mud tires will cost you somthing arround 20-30whps
my friend just dyno tuned his truck.
2006 2500hd NV4500 manual trans 4x4 6.0lq4 with a littel bigger than stock tires
electric fans,cold air intake,ARH 1.7/8 headers, custom dual borla xr-1 mufflers exhaust
i remeber the numbers were more than 330whp and 350rwtq

 

Let me guess, your buddy was on a DynoJet right? Assuming only 20% loss ( with an HD 4X4 manual that's probably reality) his flywheel power is in the neighborhood of 410 hp. That's a bit much for a stock internal LQ4. Or maybe what did your buddy's truck put down stock provided he dynoed it stock?

The OP's truck still picked up 80 rwhp over a stock similar configuration truck on his same dyno so really the overall gain is quite respectable. He very well could strap to the same dyno your buddy was on and throw down 350 rwhp, but that doesn't really matter with no stock reference point.

 

I think that sounds about right. My 6.0L with a 60e and 29.5" tall tires made 333hp/351tq, with the 80e it dropped 15hp. I put the turbo on after that, then I put on the new tires(30.5")/wheels, and could feel a difference, so I could tell it lost a little more.

I know you use it, but your tires are what's making the hp numbers low, and it's probably the weight that makes it feel sluggish. You will feel a big difference with 4.56 gears, but I don't know if 4.10 would make enough difference to be worth it. If I were you I wouldn't worry about the numbers, the dyno is a tuning tool, nothing more.

 

its a dyno jet thats correct
just for refrence
my 5.3 with CAI,obx lts, magnaflow exhust 4x4 6l80e a got 300hp - 327tq
on STD 5
ill try to get the exact numbers and if i can get the dyno graph

 

the first run befor tune

281.89 rwhp and 327.88 rwtq.
311.37 rwhp and 356.75 rwtq.

he is new to the performance world he gave me the tq numbers as befor and after hp

 

And that's the way to judge from a dyno. You picked up basically 30Hp and 29 lb ft of torque from tuning for your mods. The numbers themselves are kindof meaningless on their own but the difference is what matters. Awesome gain!

 

I thought the 5.3's have 63cc compression.. I changed to higher compression heads on the 5.3 from the 63's to 60's. Made a great difference.

 

So I guess its time for me to upgrade my TB then

 

That truck should have had a 31 in tire stock , so you have lowered the effective gear ratio by going to the 32 in tire. I think you made a good choice on the converter, but I probably would have went a little lower on the duration and wider on the lobe separation to keep the powerband wider. I would definitely make a gear swap to to at least 4.10 and if you tow anything over 6000 -7000 lbs probably 4.56 like someone else mentioned.

 

I tow 10,000 -12,000 on occasion. Going to try 4.10s first. I can get them free. Evn with the 3.73s I had no trouble pulling my 8,000lb toy hauler.