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Old 07-28-2014, 04:56 PM   #1
glljr
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1/4 mile

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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Old 07-28-2014, 05:05 PM   #2
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Re: 1/4 mile

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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Old 07-28-2014, 05:07 PM   #3
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Re: 1/4 mile

its a 400 sbc with weiand 177 6 psi boost 3.73 gears turbo 350 trans and tci 3500 converter
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Old 07-29-2014, 01:57 AM   #4
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Re: 1/4 mile

Cal tracs for leaf springs.
If its truck arm read up on super 73's post's
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Old 07-29-2014, 05:00 AM   #5
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Re: 1/4 mile

Every tenth in 60'= about 2/10's down track .
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Old 07-29-2014, 10:44 AM   #6
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Re: 1/4 mile

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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1/8---6.58 @ 105.92----5.87 @ 118.41
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Old 07-29-2014, 11:47 AM   #7
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Re: 1/4 mile

its a 71 longbed stock shocks and lowering springs, not doing a huge burnout but am rolling out
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Old 07-29-2014, 02:34 PM   #8
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Re: 1/4 mile

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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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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Old 07-29-2014, 04:38 PM   #9
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Re: 1/4 mile

it is a coil spring rear, and probly about 5 sec burnout
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Old 07-29-2014, 06:21 PM   #10
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Re: 1/4 mile

Is it even spinning, or just a dog out of the hole?
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Old 07-29-2014, 09:24 PM   #11
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Re: 1/4 mile

Spins a little then hooks up
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Old 07-29-2014, 09:36 PM   #12
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Re: 1/4 mile

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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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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Old 07-29-2014, 09:36 PM   #13
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Re: 1/4 mile

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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Old 07-29-2014, 09:48 PM   #14
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Re: 1/4 mile

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

Here is a link to the pass not the best video
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Old 07-29-2014, 11:35 PM   #15
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Re: 1/4 mile

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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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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Old 07-29-2014, 11:40 PM   #16
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Re: 1/4 mile

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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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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Old 07-30-2014, 07:38 AM   #17
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Re: 1/4 mile

1st gear burnout and it does leave flat
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Old 07-30-2014, 01:00 PM   #18
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Re: 1/4 mile

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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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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Old 07-30-2014, 01:23 PM   #19
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Re: 1/4 mile

I'm heading back again friday I'll heat them up more and see what happens
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Old 08-02-2014, 10:43 AM   #20
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Re: 1/4 mile

Did you make it back to the track last night like you were thinking?
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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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Old 08-03-2014, 09:24 PM   #21
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Re: 1/4 mile

No got rained out
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Old 08-03-2014, 11:19 PM   #22
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Re: 1/4 mile

Bummer.. was hoping to see a new best.
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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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