I don't know if I'm crazy or what. I picked up my 110 P400 in the winter. Felt like the throttle response was great, got moving very well. Perhaps coincidental, but now it's warming up and I feel like I'm getting lousy torque at low RPMs. Then BAM - off to the races once throttle is half way to the floor. Also seems like I'm listening to it wind up more in low gears before shifting. It got cold again last week and it was back the regular performance I had come to appreciate. Now it's back over 70 degrees with some A/C running here and there and acting sluggish again. I've never had a turbo charged engine before (or a MHEV for that matter). Anyone else experience this? Really noticeable in low speed city driving. On the highway at speed not noticeable at all.

 

Make sure you are at the latest software version. lots of topics on this. I pretty sure one of them included an update for throttle response. And yes you also might be crazy. Also could be bad gas.

 

Well, by physics and all that, as it gets warmer performance suffers because the air temp goes up. Turbos/Superchargers try to help but as the air heats up there is some performance changes. Normal Aspirated engines LOVE the fall when it gets real cool suddenly you get more HP.

I don't remember it being as big a deal on turbos though

 

Yes thats why a bmw v8 would go nicely in it. Engine swap anyone?

 

Warmer air is less dense so you'll get less HP at higher temps (the ecm tries to compensate). The supercharger is electric so you should get that boost right off the line but then it would take a bit longer for the turbos to build pressure and kick in. That can cause a bit of a dip in the power curve.

That said, I don't really see a huge difference between 40⁰ and 90⁰ with my p400. It's there but it's slight.

This is not dissimilar to a couple previous threads here. This one discussed the air density drop at high altitude even though it was cold and I'll try to find the other.

https://landroverforums.com/forum/20...n-snow-115606/

 

just solve it like they do with the Honda civics, big ol coffee can sized air filter in the engine bay, give it even more hot air.

 

Turbos feel more peppy when the temp drops below 55-60. It’s noticeable on sports cars, yet tires are harder in cold weather and loose traction more.

I’ve always noticed less peppiness with turbos in warmer weather. The electric supercharger should help offset that some though.

You’re not crazy! : )

 

there is a science to all this. they don’t just feel more peppy but actually produce more power. cold air is more dense with oxygen generating in more power.

Turbos run hot in general and with hot air they just don’t perform well.

it’s heat soak in the summer

 

Correct, I was just putting it in layman's terms.

Peppy! : )

 

Turbos dont like heat