Freakenhye

I dynoed 300hp 316tq stock on my 07 nnbs 5.3L.

Spoolin

iTrader: (8)

Hmmm...
Stock they make 247 rwhp, not bad but should be a little higher maybe.

Denali Dude

Im going for the same mods as you after I instll everything Im gonna dyno and we will see then if everything is correct
im gonna do a before and after dyno

Hollis1

I had my truck tuned by Synergy Motorsports last week. Before tune, my truck had 286 RWHP. After tune, my truck put out 316 rwhp. A nice increase of 30 rwhp; the only other engine mods are CAI and magnaflow cat back system. I'll try and copy the dyno sheet.

Lifted03Chevy

How are these 5.3s putting out 370hp at the fly with only a few small mods and a tune?

Dyno sheets?

GMCtrk

iTrader: (27)

That's what I'm wondering. These 5.3s stock are putting down more than my 6.0

circusboy

iTrader: (2)

mine made 355/325 thru a closed cutout and TT3000 stall.



I haven't dynoed since the new stall, but have a dyno day coming soon.

scooter k

iTrader: (22)

You guys must all have 2wd models or my is weak on power??? My 4wd stock
put down 255rwhp and 250 rwtq. I'm going back to see what it will do with the mods I did. The dyno that I went to is very accurate so I believe these numbers are true.

circusboy

iTrader: (2)

I'm going back soon as well

norris_83

iTrader: (4)

yeah those are crazy numbers for stock.....thats wat a 6.0 should be putting out for stock...

I dynoed 313HP and 328TQ.

Mods:

Stock 3.73s
20" Rims - 285/50/20 tires
Comp Cams XR265H14 (212/218 .522/.529 114LSA)
AFE Torque Tube
K&N Panel filter
Pacesetter L/Ts