What's wrong with 48v systems and ISGs? I guess you could even keep the engine constantly on and still enjoy the benefits - like a bulletproof starter/"alternator".

 

a lot of cars don't actually seem to be designed around the stop/start which (to me) is a big part of why people tend to get annoyed by them... the prius for instance has had a "stop/start" for its entire existence but it never becomes a problem since you don't need the engine to be running for that initial 0-5 mph

the mercedes 48V system with ISG on the 450 models is probably the best implementation of the stop/start i've encountered, but despite that ISG being able to output like 20 hp and 180 ft lbs on its own, the car won't let you (or just can't) get started on the EV power only... so you still have to rely on the software telling the ISG to start the engine up again in time before you need to use the gas pedal

 

I think what a lot of members take issue with is that the savings of including stat stop when it comes to fuel economy just out weigh the hassle of dealing with it on day to day basis. Then there is a long term repair concerns or reliability costs. When it comes to expensive cars, is start stop really gonna change one’s life for fuel expenses ? I can’t imagine how my 4.7 would be ruined with such a feature. When it comes to the Prius, I get why it was implemented.

 

My gas powered golf cart had stop/start.

It was made by Club Car.
I don't like stop and start even on a golf cart. Lol
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On start/stop your AC isn’t cold when the car is turned off. I imagine the heat wouldn’t be as warm. I would think this would also put added wear on the starter as well. At least with hybrid, the AC blows cold when the engine shuts off. Plus it doesn’t have a starter so no concern there.

 

Heat is usually fine, only needs a small fluid pump for heater core flow and many cars have them these days. Germans stuff in particular have had what's called "rest" function so in winter you can leave the car off but have the heater core pump/blower continue to run while you are in a store so you don't come back to a cold car if you are inside for only 20-30 min

 

Theres nothing wrong with them. Some manufacturers (like Mercedes) have had some teething problems with their 48V systems, but a 48V system is just a mile hybrid, and we have had hybrids running around for 20 years. These systems are actually less complex, there is no starter, no alternator, no belt driven systems.

The starter is not an ordinary starter, its designed to handle the additional use. 48V systems don't use a traditional starter anyways. Correct, the 48v systems are much much better with the engine stop start.

 

The Citroen with start/stop would rumble back to life. What was most irritating is having the engine shut off when you stop only momentarily to sort out where to go. It was most annoying in Nürnberg where both rental cars had nav systems that would send us the wrong way down one way streets or in two cases, into and through pedestrian zones where only delivery vehicles and Polizei are allowed to drive in/out. I paused to sort out the legal way to drive to my hotel. If I hadn’t disabled start/stop, it would have been a lot of cycles.

I had a coworker years ago with a 5 series and start/stop would have required the driver to disable it via on board electronics. My brother had a Panamera for a while and it also did not “remember” that he disabled it. You have to disable it every time you drive the car from a new start up if that makes sense. The fuel savings in the Panamera were probably not worth the development work on the “feature.” Bigger issue with the Panamera was that it was very oil thirsty. Porsche said it was normal/expected.

 

This is what you can't do anymore with all the new downsized garbage out, run it hard and tow regularly at mileage like this. At least I don't think so. OP hasn't reported a problem with his engine.

Will the new 3.4tt hold up like this? I really doubt it.

Like I said, 130k on my old 5.7 worries me about as much as a cloudy day. I'd be anxious with the new motor.

 

48v systems are more complex, the failures are also more expensive to repair. Lack of starter is great until the combined starter/generator disk dies and costs a trans pull and $1000 unit. I've done two now

 

You don't have any reason to say this other than your own bias against these systems. In any event, just change your oil on time...whats the big deal?

What 48v systems are old enough for you to work on them vs a warranty repair at the dealer?

 

The Mercedes ones, warranty doesn't last long for people who drive a lot. 48k miles here is not much, I also know 4 people with 48v Audis who are nearly out of warranty already, two have had the control module issue as well leading to a month of wait on parts.

I expect to see more in the coming years as is typical of systems like this, doesn't bother me at all since it's very good pay!

 

The big deal is that trucks are like tools, you're hard AF on them a lot of the time. OP changes oil 15k miles on a 230k mile truck, no trouble he's mentioned. Sounds like he works his Tundra and the 5.7 absolutely to death.

I said I liked the Ecoboost and I'd love to drive one again, I don't hate it at all. But I wouldn't buy one with 100k on it, or any turbo engine.

Long term reliability though this new stuff versus the old indestructible V8? Ehhhh...

 

They would be the very earliest MBs with the 48v system then, which as I said has teething pains.

I take care of my stuff, including my tools. I see no reason why anybody should not change their car's oil when it is time.

 

I don’t exactly look at it like that. Sure, there is an absence of a starter, alternator and belts, so it might appear less complex…but replacing a starter, alternator and belts is a pretty straightforward task. I just don’t see a 48V repair as being as simple. Tundra/Sequoia hybrid still has a starter as well as the integrated starter too,(I know they are not mild)