How does Porsche make an engine reliable at 9000 RPM????
06-25-2015, 12:14 PM
#1
Burning Brakes
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How does Porsche make an engine reliable at 9000 RPM????
Now that I am finally done with my short break in.. I am still reluctant to push the engine.. How does porsche make an engine at 9000 RPM reliable???? Most of my previous cars lived at the redline, but 9K is a different story.. How long will my engine live?? 100,000 miles (I HOPE)??
06-25-2015, 12:30 PM
#2
Drifting
Now that I am finally done with my short break in.. I am still reluctant to push the engine.. How does porsche make an engine at 9000 RPM reliable???? Most of my previous cars lived at the redline, but 9K is a different story.. How long will my engine live?? 100,000 miles (I HOPE)??
06-25-2015, 01:03 PM
#6
I feel confident the engineers have done the analysis and testing for 9000 rpm durability. Note the longer stroke RS is 200 rpm less. That said using 9000 rpm every shift for 100K miles might not work. I doubt any user does that and I never use full revs until oil is at least 150 and water 190. I want the viscosity to be appropriate and all hot clearances settled in. For example the Pistons warm much faster than the cylinders and I don't want to scuff anything.
06-25-2015, 01:15 PM
#7
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Good advice even for engines that rev only to 6k (though I would let oil get even warmer than that in most 911's - around 177F is normal operating temp for many)...
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06-25-2015, 01:41 PM
#8
Three Wheelin'
I think the answer lies in the miles and years ahead.
06-25-2015, 01:48 PM
#9
Race Director
...and low mass crank, connecting rods, pistons, and valve train. Also the use of lever operated valves is an important factor.
As others have pointed out, (almost) no one revs to 9K all the time and with anything even close to normal use, even for a GT car, this should prove to be as reliable as any other Porsche engine.
As others have pointed out, (almost) no one revs to 9K all the time and with anything even close to normal use, even for a GT car, this should prove to be as reliable as any other Porsche engine.
06-25-2015, 01:50 PM
#10
Three Wheelin'
I bounce off 9000 RPM all the time because I drive flat out! No, not really, I'm just channeling our favorite Corvette driver because, well he deserves more mocking across threads.
Seriously though, I doubt Porsche would have set that redline without reason. If they thought it was too much, they'd pull it back like they did the RS. Remember this video?
Dan (daily drove today and enjoyed every bit of the ride and hit close to 9k once)
Seriously though, I doubt Porsche would have set that redline without reason. If they thought it was too much, they'd pull it back like they did the RS. Remember this video?
Dan (daily drove today and enjoyed every bit of the ride and hit close to 9k once)
06-25-2015, 02:23 PM
#11
Burning Brakes
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06-25-2015, 02:29 PM
#12
06-25-2015, 03:24 PM
#13
Drifting
The car will do it with ease.
If there are meaningful issues prior to your warranty ending (or a trend among other owners), sell the car and move on.
If there are meaningful issues prior to your warranty ending (or a trend among other owners), sell the car and move on.
06-25-2015, 04:18 PM
#15
Go to 9.10. According to Chris the answer to your question is because they are porsche I am sure they will make the engine reliable at 9000 rpm.
458 engines have been revving to 9000 for several years and have proven rock solid so far. If ferrari can do it, porsche should be able to do it better.
