LML fast e.t. questions - Chevy and GMC Duramax Diesel Forum
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post #1 of 18 (permalink) Old 11-28-2015, 11:56 AM Thread Starter
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LML fast e.t. questions

Whats the best way to launch these trucks? I've spent a lot of time at the track in lsx cars but never a diesel truck. From what I understand launching in 4x4 building boost at the line is the way to go. Any other tips? Does tow/haul make a difference? Also, if I'm sitting there at the line boosting is it going to fry my turbo by building too much heat? My truck is a leveled 2011 denali 2500 deleted with kory tunes. Fastest time stock was 15.3 @ (I believe) 84.

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post #2 of 18 (permalink) Old 11-28-2015, 11:57 AM
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Turn on tow/haul.....BUT, you better turn the torsion bars down or you will be breaking tie rods when you launch...

2015.5 Denali 2500 on 35's at factory height...sold
2008 lmm......sold
2003 gmc RCSB with 6.0 and 4L80 for now...
2000 Camaro ss with 5.3 and s480 billet wheel...
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post #3 of 18 (permalink) Old 11-28-2015, 12:06 PM Thread Starter
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Good info. Should I just drop the front down enough to get the driveline angles as straight as possible or is there a sweet spot?

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post #4 of 18 (permalink) Old 11-28-2015, 12:46 PM
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Yeah get the angles back flat......But I would still be worried!! ha But that's just me and I can't afford to be down cause my truck is my money maker

2015.5 Denali 2500 on 35's at factory height...sold
2008 lmm......sold
2003 gmc RCSB with 6.0 and 4L80 for now...
2000 Camaro ss with 5.3 and s480 billet wheel...
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post #5 of 18 (permalink) Old 11-28-2015, 12:58 PM Thread Starter
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Yeah I'm due for some tie rods anyway so I'm gonna upgrade before the track opens next year anyway. I can't afford to break mine either because I think I'll end up single if I break another car… She knows every dollar that goes into a vehicle means 3 dollars fixing it and she's not having it anymore! I've got my truck and a camaro and I'm afraid to mod either one because if I break it I'll never hear the end of it..

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post #6 of 18 (permalink) Old 11-28-2015, 01:00 PM
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Might as well sell them cause they will break if you take them to the track...ha

2015.5 Denali 2500 on 35's at factory height...sold
2008 lmm......sold
2003 gmc RCSB with 6.0 and 4L80 for now...
2000 Camaro ss with 5.3 and s480 billet wheel...
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post #7 of 18 (permalink) Old 11-28-2015, 01:10 PM Thread Starter
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I just want one decent timeslip!!!

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post #8 of 18 (permalink) Old 12-05-2015, 05:54 PM Thread Starter
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Didn't realize the track was open all the way into december until a buddy invited me and I took the truck to see what it could do. Not terrible once I got the wheel hop under control.
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post #9 of 18 (permalink) Old 12-11-2015, 07:13 AM
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Same style of launch as the LSX auto stuff. Put the car up against the brakes to build boost...yes...sitting against the brakes for 2 minutes isn't good. However..in just the 10 seconds or so you are on them waiting for the tree the motor isn't going to melt down lol. the truck should easily be cutting 1.8 short times.

2009 Duramax: Tuned and Cognito'd. 295/60 20s on 20x10s.
99 Z28 Stripper: 5.3, T56, S378....Money pit
Gone: 02 Z28, 99 Z28, 98 T/A, 95 Firehawk #46 w/Factory red leather, 98 Z28, 01 Z28, 02 Z28, 94 Firehawk #170, 94 Z28 1LE, 94 Z28, 92 Z28
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post #10 of 18 (permalink) Old 12-11-2015, 02:11 PM Thread Starter
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Quote:
Originally Posted by 4u 2 nv View Post
Same style of launch as the LSX auto stuff. Put the car up against the brakes to build boost...yes...sitting against the brakes for 2 minutes isn't good. However..in just the 10 seconds or so you are on them waiting for the tree the motor isn't going to melt down lol. the truck should easily be cutting 1.8 short times.
So put the truck on the dyno today and after we were done I jacked the front end up and realized my idler arm, pitman arm, and control arm bushings on the driver side were shot. That may have contributed to the front end getting all out of whack on the launch. I didn't realize the pit and idler were bad because there's barely any slop in the steering at all. I'll probably do a lift pump and go through the front end and take it back to the track in the spring. Did a 1/4 on the dyno for s&g and cut a 1.5 short time lol. If only…...

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