Chevy Cowboy

iTrader: (5)

Got a kb intercooled turbo installed on the sierra in my sig, shes being dyno tuned as we speak, so far she only put down 390 rwhp and 420 lb ft of torque, i was exspecting high 400 hp and tq at this point on 10lbs, is that exspecting to much out of a 6 speed 5.3 4x4 with 3:42 gears?

foose04

iTrader: (3)

What type of dyno? What gear you doing pulls in?

gamble686

iTrader: (3)

On a stock 5.3 that is pretty solid. If you throw a cam at it or a bigger motor that is a different story. Also considering the leveling kit you are probably on taller than stock tires. Which doesn't help.

Chevy Cowboy

iTrader: (5)

It is a bone stock 5.3, hes doing the pulls in third gear, hes going to do some more tuning in fourth tomorrow. Truck is leveled but still on the stock 275/65/17s. I honestly have no idea what kind of dyno hes using

Gadgetized

iTrader: (9)

I would think it should be higher for 10 PSI. Does your tuner feel that it is close to being finished? Maybe timing is real low yet.

Chevy Cowboy

iTrader: (5)

Thought it seemed low for 10 psi aswell. Im not sure how much more he thinks he can squeeze out of it, whats a typical power for a 5.3 turbo? I know he had to screw with thr afr alot because of the maf being rught at the throttle body after the 90* bend

Gadgetized

iTrader: (9)

Plus the DA is pretty bad today in most places in Canada I checked. Do you know what the AFR and timing are at?

Chevy Cowboy

iTrader: (5)

Yes it was definitely humid today, i cant say i know what the afr and timing were at, ill have to check with him tomorrow and then ill post back

Chevy Cowboy

iTrader: (5)

It wouldnt have to do with the maf sensor being after a 90 degree bend and my tuner having trouble getting the afr right because of it?

slow67

iTrader: (2)

It sounds reasonable to me if its a mustang dyno and a stock truck cam/valvesprings.