The best $100 I’ve spent on my Ranger Raptor = auto start stop eliminator disabler

[joordan]

When the engine shuts off, all of the oil drains back into the pan, thus the “cold start”. You do the most damage to your engine upon start-up, before the oil gets up to normal operating pressure. If they had really wanted to do it right, the auto start/stop would have been paired with an auxiliary electric oil pump. Just my $ .02

do you really think no one has thought about it?or have not learned from the early days of on/off feature that was ruining engines?nowdays even the cheapest car that has this feature has specific crankshaft and starter modification (on top of the battery) that absorb the increased number of start-up, as well as extra coolant circuits . as much oil as you wish to pump, at start-up you will never eliminate the friction between the crankshaft and the bearings cause that perfect lubrification is induced by hydrodynamic flow at speed.

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[Rabbit9]

do you really think no one has thought about it?or have not learned from the early days of on/off feature that was ruining engines?nowdays even the cheapest car that has this feature has specific crankshaft and starter modification (on top of the battery) that absorb the increased number of start-up, as well as extra coolant circuits . as much oil as you wish to pump, at start-up you will never eliminate the friction between the crankshaft and the bearings cause that perfect lubrification is induced by hydrodynamic flow at speed.

I’m sorry, but I don’t understand anything you just said / tried to say. So the modern cars are engineered to prevent wear, but you can’t prevent wear because of the increased friction of a cold start? How about trying not to drink so much before posting, ok.

 

[joordan]

I’m sorry, but I don’t understand anything you just said / tried to say. So the modern cars are engineered to prevent wear, but you can’t prevent wear because of the increased friction of a cold start? How about trying not to drink so much before posting, ok.

Not sure what is not clear, let me try to better explain…modern engines are designed to prevent wear induced by higher amount of start-up condition.
The oil pump reference was to your argument that an extra pump would have made the design right. That is wrong, cause it does not matter how much oil you pump. The wear comes out of the friction created until the crankshaft spins fast enough to create hydrodynamic film…to prevent that wear you can only redesign your crankshaft if you are to move them from full stop too frequently due to start/stop.
Turbo etc, they are all protected by added circuit (and in some cases also aux electric pump to keep oil/coolant flow)

 

[AugPal]

I think you're both right and I agree with both of you

@joordan talks about changes made so the Start/Stop feature doesn't cause abnormal wear. If you Google, changes made to prevent excessive wear due to Start/Stop, you'll find a list of changes made to prevent excessive wear due to the Start/Stop feature

@Rabbit9 talks about excessive wear due to constant cold starts. I agree, Even though changes have been made to prevent abnormal wear, a cold start is going to be tougher on an engine. I live in Chicago and it takes forever to drive out of the downtown loop due to all the stops and starts. That's hard on an engine.

 

[joordan]

I think you're both right and I agree with both of you

@joordan talks about changes made so the Start/Stop feature doesn't cause abnornal wear. If you Google, changes made to prevent excessive wear due to Start/Stop, you'll find a list of changes made to prevent excessive wear due to the Start/Stop feature

@Rabbit9 talks about excessive wear due to constant cold starts. I agree, Even though changes have been made to prevent abnormal wear, a cold start is going to be tough on an engine. I live in Chicago and it takes forever to drive out of the downtown loop due to all the stops and starts. Thats hard on an engine.

But start/stop does not intervene in cold starts. The engine needs to be at a certain minimum temperature for start/stop to kick in

 

[AugPal]

But start/stop does not intervene in cold starts. The engine needs to be at a certain minimum temperature for start/stop to kick in

I'm sure you're correct, I have a travel trailer and I also read Start/Stop turns off if you're towing. I think the confusion is over the word, "cold starts" . I think of a cold start as any time the engine is off and turned back on, whether it's warmed up or not.

Just my opinion, and like you said, there's a list of changes made to prevent abnormal wear. I Googled it and saw the list of changes

 

[Rockport]

I don’t care about the scientific reasons or the mechanical reasons.
I just don’t like the “feel” of the engine shutting off when I stop, so I spent the $100
Purely personal preference.

 

[joordan]

I don’t care about the scientific reasons or the mechanical reasons.
I just don’t like the “feel” of the engine shutting off when I stop, so I spent the $100
Purely personal preference.

I am with you on this, do not like it either. And as I wrote somewhere else, the logic on the ford truck is pretty intrusive vs the one I have on my partner’s Audi.

 

[Muffin1]

I don’t care about the scientific reasons or the mechanical reasons.
I just don’t like the “feel” of the engine shutting off when I stop, so I spent the $100
Purely personal preference.

That's it in a nutshell, one of the first mods i did

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