6.7 emissions issues? Pro-con for “upgrading “ exhaust

[Apparition]

I didn’t watch the 7.3 video, with Dodge reporting 1075 on the Cummins , maybe Ford will advertise actual PowerStroke numbers.

The articles are easier to get numbers from


Here are the 2020 7.3-liter results after three consecutive runs, once again measured at the WHEELS.

356.3 whp, 360.5 whp, 358.0 whp => average 358.3 whp

409.0 lb-ft, 406.6 lb-ft, 406.3 lb-ft => average 407.3 lb-ft of torque.

If you look at the dyno power graphs, you can see that the 7.3-liter V8 make a lot more torque that the smaller gas engine between 2,250 – 4,000 rpm. This is precisely where the torque and power are really needed in a heavy duty truck.

The big 7.3-liter gasser make about 23.1 horsepower more than the 6.2-liter at the top end. It also makes 37.8 lb-ft of torque more.

The 7.3-liter wheel power numbers look good, but they are not mind-blowing. It’s good to see very good torque numbers from this engine. What does it mean for the estimated power at the crank? It’s safe to estimate a 20% drivetrain power loss for a heavy duty pickup truck, although we do not know the precise losses.

If you add 20% to the 7.3-liter wheel power numbers, the estimated power output at the crank comes to 430 horsepower and 488.8 lb-ft of torque. This is very close to what Ford specifies as the factory rating at the crank. This new big gasser is approaching the 500 lb-ft torque mark.”

2020 Ford F-250 7.3L Gas V8 versus Dyno! This is Exactly How Much Power & Torque It Produces! (Video) - The Fast Lane Truck

The new 2020 Ford F-250 7.3L Gas V8 versus Dyno! This is Exactly How Much Power & Torque It Produces in a Tremor truck! (Video)

tfltruck.com

The new 2020 6.7-liter diesel is rated at 475 hpand 1,050 lb-ft of torque at the crank by the factory. This represent an approximate 5.2% horsepower and 11% torque improvement.

The guys at 5 Star purchased a 2020 F-250 crew cab 4×4 STX. They put it on the same dyno as the 2019 truck just about 30 minutes later. The dyno load/resistance is once again set at 30%.

They are running the new 2020 diesel in 7th gear:

3.31 rear axle ratio * 1.00 (7th gear ratio) = 3.31 ratio @ 95 MPH.

Here are the 2020 results after three consecutive runs, once again measured at the WHEELS.

474.0 whp, 469.2 whp, 465.8 whp => average 469.6 whp

980.5 lb-ft, 971.9 lb-ft, 966.5 lb-ft => average 972.9 lb-ft of torque.

This represents an improvement of 59.1 horsepower and 71.9 lb-ft of torque at the wheels over the old diesel. This is an approximate 12.5% horsepower and 7.4% torque improvement at the wheels.

That’s good, but what does it mean for the estimated power at the crank? It’s safe to estimate a 20% drivetrain power loss for a heavy duty pickup truck, although we do not know the precise losses.

If you add 20% to the 2020 diesel wheel power numbers, the estimated power output at the crank comes to 563 horsepower and 1,167 lb-ft of torque.

2020 Ford F-250 Super Duty Diesel is Making Crazy Power! Old vs New Dyno Comparison (Video) - The Fast Lane Truck

2020 Ford F-250 Super Duty Diesel V8 is Making Crazy Big Power! Watch the Old vs New Diesels Compared on the same Dyno (Video)

tfltruckprod.wpengine.com

 

[Accuracy International]

I just put 1100 miles on my truck in some of the highest altitude, truck is incredible.

I never considered gas, but definitely glad to see so many happy (passionate) owners, engine options are great with Super Duty line.

 

[Accuracy International]

The articles are easier to get numbers from


Here are the 2020 7.3-liter results after three consecutive runs, once again measured at the WHEELS.

356.3 whp, 360.5 whp, 358.0 whp => average 358.3 whp

409.0 lb-ft, 406.6 lb-ft, 406.3 lb-ft => average 407.3 lb-ft of torque.

If you look at the dyno power graphs, you can see that the 7.3-liter V8 make a lot more torque that the smaller gas engine between 2,250 – 4,000 rpm. This is precisely where the torque and power are really needed in a heavy duty truck.

The big 7.3-liter gasser make about 23.1 horsepower more than the 6.2-liter at the top end. It also makes 37.8 lb-ft of torque more.

The 7.3-liter wheel power numbers look good, but they are not mind-blowing. It’s good to see very good torque numbers from this engine. What does it mean for the estimated power at the crank? It’s safe to estimate a 20% drivetrain power loss for a heavy duty pickup truck, although we do not know the precise losses.

If you add 20% to the 7.3-liter wheel power numbers, the estimated power output at the crank comes to 430 horsepower and 488.8 lb-ft of torque. This is very close to what Ford specifies as the factory rating at the crank. This new big gasser is approaching the 500 lb-ft torque mark.”

2020 Ford F-250 7.3L Gas V8 versus Dyno! This is Exactly How Much Power & Torque It Produces! (Video) - The Fast Lane Truck

The new 2020 Ford F-250 7.3L Gas V8 versus Dyno! This is Exactly How Much Power & Torque It Produces in a Tremor truck! (Video)

tfltruck.com

The new 2020 6.7-liter diesel is rated at 475 hpand 1,050 lb-ft of torque at the crank by the factory. This represent an approximate 5.2% horsepower and 11% torque improvement.

The guys at 5 Star purchased a 2020 F-250 crew cab 4×4 STX. They put it on the same dyno as the 2019 truck just about 30 minutes later. The dyno load/resistance is once again set at 30%.

They are running the new 2020 diesel in 7th gear:

3.31 rear axle ratio * 1.00 (7th gear ratio) = 3.31 ratio @ 95 MPH.

Here are the 2020 results after three consecutive runs, once again measured at the WHEELS.

474.0 whp, 469.2 whp, 465.8 whp => average 469.6 whp

980.5 lb-ft, 971.9 lb-ft, 966.5 lb-ft => average 972.9 lb-ft of torque.

This represents an improvement of 59.1 horsepower and 71.9 lb-ft of torque at the wheels over the old diesel. This is an approximate 12.5% horsepower and 7.4% torque improvement at the wheels.

That’s good, but what does it mean for the estimated power at the crank? It’s safe to estimate a 20% drivetrain power loss for a heavy duty pickup truck, although we do not know the precise losses.

If you add 20% to the 2020 diesel wheel power numbers, the estimated power output at the crank comes to 563 horsepower and 1,167 lb-ft of torque.

2020 Ford F-250 Super Duty Diesel is Making Crazy Power! Old vs New Dyno Comparison (Video) - The Fast Lane Truck

2020 Ford F-250 Super Duty Diesel V8 is Making Crazy Big Power! Watch the Old vs New Diesels Compared on the same Dyno (Video)

tfltruckprod.wpengine.com

Comparing these numbers to the screen shot I posted above, it's almost spot on from two different dyno's. That's impressive and an accurate depiction from a sample of at least 3 PowerStrokes. Very neat.

 

[Apparition]

Comparing these numbers to the screen shot I posted above, it's almost spot on from two different dyno's. That's impressive and an accurate depiction from a sample of at least 3 PowerStrokes. Very neat.

So I was looking at the numbers again. I believe that TFL calculated their crank numbers wrong. And by wrong I mean low.

They did the old multiply by 1.2 to add 20% but if you do that and multiply the crank by .8 (80%) you'll get low numbers.

Example 469.6 x 1.2 = 563.52 Therefore 563.52 x 0.8 = 450.816 (wrong number)

They should be dividing by 0.8 in order to get the crank numbers.

The numbers I get for the 6.7 are 587 HP and 1216 lb-ft

469.6 / 0.8 = 587
972.9 / 0.8 = 1216.125

For the 7.3 I get 447.9 HP and 509 lb-ft

358.3 / 0.8 = 447.875
407.3 / 0.8 = 509.125

Proof of work for 20% loss, gets me back to TFL's dyno numbers
587 x 0.8 = 469.6
1216.125 x 0.8 = 972.9

447.875 x 0.8 = 358.3
509.125 x 0.8 = 407.3