Cannot do burnout

[onPoint]

I have a 2005 Chevy Silverado 2500HD with an LQ4 with a sloppy stage2, VSR 7875 Billet, deka 80LB injectors and I also have a 3000RPM stall convertor in a 4l80e. It really doesnt matter what I do this thing will not do a burnout itll pretty much just hold it at 3000RPM and not doing anything while on the brakes. Ive messed with the Torque Management settings, made sure brake torque management was disabled, I really dont know what to do now. Ive done burnouts in heavy duty trucks like these and even seen others do them with just a cam or even just a tune so im doubting it being the brakes actually holding the tires. Ill attach a tune and log while trying to do a burnout, yes i know some of my TM settings are weird.


8 psi (2) On truck.hpt

Attempted burnout.hpl

My AFR is weird because I have it hooked up through my AC and forgot to unplug my AC but my AFR was good during the log.

[Alvin]

The fueling and timing look like it should be making plenty of power.

Some of these 2500 trucks with hydroboost have a ton of braking power. That with big wheels, low boost on the brake, it might just not have it.

[onPoint]

Well I have stock tires on it and it?s really hard to get it to spin the tires even at full boost and throttle, however I found a pretty big boost leak from my blow off valve. Would it maybe be because a long time I messed with the TM and maybe didn?t do write entire when I disabled brake torque management? If it were on to begin with.

[onPoint]

Or would a decent boost leak make it lack enough power to do a burnout even at 3000RPM? Feel like the answers obvious but just want another opinion

[bk2life]

Feel like the answers obvious but just want another opinion

get your truck on a dyno and get real info on what your engine is doing when and at what rpms.
other wise this is just all guessing.
Plus we dont know what your truck, wheels, engine, nothing looks like.
So it literally is just guessing. Your tune looks decent, thats about all we can see from here

[Alvin]

Fix the boost leak. Not even worth speculating what power your leak is causing. It's making boost though.

Dynoing 2500 trucks is a scary venture. My dyno has lots of scars from trucks. We since decided we aren't dynoing them any longer. The driveshafts are too long to make safe for that.

[bk2life]

The driveshafts are too long to make safe for that.

Very good thing right here..

I guess i automatically think those whom are making any type of power have already fixed that issue.
Never assume, right?
I swapped in a 2 piece unit on my silverado one i hit 400 rwhp, and that's not even much power compared to nowadays

[gametech]

Very good thing right here..

I guess i automatically think those whom are making any type of power have already fixed that issue.
Never assume, right?
I swapped in a 2 piece unit on my silverado one i hit 400 rwhp, and that's not even much power compared to nowadays

Most people I know dyno in 2nd gear when doing a truck with a 1 piece shaft. Of course if you are making a lot of power, then wheelspin becomes an issue.

[onPoint]

Thank yall for the replys! I am definitely going to fix the boost leak before I mess with anything else tune wise. Its leaking pretty bad, also I have a 2 piece drive shaft, not sure if that helps at all with them exploding and what not.