Less boost in the cold
- Thread starter Haze
- Start date
Mine seems more aggressive now its cold, especially up top 5/6k. I'd say you have a leak somewhere if the psi has dropped.
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Is that based on a feeling or do you have a reading? Theoretically it makes sense for our cars to drop boost in comparison to air density to produce the same output and avoid over boosting.
Mine hasn't dropped psi gauge wise and pulls really well, no drop of either. No logs
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Turbo cars will more often than not overboost in colder weather. Thats how I blew my turbo on my old car. Boost spike.
Cold air = more dense. More air = more fuel = Bigger bang = More EG = Quicker spool.
Cold air = more dense. More air = more fuel = Bigger bang = More EG = Quicker spool.
You see from what I understand cold air does = more dense but more dense means the turbo does not need to work as hard to meet torque parameters set by the ECU thus less boost.
I have an AMD stage 1 MAP that was tuned at an ambient temperature of 24.5 degree Celsius. ln the summer I was boosting 18psi now it's below 0 degrees Celsius I'm seeing 13-15 with no apparant difference in the feel of the power delivery .
Only thing I have a loss of is traction
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Are you mapped?
The turbo will boost spike in cold air. Not all the time and it will be for a split second until the actuator opens.
Have you got a custom map or a flash map?
I wouldnt think a car mapped at 19 psi would drop to 15 psi when its cold. Thats like saying it will over boost when hot weather???
It might be worth while contacting AMD to discuss.
I will.. I'm on the understanding that the ECU sets out a torque parameter to hit, meaning less boost is needed to hit the target in freezing weather and more in hotter.
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