Speed Racer

 When it comes to speed, a deck that is able to draw more than the others has the advantage of being able to to gain access to its key cards faster. In fact, most FTK decks capitalize on this concept by running 1 or more draw engines to thin their decks. But engines aren't limited solely to draw cards. They can function in recycling cards or maintaining field presence. Today I'll be listing some engines that can be incorporated in various decks to courtesy of Pojo user Yukichi:

Original Link: http://www.pojo.biz/board/showthread.php?t=864893

Synchro Cat:
3 X-Saber Airbellum
1 Rescue Cat

1 Summoner Monk
0-1 XX-Saber Darksoul 

Lightsworn:

0-2 Lyla, Lightsworn Sorceress
2-3 Ryko, Lightsworn Hunter
1 Charge of the Light Brigade

Plant:

2 Lonefire Blossom
2 Dandylion
1 Tytannial, Princess of Camellias
1 Spore

Flamvell:

3 Flamvell Magician
2-3 Flamvell Firedog
2-3 Rekindling
1 Summoner Monk

Gravekeeper:

2-3 Gravekeeper's Spy
0-1 Gravekeeper's Descendant
0-1 Gravekeeper's Guard

Frog Tribute:

2 Treeborn Frog
3 Swap Frog
3 Substitoad
1-2 Ronintoadin

Dandy Warrior:

2 Dandylion
2-3 Quickdraw Synchron
3 Drill Warrior

Machina:

2-3 Machina Gearframe
2-3 Machina Fortress
0-2 Machina Peacekeeper
0-2 Machina Force

Macro:
0-3 D.D. Survivor
0-3 Cyber Valley
0-3 Caius the Shadow Monarch
1-2 Macro Cosmos
2-3 Dimensional Fissure

Gadget:
2-3 Green Gadget
2-3 Red Gadget
2-3 Yellow Gadget 

Zombie:
1 Mezuki
1 Plaguespreader Zombie
1-3 Zombie Master
1-2 Goblin Zombie

Super-Nimble:

3 Ryko, Lightsworn Hunter
1-2 Super-Nimble Mega Hamster

Volcanic:

3 Volcanic Rocket
3 Volcanic Shell
1 Summoner Monk
1-2 Blaze Accelerator

Destiny Draw:
1 Elemental Hero Stratos
2 Destiny Hero Malicious
1-2 Destiny Hero Dasher
1 Destiny Draw

1 Allure of Darkness

Appropriate:
1-3 Hand Destruction
1 Card Destruction
1 Morphing Jar
2-3 Appropriate

E-Teleport:

1-3 Krebons
0-1 Psychic Commander
1 Emergency Teleport

Deep Sea Diva:

2-3 Deep Sea Diva
0-1 Reese The Ice Mistress
0-1 Spined Gilman

Counter Fairy:
3 Bountiful Artemis
3 Dark Bribe
2-3 Divine Wrath
1 Solemn Judgment

Genex:
2-3 Genex Controller
1-2 Genex Undine
1-2 Genex Neutron
0-1 Genex Spare

Gemini Spark:
1 Elemental Hero Stratos
3 Elemental Hero Neos Alius
3 Gemini Spark
2-3 Emergency Call
0-2 Hero Blast 

Geartown:
2-3 Geartown
1-3 Ancient Gear Gadjiltron Dragon

Fortune Lady:
1-3 Fortune Lady Light
1-3 Fortune Lady Dark
1-3 Fortune Lady Water
1-3 Fortune's Future
1 Future Visions

Reptilianne:

2-3 Reptilianne Gardna
1-3 Reptilianne Naga
1-2 Reptilianne Vaskii
0-3 Offering to the Snake Deity

Toon:

3 Royal Magical Library

3 Toon Table of Contents
1-3 Of Any Toon Monster
2-3 Magical Citadel of Endymion

Dragon Draw:

3 Cards of Consonance
3 Legendary White Stone
3 Blue-Eyes White Dragon
3 Trade-In
3 Super Rejuvenation

Reptile Worm:

2-3 Worm Cartaros
2-3 Worm Xex
2-3 Worm Yagan
0-3 Worm Jetelikpse

Malefic:

3 Malefic Stardust Dragon
0-3 Malefic Blue-Eyes White Dragon
0-3 Blue-Eyes White Dragon
0-1 Allure of Darkness.
1-3 Trade-In
1-3 Advance Draw
0-2 Magical Mallet

Koa'ki Rock:

2-3 Koa'ki Meiru Guardian
2-3 Koa'ki Meiru Sandman
0-3 Koa'ki Meiru Prototype

Immortal Bushi:

2-3 The Immortal Bushi
2-3 Armageddon Knight
1 Necro Gardna
1 Reinforcement of the Army

DARK/WIND Fortune:

1-3 Fortune Lady Dark
1-3 Fortune Lady Wind
1-3 Dark Simorgh
1-3 Fortune's Future
1-2 Gold Sarcophagus
1 Allure of Darkness
0-1 Foolish Burial 

Reinforce Truth:

1 Reinforce Truth
2 X-Saber Pashuul

Neo-Spacian:

2-3 Convert Contact
2 Neo-Spacian Glow Moss
2 Neo-Spacian Dark Panther
1 Neo-Spacian Grand Mole
0-1 Neo-Spacian Aqua Dolphin or Neo-Spacian Flare Scarab
2 Cross Porter

Alchemy/Valley:
3 Cyber Valley
2-3 Battle Fader
2-3 Dimensional Alchemist
1 Plaguespreader Zombie 

Roid:
3 Armoroid
3 Expressroid
0-2 Drillroid
3 Supercharge
1-3 Trade-In
2-3 Reckless Greed

Greed/Mask:
2-3 Mask of Darkness
2-3 Reckless Greed

Machine Duplication:
3 Tuningware
0-3 Darksea Rescue
0-3 Cyber Valley
2 Machine Duplication
0-2 De-Synchro 

The list is by no means complete but it is a good reference for any duelist. I'll be updating this post as the original link gets revised.

Remember players, the game ends with you.