Crunk Flammable Jello Times

[ngsm13 5,000+ posts]

Not sure...

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[UndercoverPunk 5,000+ posts]

As far as effect on the engine, High RPM's are bad. Under an idling condition, I don't think the engine gives a shit what gear it's in.

I think you'd be better off @ the lower RPM, as long as the lower RPM doesn't mean lots of stop and go rather than constant speed.

 

[Acidburn 5,000+ posts]

Hey, I have a car/engineering question.
If a truck was driving on a treadmilll @ let's say 2500 rpm, does the engine do more work in 3rd gear vs. 4th gear...meaning is it harder on the engine doing 2500 rpm in a higher or lower gear.

Reason why I am asking is that there is an alternate route home that requires me to drive much slower...however the engine is at a higher rpm at the lower speed. I was wondering if this additional rpm caused more strain on the engine.

Work is defined as force * distance. A constant 2500rpm engine speed will deliver so much torque to the transmission. Due to gearing, more distance will be gained with each revolution at a higher gear than at a lower gear, and therefore, the truck with be traveling faster at the specified rpm.

BUT, assuming negligible air friction, the engine will have to apply more force to keep at 2500rpm in 4th gear as opposed to 3rd due to torque multiplications through the gears.

So really, I have no idea lol.

To your actual question, the higher rpm will cause more wear on the engine, but less torque will be necessary due to gearing.

**shrugs**

 

[ngsm13 5,000+ posts]

This isn't the time or the place for this...

Might just be sleep time...

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[Acidburn 5,000+ posts]

In conclusion, it's one of those things that's really not worth worrying about.

Pick whichever route has better scenery or more fun roads

 

[Flipx99 5,000+ posts]

As far as effect on the engine, High RPM's are bad. Under an idling condition, I don't think the engine gives a shit what gear it's in.

What got me think this was the cvt transmissions where gear ratios are more "selectable" (from my understanding)...I was thinking you could gear it so that the car be doing 80 mph and the engines RPMs are the same as if the car was idling.

But are those RPMs the same to the engine?

 

[UndercoverPunk 5,000+ posts]

I'd pick whichever route maintained the most constant speed, esp if it's in a higher gear.

MPG ftw.

 

[iceteebone 5,000+ posts]

I don't think I ever put that much thought into a route before. I generally go the way were I pass through the least black neighborhoods.

 

[UndercoverPunk 5,000+ posts]

Do you need help selecting a pump for a water circuit? I can definitely help with that.

 

[ngsm13 5,000+ posts]

Well goodnight.

nG

 

[ngsm13 5,000+ posts]

And... goodnight.

nG

 

[iceteebone 5,000+ posts]

I don't think I have seen that pic before. What would be wild is if there is a pic of a dinosaur that looks like a walking penis.

 

[DBfan187 5,000+ posts]

Do you need help selecting a pump for a water circuit? I can definitely help with that.

Do you need help selecting a pump for your pool? I can definitely help you with that.
Shaun can point you in the right direction for penis pumps though...

 

[ngsm13 5,000+ posts]

zOMG phantom donk on Discovery HD Theater...

SEMA show...

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[ngsm13 5,000+ posts]

Wow, that guy was an idiot...

nG