Dynoed My Stock 5.3l

[FREAKENHYE]

I dynoed my truck, its a stock 5.3L with only 1k miles on it so it will get better as it gets to 10k when these engines really open up, and i was suprised that i hit 300hp at the wheels and 316 torque. Wow. Check out the graphs.

 

 

 

 

 

 

[Krambo]

Nice work! She must be feeling strong. Stock tune I presume? She is running a bit rich so I figured its stock tune.

 

So what kind of dyno was it? Converter locked? 3rd gear pull?

[arzinet]

Nice, but are you sure those numbers are for power and torque at the wheels? Seems more likely that those would be numbers for the engine itself.

 

If you look on the left of the chart, it says "Torque Flywheel lbft". I think they've taken your rear-wheel figures and then applied a conversion factor to them to get your engine values.

[FREAKENHYE]

Nice work! She must be feeling strong. Stock tune I presume? She is running a bit rich so I figured its stock tune.

 

So what kind of dyno was it? Converter locked? 3rd gear pull?

 

 

I know its the Dyna Pack 4000, with 3rd gear pulls, and i dont know if it was locked or not.

 

The car is completely stock. Next week im gonna go back and get a dyno after my cat back exhaust, then the same day another run after my intake install, and then as soon as i can get a cam for the AFM motor have that installed with headers, tune, with the intake manifold porting, I should see somewhere aroun 380hp and about 400tq to the wheels.

[2007silverado]

I agree these are not wheel numbers. I hate to argue or disagree with a fellow silverado owner but I have the same truck and with a tune, exhaust, and CAI I only have 282 HP and 306 TQ at the wheels. Please share what setup you were on with us. The engine from GM is dynoed at 315 HP and typical drivetrain loss is at least 20%. My numbers came from a dyna pack with a 3rd gear pull.

[FREAKENHYE]

Nice, but are you sure those numbers are for power and torque at the wheels? Seems more likely that those would be numbers for the engine itself.

 

If you look on the left of the chart, it says "Torque Flywheel lbft". I think they've taken your rear-wheel figures and then applied a conversion factor to them to get your engine values.

 

I understand what you are saying, but i wasnt the only car being dynoed that day, my friends GA whitch was supposed to make 140 to the wheels with his mods, and did exactly that and his graph has that same thing on the side. But i will make sure this weekend. Ive dynoed my cobalt with 205hp at the crank rated but actually got 210hp to the wheels, chevy is under rating its engines.

 

I totaly understand that its not possible but the Dynapack dynos are the most accurate dynos. They take of the rear wheels and mount the hubs on the dyno.

[2007silverado]

If you or anyone knows what is involved in a cam swap on these motors please let all of us know. I am interested but fear the AFM side of the engine. I know it will be disabled which is a good thing, but what all must be changed out?

[2007silverado]

Let us know what kind of 0-60 times and 1/4 mile times your truck runs. It has to be pretty fast.

[FREAKENHYE]

If you or anyone knows what is involved in a cam swap on these motors please let all of us know. I am interested but fear the AFM side of the engine. I know it will be disabled which is a good thing, but what all must be changed out?

 

AFM doesnt need to be disabled. It can be done. Been researching it for about 2 + months, and from what i know is that the cam on the AFM engines comes with 4 profiles, and its possible to have a cam and still keep the AFM. Its a matter of how high the AFM lifter will go. So that said.

[FREAKENHYE]

Let us know what kind of 0-60 times and 1/4 mile times your truck runs. It has to be pretty fast.

 

 

Caluclator says 15.5, and my friends GA runs 15.2 and im about half car behind him on the street.

[2007silverado]

ok. for comparison my truck is at 5.8 for 0-60 and 14.6 @ 97.5 mph in the 1/4. so your times should come way down after some more mileage on the motor.

[FREAKENHYE]

ok. for comparison my truck is at 5.8 for 0-60 and 14.6 @ 97.5 mph in the 1/4. so your times should come way down after some more mileage on the motor.

 

 

Whats your mods? and if your running that on stock your above the 300hp to the wheels. more like 350hp.

[2007silverado]

I have magnaflow cat back exhaust, true-flow CAI and superchips performance tune. I found my truck peaked HP at 5800 rpm so I tweaked out my tune to shift in that range and not lose the power. My torque goes to 306 at 3500 rpm and stays there the rest of the run. That is all I have done.

[FREAKENHYE]

I have magnaflow cat back exhaust, true-flow CAI and superchips performance tune. I found my truck peaked HP at 5800 rpm so I tweaked out my tune to shift in that range and not lose the power. My torque goes to 306 at 3500 rpm and stays there the rest of the run. That is all I have done.

 

 

If this is on a 5.3L then you should be in the 350hp range to get the times you said, and that would put you over 433hp at the crank.

 

Some now my numbers at the wheels sounds just about right. becuase theres no way you would get 100hp to the wheels out of a tune, Catback and CAI alone.

 

 

im telling you guys, Chevy is under rating these engines, just like everyother person i know that dynoed there cars, there claiming crank horspower at the wheels.

[2007silverado]

I put my truck on a dyna pack also. If you look up the dyno charts for the 5.3L engine from the air filter companies they only get a stock baseline of 247 HP on average. So in my numbers I only gained 35 HP with my mods which is normal. Translate that back to flywheel and it puts it in the 365 HP range. That makes the slightly modded 5.3L put out what the 6.0L does at stock. That seems like accurate true real world numbers to me. I might add ford and dodge whoopin' numbers also. My loud exhaust scares them. HAHAHAHA!!! I will admit im not a gear head im just looking at numbers.