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Drag Racing Discussion Post your questions and info about how to best get these beasts down the 1320!


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  #1  
Old 08-03-2010, 09:43 AM
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Default 1/4 mile setup question

When racing in the 1/4 mile, which is better and why? Tow/Haul on or off? And since the truck seems to make the perfect shift automatically..... shifting vs. auto?
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Old 08-03-2010, 09:52 AM
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I say tow/haul for the change in shift points but why not experiment with both at the track and post the ET differences?
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Old 08-03-2010, 10:00 AM
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Thanks, will do as soon as I can.
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Old 08-03-2010, 10:07 AM
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I took my truck to the 1/8 Friday and found the best combo was Tow/Haul and letting the truck shift automatically.
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Old 08-03-2010, 10:31 AM
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Thanks txhemi
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Old 08-03-2010, 10:56 AM
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My pleasure.
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Old 08-03-2010, 11:00 AM
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so tow/haul is ok to use when racing the 1/4 mile? I always thought that the gear ratio is so much lower, that it would put more stress on the engine, and tranny...
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Old 08-03-2010, 11:16 AM
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From the manual:
When operating in “TOW HAUL” mode, 5th gear (if equipped) is disabled and 2-3 and 3-4 shift patterns are modified. Shifts into Overdrive (4th gear) are allowed during steady cruise (for improved fuel economy) and automatic closed throttle downshifts to 3rd gear are performed (for improved braking) when driving conditions warrant. Pressing the “TOW HAUL O/D OFF” button a second time to select O/D OFF will disable 4th and 5th gear completely, which should eliminate any excessive transmission shifting.
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Old 08-03-2010, 06:49 PM
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I did my best times with tow/haul AND manual shifting at 6300 rpms for each shift...
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Old 08-03-2010, 11:24 PM
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thanks chefred112...... this is one awesome site !!!!
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