Unsure on exact JB4 gains, but I’ve attached a photo of our average gains on EcuTek with modifications as follows.What are the estimated HP and Torque gains over stock with;
1) Just a JB4 on map 2
2 Non catted downpipe and JB4 on Map 3 and map 4?
Both with 93 octane fuel.
I didn’t realize stock boost is only 12 psi.Unsure on exact JB4 gains, but I’ve attached a photo of our average gains on EcuTek with modifications as follows.
Feel free to reach out if you have any questions. Happy to help. Contact info is in my signature.
![]()
It’s just more what we offer as a “stage 2” package.I didn’t realize stock boost is only 12 psi.
What if you run stage 2 tune with a stock dp? It will just have lower hp and richer a/f?
It is actually highly variable. The car looks for a torque target and will adjust airflow depending on he environment to get hte power. So if its warm out and the timing is pulled back it would need aditional airflow to produce the same power level. Or if you were at a high elevation it would increase air flow. The car also runs in aboslute air pressure for its calculations so in Denver the absolute pressure of 2Bar is much different than Los Angeles.I didn’t realize stock boost is only 12 psi.
What if you run stage 2 tune with a stock dp? It will just have lower hp and richer a/f?