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Old Jun 1, 2011 | 05:30 AM
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Default slow motion of launch

I asked my friend, who video taped my run, to make a slo mo video of the launch to see how bad I spun. You can see it dead hooks off the line but when the nitrous kicks in it spins a good bit. My suspension setup is a djm 4/6 drop with flip kit and drop shocks. I made some tracion bars that are identical to caltracs. Im running 28x10/16 hoosiers with 13 psi on that run. I noticed the other day when I was looking under the truck that my pinion angle looks to be a couple degrees positive. Is that my main problem? I cut a 1.64 60' on that run. How much can I improve with setting my pinion angle and how negative do I want it? Here is the video

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Old Jun 1, 2011 | 07:08 AM
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Pinion angle isn't helping... You actually don't want to "dead hook" with zero tirespin as strange as that sounds. You need a little bit of spin to get the RPM up quicker, you just want to be able to minimize the spin and control it. But just turning the tire over a little faster than your moving isn't a bad thing.
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Old Jun 1, 2011 | 07:11 AM
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Also just noticed you're just down the rd in LA... Bring that thing to Evadale if you haven't already. It's always good to see more trucks coming out.
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Old Jun 1, 2011 | 07:45 AM
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^ agreed u dont want to dead hook that will lead to bad things happening to the rear end unless its built to the hilt.........
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Old Jun 1, 2011 | 08:26 AM
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I thought with stick cars you want some spin but autos you want a dead hook because the converter dampens the blow on the drivetrain. And Im not in Slidell very often anymore, My parents live there but I go to Louisiana Tech, but I only have a little over a year left then I'll be back down here. Am I wrong about the spinning and hooking?
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Old Jun 1, 2011 | 01:08 PM
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I'm interested in hearing more about this too.
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Old Jun 1, 2011 | 01:54 PM
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My best 60 has been dead hooking with an auto and transbrake.
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Old Jun 1, 2011 | 10:45 PM
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With a high stall converter yeah. A dead hook should be "ideal" but with a tighter converter ( or a manual i suppose) turning the tires over a little faster than the truck is moving will accelerate faster. It has a lot to do with your entire setup along with power levels. On a lower powered vehicle, wheel spin will help, higher power levels, it'll hurt...

Of course this is a generality, every setup will vary. And if it's being hard on parts you're worried about, don't take it to the track
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Old Jun 2, 2011 | 12:22 AM
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definitely not worried about being hard on parts... if it breaks, ill build it better. I just going to set my pinion angle and see if that improves my 60' i want to cut a 1.5x before i do any engine work.
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Old Jun 2, 2011 | 01:20 AM
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Better shocks would probably help. I'm in the "dead hook" is better for et camp.
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