 18 Ga C...

Page 5: ...ight side of the LCD from one line to the next 4 The Clear key is used to blank out a number so that a new number can be entered 5 The Up and Down arrows are mainly used to make small changes in a number The Liquid Crystal Display LCD The LCD is made up of text numbers and selection arrows The text is used to indicate the information displayed while the numbers are used to show the value of the in...

Page 6: ...screen seven or if the Mega 450 is displaying screen eight and the Set Up key is pressed and released the Mega 350 450 will go back to screen two To get back to screen one Bracket screen use the BRKT key This can be done from any screen including the Pro screen When viewing any of the first six screens there will be a set of arrows on the right side of the LCD These selection arrows point to the s...

Page 7: ...y press the Set Up key until the text P B Mode is displayed on the left side of line 3 The P B Mode information displayed is made up of two parts separated by a blank space The left most digit indicates which button mode the Mega 350 450 is in and the right two digits represent the Push button Interrupt Time in seconds To change the Push button Interrupt Time repeatedly press the Next key until th...

Page 8: ...eatedly press the Next key until the selection arrows are on line 2 Then press and release the Clear key followed by the Next key To turn on the P T S O or enter a new P T S O amount repeatedly press the Next key until the selection arrows are on line 2 Next press and released the Clear key the selected display line will now be blank indicating the unit is ready to accept the new time Now using nu...

Page 9: ...e time will scroll down Note Entering all zeros into any stage turns that stage off The Throttle Modes for Timer 1 and 2 are displayed on screens 4 and 5 respectively Keep in mind that the S F O mode must be 2 for screen 5 to be viewable The words off on off on or on off on off to the left of the Stage times indicate the two possible Throttle modes To change the Throttle mode press and hold down t...

Page 10: ... four digits are entered for a Shift Point pressing the Next key will act as an enter key and the leading zeros will be displayed on the LCD As the numbers are entered they are shown on the display indicating the numbers are accepted and entered into memory If a mistake is made while entering the Shift Point press and release the Clear key and reenter the Shift Point again The last way to change t...

Page 11: ... release the Next key The selection arrows will move to the next line on the screen If the line selected is at the bottom of the screen the selection arrows will return to the top of the screen when the Next key is pressed and released again Pro Mode Settings for Screen 1 Setting the Shift Point and Shift Mode To enter a new Shift Point the Mega 350 450 must first be displaying the Pro screen When...

Page 12: ...e the Clear key the Delay time will now be blank indicating the unit is ready to accept a new time Now using numerical keys enter the new time leading zeros do not have to be entered For example if 0 010 for a Delay time were desired 10 would be entered on the keypad If less than four digits are entered for a time pressing the Next key will act as an enter key and the leading zeros will displayed ...

Page 13: ... This completes a Shift on RPM The Pro Mode Tach and Peak RPM Recall If the engine is turned off and the number 9 key is pressed and held the Peak RPM will be displayed in place of the Shift point Pressing and releasing the number 7 key will clear the current Peak RPM value If the selection arrows are on any line except line 1 and the engine is on the Shift Point will be replaced by the Tach and t...

Page 14: ... top yellow The Delay 2 time can be used even if the main Crossover delay is not being used however this is not recommended For this example of two hits at the tree two buttons are used and the Push button mode is set to two The vehicle would be staged and both push buttons would be pressed and held This would engage the Transbrake and the words Transbrake On would be displayed on the screen When ...

Page 15: ...e of this feature is to protect against the reapplication of the Transbrake solenoid by accidentally hitting a push button connected to either P B 1 or P B 2 while making a pass Selectable Function Output S F O The Selectable Function Output is a single output that can be programmed to function in four separate ways Each of the separate functions is listed below with an explanation of the setting ...

Page 16: ... push button is released If this is desired simply enter all nines 99 99 If all zeros 00 00 are entered the throttle will open up when the Transbrake releases Using all ones 11 11 will pre set the release of the throttle at eight tenths of a second before the Transbrake releases This means that approximately two tenths of a second after your top yellow the throttle will open up The benefit of the ...

Page 17: ...he racer understand the 4 Stage Timer when controlling a throttle stop The 4 Stage Timer can also be used to control other timed devices nitrous or timing retarders Stage 1 represents when the throttle stop turns on Stage 2 represents the amount of time duration the throttle stop will stay on Stage 3 represents when the throttle stop will turn on the second time during the run Stage 4 represents t...

Page 18: ... the 30 second resets NOTE When in the Driver s Reaction Test Mode the Transbrake solenoid will not be activated when a push button is pressed This is to prevent any damage to the solenoid from over heating Understanding the Replay Tach Mega 450 Only The Mega 450 has a built in replay tach that has two record speeds The HI speed records for 15 seconds while the LO speed records for 30 seconds To v...

Page 19: ... both be connected to the Line Lock terminal This will automatically arm the Replay Tach recording feature when a burn out is done using the Line Locks and eliminate the need for a separate record push button Understanding and Connecting a By pass push button or Two or More Outputs Together A by pass push button is used to engage the Transbrake solenoid without starting a timing cycle This can be ...

Page 20: ...20 Accessories Mega 450 Only Shown smaller then at actual size ...

Page 21: ...ngled towards the driver s eyes Before mounting the Mega 350 450 place the box in the desired location and check the legibility of the display in both day and night conditions As shown below the lower the box is placed below eye level the more the angle amount needs to increase for viewing Wiring the Mega 350 450 Driver Dash Box Driver Dash Box ...

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