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CT5 V Blackwing Questions

Ryana1992

New Member
Joined
Mar 7, 2026
Messages
4
Location
North Carolina
V-Series Cadillac(s)?
2025 CT5 V Blackwing
Good evening all,

I wanted to get some of you all's experience on a few questions that I have. My goal is about 700hp (want it to be streetable) on 92 octane, I also do not want to lose mid range power/driveability. I've heard the dual widebands stock allow the modifications without a tune. I understand I can probably gain additional power from a tune. Here are the modification I am looking at.

Kong ported blower with a 2.18" pulley
Nick Williams 103mm TB
Brisk RR12S spark plugs
Mighty Mouse catch can
JLT intake with 4" piping
Kooks catless long tube headers 1 7/8"

Here are a few questions:

1. Will these modifications without a tune achieve 700hp peak?

2. Will these modifications without a tune reduce hp/tq in the mid range?

3. For the catch can, from my understanding the routing is the PCV/sump under the supercharger is the dirty (inlet) and the clean (outlet) connects to the throttle body. In regards to the other CCV connection to the intake, is this location also needing a catch can or is the PCV side enough? I don't fully understand how the vacuum and everything with this system works so excuse my ignorance in advance.I just dont want to gunk up the intake valves.

Thank you in advance for any assistance and help! Excited to be a new owner!
 
Last edited:

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