High rev Non-stop engine - how long would it last?

mito · 01-27-2008, 02:06 PM

NEWBIE QUESTION:

Out of curiosity, how long an engine would last if you had it at max rev non-stop?

does the engine explode or something?

note: consider that the engine is properly cooled and the fuel tank is always full.

silverspoon1996 · 01-27-2008, 02:08 PM

its going to overheat and when the metal starts to break down the oil is pretty much sludge.

***blue rocket*** · 01-27-2008, 03:01 PM

i always thought they ran the engines at redline for a few hours or something while they are still in the factory.

tite681 · 01-27-2008, 03:11 PM

Quote:

Originally Posted by blue rocket

i always thought they ran the engines at redline for a few hours or something while they are still in the factory.

Yeah, I heard the same thing but I have a hard time believing it.

silverspoon1996 · 01-27-2008, 03:16 PM

RX-7 9000RPM Sustained ( Brando pop )

Thats a motor at 9k on its last legs.. they murdered it..

Slowroll90 · 01-27-2008, 03:22 PM

many diesel engines are designed to run 100% power out put when they run
this isnt very fast but they do it a lot
anyhow
car engines arent designed to handle that
race car engines dont last very long i dont believe
i remember watching espn about top fuel draggsters
anyway the mechanic said that there are certain parts replaced every race
and the engine itself as a whole is only expected to last about 5 or 6 races
thats one weekend or so i think

Tugzy · 01-27-2008, 03:26 PM

Did you watch the Rolex 24 hour series this weekend? Nuf said....

mito · 01-27-2008, 03:32 PM

Quote:

Originally Posted by silverspoon1996

RX-7 9000RPM Sustained ( Brando pop )

Thats a motor at 9k on its last legs.. they murdered it..

incredible.

questions: it's much worse to hit redline while idling than on full speed? (on the road, going up the hill, etc.)

at the end of the video they can't start the engine. did it melt? what could have happened to it (technical side)...

silverspoon1996 · 01-27-2008, 03:33 PM

enough said what??? That cars last or dont.. Like 75% that start dont get half way though... you cant beat the snot our of something for a long time and expect it to last.. I mean go as far as F1 or Nascar.. theres cars race after race after race that DNF... and those are hand built to spec.. for maximum performance.. Nothing is meant to be running at full power output for an extended period of time.. Energy produces heat.. and heat will break down the engines parts and fluids...

silverspoon1996 · 01-27-2008, 03:35 PM

when your idling the car has nothign passign through the radiator... cooling the fluid... so yes its probally worse idling then going up hill as long as the hill isnt a rediculous incline..

and the killed the seals in the motor.. no compression.. no start.. hahaha..

Slowroll90 · 01-27-2008, 03:36 PM

[quote=mito;2127857]incredible.

questions: it's much worse to hit redline while idling than on full speed? (on the road, going up the hill, etc.)

there is no load on it

da_lsvtak · 01-27-2008, 03:40 PM

^^^ this is very true. take in consideration im going a little bit out there, but i work on F-16s and im a crew chief on one. after every flight we have to take a JOAP sample which is a bottle filled with the engine oil, they take it to a shop and burn it to see how much metal break down is occuring in the motor itself. and those engines are usually run at more than 100% power in afterburner.

now take that principal to cars and what you get is friction. and i mean ALOT of friction. factory gas engines arent designed to be ran at redline for every gear on every shift. your motor would eventually decay itself to the point it collapses, hense why you see alot of dropped valves and snapped connecting rods on cars that are constantly raped.

silverspoon1996 · 01-27-2008, 03:46 PM

Most endurance engines are mildly tuned.. they balence them and use thermal coatings and other coatings to reduce friction, all this is to try to make the engine last longer... it helps but no matter what it is you push to its limits for a long time its going to break down and stop..

Asif22 · 01-27-2008, 06:05 PM

Wow I would have taken it to a track or through the woods or something and beat the piss out of the motor like driving it...try some clutchless shifting or go from like 5th to 1st, now that would be fun!

mito · 01-27-2008, 06:17 PM

Quote:

Originally Posted by silverspoon1996

and they killed the seals in the motor.. no compression.. no start.. hahaha..

from the video I could see that they stopped the engine (it was still working at 9k rpm) and turned it off. The engine wouldn't start afterwards. So if the seals were killed, shouldn't it have stopped before during redline?

datbacker59 · 01-27-2008, 06:27 PM

hope no one is "smart" enough to try on there civic

TommyD · 01-27-2008, 06:41 PM

A Honda engineer/tech once leaked that any new engines are tested before going into a production model by running at redline for 24 hours. This was on the motorcycle side, no idea on the automotive side, but wouldn't think it would be much different. And by that he didn't mean the motor in your bike, he was referring to testing newly designed engines for reliability.

mito · 01-27-2008, 06:57 PM

Quote:

Originally Posted by TommyD

A Honda engineer/tech once leaked that any new engines are tested before going into a production model by running at redline for 24 hours.

imagine the noise level and pollution...

Slowroll90 · 01-28-2008, 01:49 AM

Quote:

Originally Posted by TommyD

A Honda engineer/tech once leaked that any new engines are tested before going into a production model by running at redline for 24 hours. This was on the motorcycle side, no idea on the automotive side, but wouldn't think it would be much different. And by that he didn't mean the motor in your bike, he was referring to testing newly designed engines for reliability.

honda sportbikes have a rep for being about to take a beating and keep going

NIGHTHAWKSI · 01-28-2008, 09:30 AM

whatever you do...dont do it for 4 years...
Cruising at 7500 RPM for 4 years: How to throw a rod.

01-27-2008, 02:06 PM	#1 (permalink)
mito Senior Member Join Date: Dec 2007 Location: yyz Posts: 329 iTrader: 0 / 0%	High rev Non-stop engine - how long would it last? NEWBIE QUESTION: Out of curiosity, how long an engine would last if you had it at max rev non-stop? does the engine explode or something? note: consider that the engine is properly cooled and the fuel tank is always full.

01-27-2008, 03:01 PM	#3 (permalink)
*blue rocket* The Sticker Man Join Date: Aug 2006 Location: CT Posts: 3,166 GrafiXpressions.com iTrader: 94 / 100%	i always thought they ran the engines at redline for a few hours or something while they are still in the factory. __________________ * Steering Wheel Emblems, Console Emblems, Replacement Decals & More!!! *

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01-27-2008, 02:08 PM	#2 (permalink)
silverspoon1996 Senior Member Join Date: Jan 2008 Location: Rockland County New York Age: 27 Posts: 831 JJ iTrader: 0 / 0%	its going to overheat and when the metal starts to break down the oil is pretty much sludge.

01-27-2008, 03:16 PM	#5 (permalink)
silverspoon1996 Senior Member Join Date: Jan 2008 Location: Rockland County New York Age: 27 Posts: 831 JJ iTrader: 0 / 0%	RX-7 9000RPM Sustained ( Brando pop ) Thats a motor at 9k on its last legs.. they murdered it..

01-27-2008, 03:22 PM	#6 (permalink)
Slowroll90 Senior Member Join Date: Jun 2007 Location: Jonesboro Posts: 1,057 Aaron iTrader: 1 / 100%	many diesel engines are designed to run 100% power out put when they run this isnt very fast but they do it a lot anyhow car engines arent designed to handle that race car engines dont last very long i dont believe i remember watching espn about top fuel draggsters anyway the mechanic said that there are certain parts replaced every race and the engine itself as a whole is only expected to last about 5 or 6 races thats one weekend or so i think

01-27-2008, 03:26 PM	#7 (permalink)
Tugzy Senior Member Join Date: Dec 2007 Location: 08 TW Si Sedan & BEATING THE PI$$ OUT OF IT Posts: 181 iTrader: 0 / 0%	Did you watch the Rolex 24 hour series this weekend? Nuf said....

01-27-2008, 03:33 PM	#9 (permalink)
silverspoon1996 Senior Member Join Date: Jan 2008 Location: Rockland County New York Age: 27 Posts: 831 JJ iTrader: 0 / 0%	enough said what??? That cars last or dont.. Like 75% that start dont get half way though... you cant beat the snot our of something for a long time and expect it to last.. I mean go as far as F1 or Nascar.. theres cars race after race after race that DNF... and those are hand built to spec.. for maximum performance.. Nothing is meant to be running at full power output for an extended period of time.. Energy produces heat.. and heat will break down the engines parts and fluids...

01-27-2008, 03:35 PM	#10 (permalink)
silverspoon1996 Senior Member Join Date: Jan 2008 Location: Rockland County New York Age: 27 Posts: 831 JJ iTrader: 0 / 0%	when your idling the car has nothign passign through the radiator... cooling the fluid... so yes its probally worse idling then going up hill as long as the hill isnt a rediculous incline.. and the killed the seals in the motor.. no compression.. no start.. hahaha..

01-27-2008, 03:36 PM	#11 (permalink)
Slowroll90 Senior Member Join Date: Jun 2007 Location: Jonesboro Posts: 1,057 Aaron iTrader: 1 / 100%	[quote=mito;2127857]incredible. questions: it's much worse to hit redline while idling than on full speed? (on the road, going up the hill, etc.) there is no load on it

01-27-2008, 03:40 PM	#12 (permalink)
da_lsvtak Member Join Date: Dec 2007 Location: houston,tx Posts: 49 iTrader: 0 / 0%	^^^ this is very true. take in consideration im going a little bit out there, but i work on F-16s and im a crew chief on one. after every flight we have to take a JOAP sample which is a bottle filled with the engine oil, they take it to a shop and burn it to see how much metal break down is occuring in the motor itself. and those engines are usually run at more than 100% power in afterburner. now take that principal to cars and what you get is friction. and i mean ALOT of friction. factory gas engines arent designed to be ran at redline for every gear on every shift. your motor would eventually decay itself to the point it collapses, hense why you see alot of dropped valves and snapped connecting rods on cars that are constantly raped.

01-27-2008, 03:46 PM	#13 (permalink)
silverspoon1996 Senior Member Join Date: Jan 2008 Location: Rockland County New York Age: 27 Posts: 831 JJ iTrader: 0 / 0%	Most endurance engines are mildly tuned.. they balence them and use thermal coatings and other coatings to reduce friction, all this is to try to make the engine last longer... it helps but no matter what it is you push to its limits for a long time its going to break down and stop..

01-27-2008, 06:05 PM	#14 (permalink)
Asif22 Senior Member Join Date: Jul 2007 Location: United States Posts: 2,808 Mohamed El-Mubaslat iTrader: 0 / 0%	Wow I would have taken it to a track or through the woods or something and beat the piss out of the motor like driving it...try some clutchless shifting or go from like 5th to 1st, now that would be fun!

01-27-2008, 06:27 PM	#16 (permalink)
datbacker59 Senior Member Join Date: Aug 2006 Location: New York Age: 20 Posts: 2,276 Its a Live2Hustle Thang... iTrader: 3 / 100%	hope no one is "smart" enough to try on there civic

01-27-2008, 06:41 PM	#17 (permalink)
TommyD Senior Member Join Date: Jun 2006 Posts: 1,367 iTrader: 0 / 0%	A Honda engineer/tech once leaked that any new engines are tested before going into a production model by running at redline for 24 hours. This was on the motorcycle side, no idea on the automotive side, but wouldn't think it would be much different. And by that he didn't mean the motor in your bike, he was referring to testing newly designed engines for reliability.

01-28-2008, 09:30 AM	#20 (permalink)
NIGHTHAWKSI Senior Member Member Join Date: Nov 2006 Location: long island Age: 23 Posts: 14,735 Ian iTrader: 13 / 100%	whatever you do...dont do it for 4 years... Cruising at 7500 RPM for 4 years: How to throw a rod.