How many overrevs are too many?
#1
Intermediate
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Join Date: Dec 2015
Location: Houston TX
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How many overrevs are too many?
Hi all,
I'm in the market for a 997.1 turbo coupe MT. Looking at an '07 997.1 turbo MT at Gaudin Porsche in Las Vegas https://gaudinporschelv.com/inventor...+Black+1272523. 84.5k miles but they report the car is in great shape and they recently performed the 80k service. They ask $60k.
I summarize the overrev report as follows:
Range / # Ignitions / Operating hours
1 / 1788 / 2085.200
2 / 187 / 2085.200
3 / 55 / 277.900
4 / 3 / 277.900
5 / 0
6 / 0
Operating hours counter: 2087.400
I'm a beginner at this level of detail. Can you help me understand the significance of this information? I have elsewhere read that any stage 4 or higher overrevs is a reason to politely decline the purchase - is that a good rule of thumb?
Thanks in advance for your help. I'm learning daily on this site.
Jim
I'm in the market for a 997.1 turbo coupe MT. Looking at an '07 997.1 turbo MT at Gaudin Porsche in Las Vegas https://gaudinporschelv.com/inventor...+Black+1272523. 84.5k miles but they report the car is in great shape and they recently performed the 80k service. They ask $60k.
I summarize the overrev report as follows:
Range / # Ignitions / Operating hours
1 / 1788 / 2085.200
2 / 187 / 2085.200
3 / 55 / 277.900
4 / 3 / 277.900
5 / 0
6 / 0
Operating hours counter: 2087.400
I'm a beginner at this level of detail. Can you help me understand the significance of this information? I have elsewhere read that any stage 4 or higher overrevs is a reason to politely decline the purchase - is that a good rule of thumb?
Thanks in advance for your help. I'm learning daily on this site.
Jim
#2
Rennlist Member
That report is fine. Doubly so considering the miles - I'd say it's led a gentle life. The range 4s are ancient history (1800 hours ago) and extremely minimal.
Also, "decline anything with 4s" is too broad and Chicken Little in my opinion. There are plenty of good TTs leading healthy lives with 4/5/6s out there, and you have to take into account how long ago the revs were, too. It's just too individual - 3 range 4s from 1800 hours ago is nothing, while 1000 range 4s from 30 minutes ago may need some more consideration. I bet every car you've bought until now didn't have a rev report and you had no idea if there was a botched shift somewhere in its story.
Also, "decline anything with 4s" is too broad and Chicken Little in my opinion. There are plenty of good TTs leading healthy lives with 4/5/6s out there, and you have to take into account how long ago the revs were, too. It's just too individual - 3 range 4s from 1800 hours ago is nothing, while 1000 range 4s from 30 minutes ago may need some more consideration. I bet every car you've bought until now didn't have a rev report and you had no idea if there was a botched shift somewhere in its story.
Last edited by Skwerl; 06-20-2017 at 02:02 AM.
#3
Rennlist Member
The 3s and 4s happened long ago. Some of the 1s and 2s probably just happened on a test drive.
#5
Rennlist Member
#6
Intermediate
If you shifted from 4th to 1st, for instance, you could over rev the engine. That is true. But not the case your talking about. If you miss a shift it's going to kill the engine before it revs over the limit. In any auto, tip or PDK you can't make it go over at all. So in the case of a incorrect downshift in a manual it COULD over rev.
I can't believe the amount of concern I see many people have in regard to taking these engines to red line or the limiter. The engines can easily handle many trips to redline without damage. Many Porsches that spend a good bit of time on the track see redline frequently and they live long lives.
I can't believe the amount of concern I see many people have in regard to taking these engines to red line or the limiter. The engines can easily handle many trips to redline without damage. Many Porsches that spend a good bit of time on the track see redline frequently and they live long lives.
#7
Race Director
If you shifted from 4th to 1st, for instance, you could over rev the engine. That is true. But not the case your talking about. If you miss a shift it's going to kill the engine before it revs over the limit. In any auto, tip or PDK you can't make it go over at all. So in the case of a incorrect downshift in a manual it COULD over rev.
I can't believe the amount of concern I see many people have in regard to taking these engines to red line or the limiter. The engines can easily handle many trips to redline without damage. Many Porsches that spend a good bit of time on the track see redline frequently and they live long lives.
I can't believe the amount of concern I see many people have in regard to taking these engines to red line or the limiter. The engines can easily handle many trips to redline without damage. Many Porsches that spend a good bit of time on the track see redline frequently and they live long lives.
My advice when buying a used Porsche is to always have the engine run time and overrev counters with the counts and the time stamps of the last event read.
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#8
Are there any aftermarket warranties to look at if purchasing a car with over revs? Do they even check DME if its not a CPO car? In example, will Fidelity cover a catastrophic engine failure if you have hits in Range 5?
Looking at a car that has approx. 200 ignitions(0.5 seconds) in range 5 over 110 hours ago. Just trying to cover my bases since the dealership has been dropping the price like crazy lately.
Looking at a car that has approx. 200 ignitions(0.5 seconds) in range 5 over 110 hours ago. Just trying to cover my bases since the dealership has been dropping the price like crazy lately.
#9
Burning Brakes
Not sure you have anything to worry about after 110 hours. I think most say over 50 and you are fine. I believe if something bad was going to happen it would occur at the time of the over rev.