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Finally got the truck to the track and quickest pass was a 12.7 at 107 mph with a 2.003 60 ft. Trying to get it down to 12.5 or under any ideas would help. I am running a 295/65/15 mickey Thompson drag radian with 15 psi in them.

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What do you have for rear gears and a converter? Looks like theirs an easy 2 tenths to be had in the 60 foot. What is the engine setup?

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its a 400 sbc with weiand 177 6 psi boost 3.73 gears turbo 350 trans and tci 3500 converter

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Cal tracs for leaf springs.
If its truck arm read up on super 73's post's

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Every tenth in 60'= about 2/10's down track .

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What year truck?
What has been done to the suspension? (Shocks/springs)
How are you doing your burn out? How long and are you rolling out of it?

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its a 71 longbed stock shocks and lowering springs, not doing a huge burnout but am rolling out

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Assuming it is a trailing arm and not leaf?

Front lowering sporting is not helping transfer weight to the rear. Too short/stiff.

How long of a burn out, 5 sec then rolling out?

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it is a coil spring rear, and probly about 5 sec burnout

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Is it even spinning, or just a dog out of the hole?

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Spins a little then hooks up

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Sounds like you need a different front spring to start. Do toy know what it weighs? Front and rear axle weights would be most helpful.

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I'd try a set of pure slicks and try to bring up your launch RPM a bit so you are into a bit of boost.

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http://m.youtube.com/watch?feature=y...&v=vZmjK0RmwoY

Here is a link to the pass not the best video

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A 177 being a smaller roots blower should be building boost pretty fast. I would assume at 3500 rpm it is doing good making torque.

A slick might help, but you still run the issue of not transferring weight to the rear. I used to have lowering springs and I don't now.

Your radial is not much smaller than mine, they work just fine if you can tune the suspension which you can't right now.

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Just watched the video.

What gear are you doing your burn out?

It is hard to see in the video but it sure looks like it leaves flat and doesn't transfer. I watched the video a few times.

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1st gear burnout and it does leave flat

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You need to get more heat in that tire. 1st gear burn outs will not spin it fast enough. Get it in high gear with 5k rpm add quick as you can. That alone well help the reaction issue, might not take it away completely.

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I'm heading back again friday I'll heat them up more and see what happens

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Did you make it back to the track last night like you were thinking?

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No got rained out

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Bummer.. was hoping to see a new best.