U could've got use to it
Tune could be less aggressive at 15 psi
Etc etc.

I'm patiently waiting 50 degree weather. I was tuned at 100 lol

 

Sounds like a fueling issue. Have you compared your air:fuel with colder and warmer temperatures?

 

Car does feel like it's bogging down sometimes. My injector duty cycle was close to 100% at 15 psi. I did a fuel relay mode afterwards to fix the fuel voltage drop off on my setup. The cooler air could be causing my car to run lean, but my a/f ratio is good I think. It stays around 11- 11.5 under wot.

 

I'm gonna do a few pulls again just to check the a/f. I know my car misfired once when it was cold. Maybe I leaned out?

 

If you feel the rear-end scooting around at 100+(high speed) its very very noticeable. You almost shit your pants its that scary.
-Chris

 

Update, now the the temperatures dropped down even lower, my car is having hesitation issues at higher rpm in boost. It almost feels ignition related. I'm gonna try to change the spark plugs out. Maybe I'm having spark blow out due to the extra cold dense air?

 

Just FYI before I was tuned, as I would Lean Out which was more often as the weather was getting colder I would feel the power drop more and more. Literally the car would feel like its NA if not worse. It got to the point where I would hit 14.3+ AFR during spikes and the car would lose all the power.

To confirm that I was losing power I DYNOd it at Kaizen Tuning, that was confirmed, I lost 80hp as AFR would hit 14.3+ and the tuner would have to let go of the gas. This was all due to Comptech Rising Fuel Pressure Regulator and Injectors probably.

At this point I decided to ditch that 1/2 ass method and go with Emanage Ultimate, 600cc Injectors and a tune. Make constant power and she runs freaking awesome with 11.9>12.4 AFR

*Knock on wood.*



Edit: AAAh okay so your AFR is fine