RampantRooster

RampantRooster t1_j6iu5uy wrote

Generally an engine will encounter issues with reciprocating weight and getting enough fuel and air before it starts seeing issues with reaching the speed of the flame front. Racing engines have different requirements than road engines that allow different construction methods to reach higher RPM.

They can use lighter and possibly more expensive internals. This is bad for road engines because they have a lower lifetime and are more expensive to fix, but fine for racing cause they rebuild engines often. There's also more advanced valves operated pneumatically or electrically that maximize their open duration and minimize the time it takes to open or close them. Again these are more expensive to maintain, which is fine for racing but bad for road vehicles.

ELI5 summary: throwing more money at specific engine components can increase redline, but doing so is bad for regular car engines due to maintenance costs and reliability

I'm not familiar with that particular engine, but an example of a road diesel engine that has a redline above 5k RPM is the Mercedes OM606. It has dual overhead cams and pistons with a larger bore than stroke, which isn't the norm for diesels.

3

RampantRooster t1_ixg998x wrote

It's gotten stupid, and I've seen the same amounts for delivery fees.

To be honest, I'd fully believe it's just greed and the store is pocketing most, if not all, of that five bucks. But I don't know for sure, obviously.

For what it's worth, I did also make minimum wage hourly. It wasn't that sort of situation where I got less hourly because tips. 7+ years ago, me making ~$16/hour after tips and before gas and vehicle maintenance was actually pretty decent for a college student where I lived. Those 8-9 hour weekend closing shifts where I'd go home with $130 in my pocket were pretty nice.

3

RampantRooster t1_ixg3daz wrote

I can only speak from my own experience, and I worked as a driver from about May 2011 to July 2015 at Papa John's.

At the time, our delivery fee was $2, and I got $1 per delivery flat for mileage. So the answer is "partly". The boxes we used at the time had the whole "the delivery fee isn't paid out to the driver, so please tip" thing, but it wasn't 100% true. I don't know how it's changed since.

I got 100% of the tip, minus any I tipped out to the in store workers.

2

RampantRooster t1_ixff4w1 wrote

I feel like they could do a lot better than Chevy Bolts for that. Mach-e's or something. And to be honest I think it really depends on if corporate is freely allocating these cars to stores, or if they're gonna charge the stores/drivers somehow to use them. I know the Papa John's franchise I worked for wouldn't take the cars unless they were free.

0