Re: Cadillac STS-V hunt
Posted: Sun Mar 01, 2020 7:46 am
https://www.cadillacforums.com/threads/ ... st-3246559
Here is what I would do if I were starting with a stock car:
http://www.cadillacforums.com/forums/ca ... grade.html heat exchanger upgrade for cooler air temps and faster recovery times. No tune changes required.
Then I'd do:
http://www.cadillacforums.com/forums/ca ... -here.html
http://www.cadillacforums.com/forums/ca ... ntake.html
http://www.cadillacforums.com/forums/ca ... odies.html
and 60lb injectors. I have new Siemens 60s for $320. I'd do all this at the same time because tuning changes are required. I provide info on what to change. You just have to find someone to flash the computer with HPtuners
Then I would do headers
http://www.cadillacforums.com/forums/ca ... aders.html The only tune change required for headers is to delete the rear O2 sensor codes. This can be done when you do the changes for the injectors, intake, etc
All these mods will put you at 450+rwhp and 440+rwtq.
My car ran 12.65 @ 115mph on all season street tires. Stock STS-Vs run low 13s at 105mph or so. That extra 10mph shows a HUGE gain in power. Better tires would take several tenths off the time too.
No check engine lights for any of these mods if the tune changes I specify are implemented. My car drives just like stock other than the power difference.
Some of us have broken axles from wheel hop. I broke mine with the turbo at the track as a result of wheel hop. That's really the only thing you have to watch out for with increased power.