[Terry335]

I don't have a boost gauge so I'm hoping someone who has one can verify my suspicion. It seems when the engine is cold (that super-thick oil takes forever to heat up, sometimes 10 minutes or more), the car is slower than normal. As if the PCM is dramatically limiting the boost. Can anyone verify this?

Thanks,
T

[Corey]

Theoretically the car should be faster as the colder the air is for a given volume, the more dense it is. Does it remain sluggish even after completely warming up?

[roller84]

Originally Posted by Corey

Theoretically the car should be faster as the colder the air is for a given volume, the more dense it is. Does it remain sluggish even after completely warming up?

I think the ECU retards the boost until the engine warms up.

[jonm42]

Originally Posted by roller84

I think the ECU retards the boost until the engine warms up.

Thats my understanding as well.

[RiXst3r]

My boost is definatly retarded until the engine is warm... the car seems to "come alive" after it warms up a bit... when its cold, its all sluggish feeling... like there is no torque

[bronco]

and it should be like that

[Terry335]

Yeah, that is what I notice too. So, what is the point where it's considered to be warn? 210 degrees? Or does it run off oil temp?

[RiXst3r]

mine seems to come alive at about 170F on the oil temp gauge.. which on short trips (5 miles or less) I dont even get close to getting that warm... although I am finding out that compared to others 335's, my car seems to run really cool...

[roller84]

Originally Posted by Terry Burger

Yeah, that is what I notice too. So, what is the point where it's considered to be warn? 210 degrees? Or does it run off oil temp?

Most seem to think in the high 100's(like 180 or so), don't quote me on that though. BTW, on 335i the temp gauge relfects the oil temp.

[hotrod182]

It is so interesting how I can run moderately hard in the 335i and hit 260-270F oil temp, whereas the M3 can be driven really hard and only hits around 210F in the same ambient conditions.

[jam0321]

this is due to the fact that the oil is cycling through the turbines which are spinning anywhere from10,000 to 100,000 rpm! The oil is smokin hot coming from the turbos. Another reason why turbo timers are not just a rice thing...

[Terry335]

Another question for those of you with the PROcede: What kind of boost do you make when your oil is cold? Does the PROcede "bypass" that system?

[sdiver68]

Originally Posted by hotrod182

It is so interesting how I can run moderately hard in the 335i and hit 260-270F oil temp, whereas the M3 can be driven really hard and only hits around 210F in the same ambient conditions.

The 335i has a staged cooling system for better fuel efficiency.

[mesier1111]

Originally Posted by Corey

Theoretically the car should be faster as the colder the air is for a given volume, the more dense it is. Does it remain sluggish even after completely warming up?

Yes, but only to a point, the air quality and the engine's ability to process it can be affected by really cold weather. I don't know for sure, but I was told that the best temps for running a car is at sea level between 55 or 58 degree and 75 degrees and NO HUMIDITY.

[mesier1111]

Originally Posted by hotrod182

It is so interesting how I can run moderately hard in the 335i and hit 260-270F oil temp, whereas the M3 can be driven really hard and only hits around 210F in the same ambient conditions.

The turbo and lean mixture that the 335 runs on causes that. Plus, the M3 is really a "race" engine at heart, the entire engine is meant to dissipate heat, hence why M3s have been known to stall in cold weather right after you have started them.

BTW: On highway driving at 75mph, it takes my 335i coupe at least 10 miles, till it reaches its normal operting temp of around 200. So mine runs pretty cool as well, which is a good thing for when the spring and summer months come.

[Terry335]

335i oil temp runs higher because of oil heat-soak from the turbos.

Anyway my second question stands, how much boost are the PROcede cars making when the oil is < 170 degrees?