Here are some real world numbers from a car I built a few years ago.
Engine Details:
2002 LQ4
Stock untouched 317s with dual valve springs
XR281HR, 228/230, .571"/.573" - 112 LSA
Hardened pushrods
LS6 intake with stock truck cable TB
LS6 injectors
0411 PCM tuned Open Loop, Speed Density by me
1-3/4" longtubes
Other Details of the car:
3" true dual exhaust
4L80E with a 3400 stall
3.42 gear, 8.5" 10-bolt Grand National Axle
This combo made 409 rwhp on the motor, and 536 rwhp on the jug. It has been stone reliable, even with about 30 bottles of dope run thru it.
https://www.youtube.com/watch?v=5YLgLyPRh3w
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1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq
1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift
1964 Buick Skylark Twin TURBO 383 LS pro-touring project
2014 VW Passat TDI - Daily Driver
Turbo diesel
2015 Sierra Denali HD Duramax Turbo diesel
2016 Ford Explorer Sport - Twin Turbskis
2017 Polaris RZR Turbo
2014 Nor-Tech Center Console - Twin Supercharged Outboards
TURBO ALL THE THINGS!!