CAI, catback, dyno tune results (add headers &PTB?)

HogWild26 · August 14, 2019

I recently dyno tuned my 2018 6.2 SLT with a cold air inductions intake and borla touring exhaust. It made 389 RWHP and 443 RWTRQ on stock tires. From my best observation a stock 6.2 on stock tires makes around 358 RWHP and 390 RWTRQ. Anyone else agree? This would be an increase of 31hp and 53ftlbs. I was wondering what additional long tubes and a ported TB would make. Truck only has 6K on it so I would probably wait until closer to warranty exp in case something wonky defect happens low miles.

CamGTP · August 14, 2019

I don't see the ported throttle body doing anything. You are not even close to the limits that the stock throttle can flow.

The long tubes may add another 15-25hp but it all depends. It will move the power band up and take away a little bit of hp/torque down low.

If E85 is in your area, you can install a sensor and maybe gain another 15-20hp just buy running that fuel and a rework of the calibration.

HogWild26 · August 15, 2019

12 hours ago, CamGTP said:

I don't see the ported throttle body doing anything. You are not even close to the limits that the stock throttle can flow.

The long tubes may add another 15-25hp but it all depends. It will move the power band up and take away a little bit of hp/torque down low.

If E85 is in your area, you can install a sensor and maybe gain another 15-20hp just buy running that fuel and a rework of the calibration.

No E-85 here. Never seen it either around the coastal SE. I definitely want to do headers but seeing reviews of the ported TBs and you can do a turn in for $150 it seemed worth while in the least I've heard initial throttle response. My big wonder is why the factory wouldn't improve their design if its even a minimal improvement.

I actually don't really see how headers could take much away down low on these 8 speeds. The thing already pulls the doors off a barn in first or second and wants to rev between 2,500-4,000 through the gears at 30% throttle.

Denali34 · August 15, 2019

That number for a stock truck varies greatly depending on location, temp and kind of dyno. Did they not do a stock run before you added those items? I didn't pick up those kind of numbers from CAI and exhaust. Gains were minimal at best (5-8 WHP). A tune is what wakes these trucks up. I got those kind of numbers after adding long tube headers and a smaller pulley for my SC. Also, I have a ported TB on mine and it didn't give me jack but a little better throttle response. I added a Pedal Commander soon after and was the best upgrade I did until I had to remove it for the Whipple.

Jacoby · August 15, 2019

Impressive numbers to say the least. Almost unbelievable

HogWild26 · August 15, 2019

I had my tune done by a professional at National speed in Wilmington

3 hours ago, Jacoby said:

Impressive numbers to say the least. Almost unbelievable

I had my tune done at National Speed in Wilmington NC and they definitely sing their tuners praises. I agree its the high end of what I've seen without headers. It was done on stock wheels and tires at sea level on a cool December day. I'm guessing i'd be around 405 RWHP or so with headers and not much additional torque.

BeerPwningTexan · August 15, 2019

That's pretty good torque gain. I had 385rwhp and 425rwhp on same setup. I have 275/55r20 tires and 3:23 gears with my 8speed. What tires and gears do you have?

Silver18 · August 21, 2019

HogWild26, what did it cost to get a dyno run at National Speed? I live in Hubert and have been wondering about them and their tuning.

HogWild26 · September 17, 2019

On August 21, 2019 at 3:30 AM, Silver18 said:

HogWild26, what did it cost to get a dyno run at National Speed? I live in Hubert and have been wondering about them and their tuning.

I was happy with them. HP Tuners license was $200 and I think just over $500 for the dyno time.

HogWild26 · September 17, 2019

On August 15, 2019 at 6:26 PM, BeerPwningTexan said:

That's pretty good torque gain. I had 385rwhp and 425rwhp on same setup. I have 275/55r20 tires and 3:23 gears with my 8speed. What tires and gears do you have?

I have the same. Ive been meaning to post the dyno chart.

Truck Dyno.pdf

HogWild26 · September 17, 2019

Silver18 · September 17, 2019

HogWild26 thanks for the info.

14 gmcl83 · September 17, 2019

I did this with 5.3 on 93 octane on a mustang dyno that reads 20 percent low mods are cold air intake l86 intake and Tb swap 1 7/8 inch headers no cats in temps of 101 degrees my tires are 275/60/20 k02

BeerPwningTexan · September 18, 2019

I had my 6.2 Sierra retuned with E85 and ARH 1 7/8 long tube with high flow cats and a 3.5 Vibrant resonator. Sensor picked up E63% since I had 93 in tank already. Made 430 rwhp and 470rwtq on a mustang dyno.

TRKLGND · September 18, 2019

13 hours ago, BeerPwningTexan said:

I had my 6.2 Sierra retuned with E85 and ARH 1 7/8 long tube with high flow cats and a 3.5 Vibrant resonator. Sensor picked up E63% since I had 93 in tank already. Made 430 rwhp and 470rwtq on a mustang dyno.

Didn't know the 6.2 would run on E85, with the addition of the alcohol sensor and tune. Hmmmmm. Got me thinking now.

How hard is it to install the sensor? Is the wiring harness in place for it?

I ran E85 in my 5.3's and the 6.0 in my 2017 2500. A bit more power in the 5.3. The 6.0 didn't seem to gain any power but the motor definitely ran smoother.