6nz on short steep grades

If I could figure out how to post a picture of my setup, I would......but technology isn’t working in my favor here

 

Go to your profile and go to media. Click on upload pics. Click on the ones you want them after it's finished loading click save. Then click on the pic and scroll down highlight the text click copy and paste to your reply

 

Managed to figure it out. These pictures are with a different cartridge and compressor than what I’m running now, but the exhaust housing is variable from a 0.6 a/r up to a 1.70 a/r when the drive pressure reaches 40 psi.

 

You have a probe behind pyrometer, and another on the other side of the exhaust housing. Where do they go? Is one for drive pressure, and one for pre turbo egt?

Also, it is interesting that the actuator for the vgt mechanism is plumbed to the hot side rather than the boost side. Interesting set up.

 

I run 3 probes for exhaust temp. Two before the turbine and the factory gauge behind the turbine. The factory gauge isn’t all that accurate though. The two in the manifold are aircraft pyrometers and accurate to within 0.5% all the way up to 2300 degrees. The stator vanes are controlled off of the drive pressure on the hot side. It runs a little on the negative side for the first 5 lbs or so, but then the drive pressure is always lower than the boost pressure until you start to overrun the turbo. It’s a pretty slick setup. Can’t speak to the reliability of it yet. Only been on for 3 weeks. Gonna put one on my Cat this week too and see if the results are the same as the Detroit. Definitely makes a difference on the torque curve of the engine.