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Ruba
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PostSubject: Endurance Engine Lifetime   Sat 15 May - 9:35

Hi everyone!

Has anyone already driven a 6-hour race, for example?
I usually had approx 2 hours, not more, that is why i don't know if engines have enough engine resource (lifetime) for a 6-hour race. What should be mentioned for such longer races? As far as i can understand, i should be careful with 4 things:
- boost 1
- limit revs by 200-300 rpms from max
- careful at shifting?
- big enough radiator to avoid overheating

Anything else?
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vevex
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PostSubject: Re: Endurance Engine Lifetime   Sat 15 May - 10:04

It's recommanded to cut the engine during the pit stop :lol4:
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KKS
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PostSubject: Re: Endurance Engine Lifetime   Mon 17 May - 23:34

Hello, I have mb same question but I need more info about RPM

For example I watch to 997RSR engine file and see this key values:
Quote :
LifetimeEngineRPM=(8700.0, 75.0)
LifetimeOilTemp=(110.0, 1.0)
LifetimeAvg=93600 // average lifetime in seconds
LifetimeVar=14400
And how quickly LifetimeAvg will be lifetime decrease if rpm is:
1. RPM=2132 (default RPM)
2. RPM=8000
3. PRM=8750
4. PRM=8800
Just for test: Oil temp=const=100 and boost=1

Second question is about boost. How boost level affect to life time? Explanation in example it's will be very nice. :)

And finaly if you have a time for this, could you create a table with values for multiplier to oil and rpm? For example like this http://spreadsheets.google.com/pub?key=teRCrVKdTd_VZ13QXKh8jWg&output=html
For x1 I mean 1 second in game cut 1 point from LifetimeAvg+/-LifetimeVar value

And maybe 8625-8700 have a x0.5 ? or?
Anyway I will be very glad to hear the answer to any of the questions. Thanks :pilote:
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MaD_King
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PostSubject: Re: Endurance Engine Lifetime   Tue 18 May - 10:08

When you add boost, there is more torque and more rpm added.
This increase the consumption of the car and if the RPM lead to pass over the 8775 you wear your engine and the oil temp increase too.
If the oil temperature pass over the 110, you wear your engine.

And the LifetimeVar=14400 is a random value managed by rFactor that's impact the wear of the engine without any calculation possible of the results of this (it will be 0 or 1000 or 14400 removed from the 93600 seconds of time life of the engine).

There is no formula to find the exact point of failure, it's linked to you downshift too, if you pass the RPM limit too often, you can break the engine.
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klo-che
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PostSubject: Re: Endurance Engine Lifetime   Wed 19 May - 10:06

thread moved in the correct section.

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KKS
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PostSubject: Re: Endurance Engine Lifetime   Mon 24 May - 22:37

MaD_King, so if oil temp is 111 deg. I wear my engine. And if temperature is 112 or 115 deg. wear will be same or it's will be higher then must be at 111 deg.

Same with RPM too?

I not blown my engine if I:
1. Downshift nicely
2. Keep my RPM lower the 8700
3. Keep engine oil temp lower then 110

If I kept all this things I may drive Porsche 997RSR 24/7 and engine never blown?
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Pandamasque
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PostSubject: Re: Endurance Engine Lifetime   Tue 25 May - 1:55

Just to confuse you even more I made a simple test. I changed the engine.ini values to:

Code:
LifetimeAvg=1  // average lifetime in seconds
LifetimeVar=0

A human driver (myself) is able to drive a few laps with this. It once died after almost 1 lap, the next time it did more than 2 laps at normal racing speed and didn't fail.
Then I tried using 'AI Control toggle' and it always died after just ~1 second, even before it reached the pit exit. :banane:


Last edited by Pandamasque on Sun 16 Jan - 23:06; edited 1 time in total
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MaD_King
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PostSubject: Re: Endurance Engine Lifetime   Tue 25 May - 10:10

KKS wrote:
MaD_King, so if oil temp is 111 deg. I wear my engine. And if temperature is 112 or 115 deg. wear will be same or it's will be higher then must be at 111 deg.
It will be higher

KKS wrote:

Same with RPM too?
Same

KKS wrote:

I not blown my engine if I:
1. Downshift nicely
2. Keep my RPM lower the 8700
3. Keep engine oil temp lower then 110

If I kept all this things I may drive Porsche 997RSR 24/7 and engine never blown?
Yes but there is the variance of the LifetimeVar that's is random taken by rFactor to generate default in engines.
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KKS
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PostSubject: Re: Endurance Engine Lifetime   Sun 16 Jan - 22:54

Come back to problem...

Can u tell me when engine blown with this values? If i keep 1400 RPM always and 80 engine temp?
LifetimeEngineRPM=(1400.00,50.0)
LifetimeOilTemp=(80.0,1.0)
LifetimeAvg=20 // average lifetime in seconds
LifetimeVar=0

I calculate - it's must be 20.000 sec. And it is.
But can you tell me how much it will be with RPM's 1450? 1500? 1600? 1400? 1350?

All my calculates at that values are wrong.

Simple as I can add that... if RPM's are 1400-50 Engine blown at 0.667*20=13.34 sec, and if 1400+50 - 1.334*20=26.68 sec... but 0.667 isn't half.
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MaD_King
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PostSubject: Re: Endurance Engine Lifetime   Mon 17 Jan - 9:47

What is the Oil temperature when you drive, this is the major element to compare.
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PostSubject: Re: Endurance Engine Lifetime   Today at 13:08

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