One benefit of start/stop feature

[Teufel_Hunden]

This is like buying an M3 and having a button to turn the exhaust off. if I wanted a quiet (or fuel economy) car, I would have bought a Tesla.

[tdott]

Also depends on where you live, here in Florida the stop lights take so long to change, which is one of the reasons I no longer daily my M3 it felt like a waste in rush hour commute.

But Auto Start/Stop in my Lexus SUV makes so much sense, starts are barely noticeable, AC compressor is electric so I can sit at lights or in traffic for several minutes without my AC getting warm in this Florida heat while I wait for lights that take forever.

So there is a place for ASS, but if my M3 had it, it wouldn't be enabled for sure. It is a useful feature in some applications.

[8500RPM]

Originally Posted by 6ixSpd

Meh, who cares as long as it helps the car pass EPA/EU fuel economy standards so it can even be produced for the street in the first place.

Worst case, you disable it and most manufacturer's even allow you to. There's no down side to this technology whatsoever.

Yeah I see what you're saying. They can start/stop those EPA test mules for ever for all I care lol. Imagine if that feature couldn't be turned off...

[jqsmooth]

I haven't used this feature all that much in the past but am using it more where I am currently(the lights are long). It becomes nice and quiet for me to hear the music while waiting for the traffic light to change. I can actually hear myself think. Kinda serene if you ask me. However, in bumper to bumper traffic like around NYC, I turn it off.

One thing I learned is that if you have your SES light on or have ghost codes regarding O2 sensors or the like, this feature doesn't work.

[BPMSport]

Originally Posted by amrazM

Incorrect, s65b40 uses the same starter start stop or not.

Actually, it didn't.

When start/stop was introduced, the starter was changed, and eventually all of them used the upgraded starter. You'll find a different starter in 08-10 models.

[6ixSpd]

Originally Posted by BPMSport

Actually, it didn't.

When start/stop was introduced, the starter was changed, and eventually all of them used the upgraded starter. You'll find a different starter in 08-10 models.

amrazM is actually correct. I too thought it had a more beefed up starter, but it's not.
http://www.realoem.com/bmw/enUS/show...diagId=12_1200

12417843526 is the starter on my LCI Auto Start-Stop equipped E92 M3. The same P/N is shared across all E9X models, LCI and Pre-LCI alike.

Edit: I take that back, you're right. 12417837775 was used up from 06/01/2007 — 12/07/2011, the life cycle of the Pre-LCI cars. It appears now (as you stated) that they use 12417843526 for all E9X M3 across the board.

[BPMSport]

Originally Posted by 6ixSpd

amrazM is actually correct. I too thought it had a more beefed up starter, but it's not.
http://www.realoem.com/bmw/enUS/show...diagId=12_1200

12417843526 is the starter on my LCI Auto Start-Stop equipped E92 M3. The same P/N is shared across all E9X models, LCI and Pre-LCI alike.

You can link a diagram all day but it doesn't mean anything. The older starters even sound different than the newer ones. The starter is a superseded part. They all receive the same starter now. This wasn't always the case.

[6ixSpd]

Yes, I made the edit right as you were posting.

RealOEM diagrams do mean plenty, as I just showed with correcting myself. So I wouldn't say they don't mean anything

[blu3wolf]

Originally Posted by 6ixSpd

Yup. Our X1 (90% city driving), both Caymans (50/50 split), all showed about 7-10% reduction in fuel consumption with it.

Obviously it depends on your driving, if you do 90% highway commuting it's not going to make any tangible impact.

Manufacturers aren't wasting resources and costs to design and install this feature in millions of cars for no reason. It works as intended.

+1

I think Engineering Explained has a video on this explaining why it will save you around 10% or so.

[Merlin_83]

..Bumpie

[6ixSpd]

Originally Posted by blu3wolf

+1

I think Engineering Explained has a video on this explaining why it will save you around 10% or so.