Has anyone put a pressure gauge in the exhaust to measure back-pressure?

For a turbo, maybe pre amd post turbo?

Pre turbo would show if the turbo turbine/exhaust housing was a restriction?
And post turbo would show if the exhuast was gettin to its limits of flow and backing up?

I cant sleep and for some reason just thought bout it.*

 

You've got it all right I haven't tested backpressure though. I just run a giant turbine and housing so as to not worry about backpressure lol. When in boost, your boost:backpressure ratio should stay pretty consistent depending on engine specs until either the compressor runs out of steam or the turbine has had all it can take. Higher the ratio the better!

 

What turbo specs you running?

 

S480 with the 96mm turbine, 1.32ar. Has about a second spool time to full boost from a 30 roll. Not the best, but manageable.

 

damn!!! thats a huge bitch! What engine?

 

Its a 6.0. Had it on the 4.8 as well...that was some lag and then some! Very little backpressure though.

 

I bet! I bet it comes on strong around 4k lol. I would love to try a s475 on my 5.3 but I havent maxed out my current setup yet so no need yet.

 

Smokeshow: at what rpm did you start seeing boost with that turbo and the 4.8?

 

Dang, thats quite A large turbo.
I dont feel so bad goin with the one im gettin.
S475 75/83 1.0AR
What stall are you running?

 

where did you get that s475 and how much? T6 flange right?