Looking at a used 08, and had them do a scan. Does this look OK for engine revs?

Number of ignitions at speed > maximum speed, range 1: 51
Number of ignitions at speed > maximum speed, range 2: 5
Number of ignitions at speed > maximum speed, range 3: 1
Number of ignitions at speed > maximum speed, range 4: 1
Number of ignitions at speed > maximum speed, range 5: 1
Number of ignitions at speed > maximum speed, range 6: 1

This looks fine, but surprisingly low. Anyone with expertise on this? Am I looking at the wrong table? I have a full computer diagnostic scan.

I'm not an expert on this but have seen this before where the speed range from one to 3 o4 are acceptable above that - NO usually you get a 5 and 6 range from downshifting to a wrong gear so there is no rev limiter to prevent it from going into the VOIDED Warranty zone.

My understanding is that if you have a real problem in ranges 4-6, the ignitions would be way more than 1, it looks like 1 is some kind of initial value. No way you could miss a gear in a downshift and have only 1 ignition in 4,5, or 6, right? It's been a long time since I analyzed these. Main thing is I have the scan from time of purchase, and the car is CPO'd, so if Porsche tries to void the warranty, I can show the scan pre-dated my taking ownership, and at the time the car was CPO'd.

unique series for sure w/ all the 1s in 3,5,4,6 . One thing to also pay attention to is if the total range on the DME scan matches up w/ the mileage of the vehicle

Do you know where I'd find the "total range"? I'm not sure I understand what you're referring to. And do you agree with my sentiment that having the scan prior to purchase is sufficient to guard against Porsche trying to void the CPO? I can't imagine them doing that to a CPO'd car if the DME is in hand, and what they object to is evident in the DME.

Right below the DME over-rev readings is a separate line: Total operating hours [for the engine via this particular DME]. It's good to know how/if the total range aka engine hours are in line w/ total mileage. For a quick calc, take vehicle mileage divided by operating hours for an average lifetime speed range (again for this DME). Fore example, if mileage is 30k and DME total op hours are 200, this means avg vehicle speed while engine running was 150mph ......... or the DME was more likely replaced somewhere in the last 10,000 miles. Basically it gives you another place to look if needed and/or can clue you in to how car may have been driven over all.

As for the over-revs... general rule of thumb around here is to avoid any vehicle w/ 4s or above. 1 in each is not consequential IMNSHO. Someone here once calculated it back to how many cylinder ignitions there could be per 1/10, 1/100, and 1/1000 of a seconds for each over-rev range. I agree and don't think it'd be any issue w/in CPO period (especially provided date of DME read out was pre-CPO or at least pre you buying vehicle). Outside of CPO I don't think it should but it's anyone's guess as mere presence of any could pose issues...

Good luck

I know a guy that got a range 6 and blew his engine in the process - missed a downshift. I would run on this one.

so what does a 6 mean..1000 rmp over redline?
just throwing a number out there as I have no idea what 6 is

The stages vary by car, but my GT3 would go over 11,000 at a stage 6. It would be between 10,000 and 11,000 with a stage 5.

Stage 1 is hitting redline on any car - no big deal. Stage 2-3 is still pretty innocent. 4 is troubling and 5 is bad news, while a 6 is dangerous. Just a general rule of thumb for any DME scan per the tech that explained it to me. Warranty work on the engine with a 5, or 6 might get denied by Porsche.

The 1 indicates that one event occurred. There should also be an amount of time that it stayed in that range. Could have been a split second, but the damage can be done by then for the higher stages like a 6. There were numerous events at stage 1 which is common because you are hitting redline at this stage.

I'm picking up the car tomorrow, and frankly I'm more confused than before. Are folks saying that the presence of a 1 for stage 6 is a reason to walk? I have seen DME scans before on 911s and have never seen a 1. The 1 means ignitions, does it not? How is it even possible to have a perfect 1 ignition for each stage? I've never seen anything but odd (and larger) numbers for cars with trouble.

The idea that Porsche can deny service on a car that has been CPO'd, and with a DME that is prior to time of sale seems really out there. Do we all need lawyers when buying used Porsches? For that matter, even a new car on the lot could have been mis-driven by a would be buyer prior to sale.

Not saying that I can't be convinced to walk on this car, but I'm just not quite convinced at this point with what I'm reading, maybe I'm just not understanding something.

I could only find these two values:

Operating hours counter: 850h
Operating hours since powerfail: 265h

Then it had these:

Operating hours counter reading at overspeed, range 1: 850h
Operating hours counter reading at overspeed, range 2: 590h
Operating hours counter reading at overspeed, range 3: 299h
Operating hours counter reading at overspeed, range 4: 299h
Operating hours counter reading at overspeed, range 5: 299h
Operating hours counter reading at overspeed, range 6: 299h

22k miles/850h = ~25mph. When you think about most people spending time in local traffic, this makes sense. I just don't see this car as having been driven in an abusive way based on what I'm reading, although I'd love to know what "Operating hours since powerfail" means.

Those 1's are errant readings. Ignitions are cumulative so you can't have 1 in a range without the preceeding range having more than 1. You have a good DME report.

Yes you're fine. It's a good car. Worse case scenario, during the 299th hour of operation, the engine was overrev'd.

I'm always amused when someone posts a DME report. Very few people actually read these correctly.

If you search DME scan posts, virtually every post has someone saying "run".

The tolerances of these engines are quite remarkable. The only time you will run into problems are if you do a 5-2 downshift and leave it there until something happens, usually involving smoke. When you tow it into Porsche and it currently has 1000 hours on it and there was a Stage 6 overrev at 1000 hours, guess what; you're paying for it yourself.

"Major Engine Damage".....

So, 1 over rev in the 299th hour. It is now over 1000? So, here's a radical question. Does it run? Wait, it's CPO'd, right? So Porsche clearly doesn't have a problem with it.