Oct
On the dyno today we are running the BorgWarner S369SXE turbo, .91 non-wastegated t4 housing. In the past, we have run this turbo with the .80 t3 wastegated housing and we’re excited to see how these two tests will compare. These tests will be run the same as the others with an unloaded test from 1,300 to 3,200 rpm, and a test loaded with about 5,500 lbs. from 1,800 to 2,800 rpm.
Test 1: Unloaded Test from 1300 – 3200 RPM
Peak power from the first test seems to be about 634rwhp at about 2,800rpm. Peak torque is around 1,286-ish. We compared this run to the same run with the .80 wastegated housing to see if we picked up any spool, etc.
Looking at power, the .80 wastegated turbo comes on a lot faster and has higher peak torque. The .91 non-wastegated turbo, however, carries the power and the torque a lot better and doesn’t fall as fast as the .80 housing.
Test 2: 5,500lb Loaded Run
In the second test we were looking at how long it takes to reach peak torque. For the .91 housing, it takes about 9 seconds to reach peak torque. You’re definitely going to want to have more than 1,800 rpm to get this thing going. That is a lot of lag.
Compared to the .80 (.80 in green, the .91 in red), there is a big difference by time. The .80 gets to peak torque in about 6 seconds. The numbers are not terribly different, but the .80 comes on about 3 seconds faster.
If we carry the window out past 3,200 rpm, perhaps the .91 would win. However, I don’t know that this is a great test for this turbo setup. The truck is tuned for a different turbo, and I think it is holding back the S369SXE turbo. We will bump up the timing and see how that helps the power. Stay tuned for future tests. Subscribe to your YouTube channel or sign up for our newsletter for the latest tests and updates.