What is the most powerful 6.0 Powerstroke using a VGT turbo? How does nitrous affect VGT applications and what type of numbers can you expect?
We wanted to better understand where the real limits are with small injectors, nitrous, and a VGT turbo. Starting from a fuel only baseline, we stepped up jet sizes one by one to see the effects of nitrous on 205/75s and our S3r Dual Ball Bearing Turbo.
For these tests, we are running a 2006 F250 6.0 with 205/75 Warren Diesel Injectors, KC S3r Ball Bearing Turbo, KDD Icon Heads, KDD S2 Cam, and Callies Rods.
We didn't start out with a full bottle so the smaller jets would likely net more horsepower at full pressure. Nitrous started spraying at 3200rpm to simulate the ghetto fog we had done in previous weeks.
On fuel only, we made a baseline of 730whp and 1293 torque. This is the red line on the dyno graph. Increasing nozzle size from here, these are the numbers we came out to.
- Light blue -.052 763hp and 1292tq
- Green - .082 802hp and 1296tq
- Yellow -.110 low bottle down to 500psi bottle 841hp and 1311tq
- Dark blue - .110 fresh bottle up to 1000psi bottle 933hp and 1432tq
- Brown - 2 x .110 1043hp and 1576tq
- Light green - .375 + .110 1299hp and 1983tq
You can only squeeze out so much power out of fuel alone because you can't drive the turbo any harder to add more air. You will reach a wall and can't seem to get any leaner. But you can add WAY more nitrous than most people think.
We stopped seeing smoke around the time we were spraying the .110 jet at 800-900hp and still added almost 400hp after that!
Every jet size we increased actually raised EGTs until we got to 2x .110 solenoids and then we started seeing a drop in EGTs
Something else super cool is that the VGT turbo ate up the nitrous and loved it! I don't think people realize how cool it is to have vanes working like a built-in electronic wastegate. The s3r making 1299hp makes less EBP than a Borg Warner S369/73/.91 on fuel only making 780whp
The S3r with all the spray was made 70psi of EBP at 3900rpms, 1299whp
The S369 on fuel only made 85psi of EBP at 3900rpm, 780whp
Bottle pressure is also SUPER important. For a test, we did two back to back runs when the bottle got low. 2x .110 jets at 500psi made the same power as 1 single .110 jet at 1000psi.
Another question we have seen asked is putting a .136 jet on a .110 solenoid. This has no gains from what we saw.
I also don't recommend just blasting all the nitrous in at once to prevent big torque spikes. But we were trying to recreate the ghetto fog on 205/100s from a few weeks ago with Josh from Powerstroke Central. Those torque spikes are hard on parts and traction.
Were pretty sure this sets the "205cc microrecord" and "highest 6.0 vgt record"
These were quick hits on the dyno and we did not have an AFR gauge. We tried to back up our data at the track with the 1043hp with 2x .110 jets and melted down the motor but matched the 1043whp track numbers pretty closely.
Even though EGTs started going down, it still started melting parts. I would try to stay under 28:1 for AFR if you are pushing the nitrous hard.
If you would like to learn more about nitrous, I recommend checking out this video:
https://youtu.be/nwzBNe7C6Xk?si=0mJMQ0L05QyAsIdY