Ignition rev 6 and Kaboom?
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AutoX
Joined: Jan 2014
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Ignition rev 6 and Kaboom?
I have viewed a 2005 997 C2s MT with the following records
ignition rev 1 640/1663h
ignition rev 2 63/1663h
ignition rev 3 4/1663h
ignition rev 4 4/1663h
ignition rev 5 3/1663h
ignition rev 6 2/1663h
Total engine operating hr counter = 1674h
I desperately need some advice as to if this car is safe to own for many years if I do not plan to over 7000rpm at all. Will the records in rev 5 & 6 = a walk a way from the buy situtation?
Many thanks for your kind assistance.
James
ignition rev 1 640/1663h
ignition rev 2 63/1663h
ignition rev 3 4/1663h
ignition rev 4 4/1663h
ignition rev 5 3/1663h
ignition rev 6 2/1663h
Total engine operating hr counter = 1674h
I desperately need some advice as to if this car is safe to own for many years if I do not plan to over 7000rpm at all. Will the records in rev 5 & 6 = a walk a way from the buy situtation? Many thanks for your kind assistance.
James
RL Community Team
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From: Atlanta
I would pass for two reasons: 1) there are better cars out there, 2) the bad shift occurred recently.... no time on the engine to really know if there is damage.
Regarding my opinion on 2 above, I acknowledge that is just emotional as I don;t have the knowledge to fully understand the implication of this. But number 1 trumps all.
Peace
Bruce in Philly
Regarding my opinion on 2 above, I acknowledge that is just emotional as I don;t have the knowledge to fully understand the implication of this. But number 1 trumps all.
Peace
Bruce in Philly
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Joined: Sep 2006
Posts: 19,035
Likes: 269
From: Bentonville, AR
I have viewed a 2005 997 C2s MT with the following records
ignition rev 1 640/1663h
ignition rev 2 63/1663h
ignition rev 3 4/1663h
ignition rev 4 4/1663h
ignition rev 5 3/1663h
ignition rev 6 2/1663h
Total engine operating hr counter = 1674h
I desperately need some advice as to if this car is safe to own for many years if I do not plan to over 7000rpm at all. Will the records in rev 5 & 6 = a walk a way from the buy situtation?
Many thanks for your kind assistance.
James
ignition rev 1 640/1663h
ignition rev 2 63/1663h
ignition rev 3 4/1663h
ignition rev 4 4/1663h
ignition rev 5 3/1663h
ignition rev 6 2/1663h
Total engine operating hr counter = 1674h
I desperately need some advice as to if this car is safe to own for many years if I do not plan to over 7000rpm at all. Will the records in rev 5 & 6 = a walk a way from the buy situtation? Many thanks for your kind assistance.
James
I have felt that the overrev counters are in some way protected by some software mechanism to allow Porsche to detect tampering.
Whenever the car is connected to a Porsche diagnostic computer the DME is scanned and I'm sure the overrev counters are read out and these along with a number of other things the DME (and other controllers) has (have) stored/accumulated are sent back to Porsche.
Thus I suspect that low counts in the higher ranges are just signs that these are written with some non-zero values that Porsche can use to know if these were tampered with.
Anyhow, even if you assume the numbers are real I note the time they "happened" was at "1663" hours. The total engine run time is now 1674 hours.
So the engine has run 11 hours and I assume a thorough test ride/drive didn't turn up any scary engine sounds, any scary engine behavior, the CEL light works but is dark after the engine is started and remains dark all the time during the aforementioned test ride/drive?
If so the 3 and 2 in the 5 and 6 overrev counters wouldn't put me off the car.
But you have to go with your gut feeling and if you don't think you like the numbers and knowing they were there would bother you I'd say then walk away.
There is always another car.
Thread Starter
AutoX
Joined: Jan 2014
Posts: 14
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Yes the CEL light remained dark after a 30km test drive. I also hv date of another 05 C2s MT
Is this a better buy based only on the DME data?
ignition rev 1 20982/2225h
ignition rev 2 3189/2225h
ignition rev 3 499/2225h
ignition rev 4 90/647h
ignition rev 5 0/0h
ignition rev 6 0/0h
Total operating hour 2439h
Is this a better buy based only on the DME data?
ignition rev 1 20982/2225h
ignition rev 2 3189/2225h
ignition rev 3 499/2225h
ignition rev 4 90/647h
ignition rev 5 0/0h
ignition rev 6 0/0h
Total operating hour 2439h
Pro
Joined: Apr 2014
Posts: 533
Likes: 7
From: Laguna Niguel, CA
I feel that the first one is better. Second car has seemingly been driven hard a lot of its life and has more miles.
The first report does not appear to be completely correct. I don't believe it is possible to have a 2 reading for range 6 and a 4 reading in range 3.
The first report does not appear to be completely correct. I don't believe it is possible to have a 2 reading for range 6 and a 4 reading in range 3.
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I am just starting to pay more attention to these threads.
Can anyone briefly explain what the different rev counts mean and how this is done?
I have hit my rev limiter a few times, but it then cuts ignition so one simply gets off the gas. How does one go into these high ranges when it should cut the ignition?
Can anyone briefly explain what the different rev counts mean and how this is done?
I have hit my rev limiter a few times, but it then cuts ignition so one simply gets off the gas. How does one go into these high ranges when it should cut the ignition?
Rennlist Member
Joined: Mar 2006
Posts: 6,570
Likes: 89
From: Austin
I am just starting to pay more attention to these threads.
Can anyone briefly explain what the different rev counts mean and how this is done?
I have hit my rev limiter a few times, but it then cuts ignition so one simply gets off the gas. How does one go into these high ranges when it should cut the ignition?
Can anyone briefly explain what the different rev counts mean and how this is done?
I have hit my rev limiter a few times, but it then cuts ignition so one simply gets off the gas. How does one go into these high ranges when it should cut the ignition?
Burning Brakes
Joined: Aug 2015
Posts: 1,184
Likes: 8
From: L.A.
I am just starting to pay more attention to these threads.
Can anyone briefly explain what the different rev counts mean and how this is done?
I have hit my rev limiter a few times, but it then cuts ignition so one simply gets off the gas. How does one go into these high ranges when it should cut the ignition?
Can anyone briefly explain what the different rev counts mean and how this is done?
I have hit my rev limiter a few times, but it then cuts ignition so one simply gets off the gas. How does one go into these high ranges when it should cut the ignition?
http://www.911virgin.com/porsche/rev-range-information/
Race Director
Joined: Sep 2006
Posts: 19,035
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From: Bentonville, AR
Agree with this.
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From: Orange County
This topic get's discussed as often as what oil to use so a search will probably give you the explanations you want. A mechanical over-rev (mis-shift like a hi speed run up through the gears and you go from 5th to 2nd when you were trying for 6th) will get you into the ranges higher than where ignition cut-off comes into play.
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From: Atlanta
I am not so sure about this....... It counts "ignitions" and not revolutions in some band .... what if you let the clutch out but don't apply gas... and shoot the RPMs up into band 6? Most computers are smart to cut gas for mileage if nothing else. When you car coasts down a hill, you are in gear and you let off the gas and coast, the computer cuts gas..... so no ignitions????
I have tracked live values from my Durametric and the car accuratly tracks RPM, digitally. Why doesn't the computer track RPMs in these higher bands and only "ignitions"? If the engine is spinning in an upper range in a danger zone, why doesn't it just track RPMs and time? The data is certainly there.
This may be more complex than we think... the computer may be exactly correct and functioning properly. The problem may be in our understanding.
Peace
Bruce in Philly
I have tracked live values from my Durametric and the car accuratly tracks RPM, digitally. Why doesn't the computer track RPMs in these higher bands and only "ignitions"? If the engine is spinning in an upper range in a danger zone, why doesn't it just track RPMs and time? The data is certainly there.
This may be more complex than we think... the computer may be exactly correct and functioning properly. The problem may be in our understanding.
Peace
Bruce in Philly
Last edited by Bruce In Philly; Dec 14, 2016 at 10:06 PM.