pickles

I think the first section is what counts, but I got the entire scan from the dealer and found another section that looked interesting so I'll post it as well. Many thanks to the experts here who can shed light on whether this is Good(TM) or Bad(TM) or neither...

Number of ignitions at speed > maximum speed, range 1: 646
Number of ignitions at speed > maximum speed, range 2: 168
Number of ignitions at speed > maximum speed, range 3: 45
Number of ignitions at speed > maximum speed, range 4: 5
Number of ignitions at speed > maximum speed, range 5: 0
Number of ignitions at speed > maximum speed, range 6: 0

Operating hours counter reading at overspeed, range 1: 499.3h
Operating hours counter reading at overspeed, range 2: 499.3h
Operating hours counter reading at overspeed, range 3: 454.3h
Operating hours counter reading at overspeed, range 4: 99.2h
Operating hours counter reading at overspeed, range 5: 0.0h
Operating hours counter reading at overspeed, range 6: 0.0h

Edgy01

When I had about 29,700 kms on my car they ran A DME scan for me showing 5938, 235, 55, 1, 0, 0.

I never have had a "money shift." I'm a fairly aggressive driver,--shifting at redline a lot.

Your printout shows what I consider to be a fairly conservative amount of hits on it, save the range 4 hits with a count of 5. it's out of place. I KNOW how I drive and KNOW when I hit my range 4 counter. 5 hits seems realyl high to me there. The real numbers (they say) are the hits to ranges 5 and 6. Zero is the only acceptable number in those two ranges.

WHEN these overrevs were hit tells us a lot as well. If the hour counter shows that it was some time ago, it's a safe bet that the engine didn't suffer from the hits,--it's still chugging along. Porsche AG and PCNA look closely at the age of the hits. If they are recent, only time will tell if you have a problem.

The advent of the "black box" in Porsches is there mostly to protect Porsche from the screwball drivers who swear up and down they they didn't do anything wrong. They can also protect future buyers from a history of abuse.

Bottom line,--I'm not too concerned about your numbers.

996toomey

I agree with Edgy above and will only add it is important that there are no DME fault codes. If you are looking at a 37 page CPO inspection this should be listed at the top of page one I believe.

skizot

Ranges 1-3 = no worries
Ranges 4-6 = avoid if possible

Is this your cars readout or one you are looking to purchase? Me personally, I would avoid range 4 or higher if this is a car you are looking to purchase.

pickles

It's a car I'm considering purchasing. So range 4 or higher is bad eh, well I guess I'll cross this off my list. Although Edgy doesn't seem to totally agree but he did raise it as being out of place.

gota911

I would not pass on this car just because of the 5 in rane #4. I think it is possible to reach range 4 in a normal overrev. It is my understanding that overrevs in ranges 5 and 6, "could" void the warranty. You could check with a Porsche service or regional rep to get their take on the readout for this car.

roberga

zone 5 would be about 150 ignitions per second so 5 would be what a 30th of a second? check with the dealer but I am pretty sure they would be able to CPO the car with those numbers

pickles

Sorry not following you, did you mean zone 4? There are no ignitions in zone 5 for this car.

996toomey

The more critical thing to look at here is whether or not there are any registered faults in the DME. If any damage is/was caused by an over rev it will leave a fault code in the DME.

As long as there are no fault codes the car can be CPOed no problem. If you are not comfortable with it just move on to another car.

Edgy01

Again, the 5 in Zone 4 seem out of place,--a bit high. I had the shop run another DME scan for me just last week and here's the results on mine:
5938, 235, 55, 1, 0, 0 (at 29,700 kms)
7011, 311, 59, 1, 0, 0 (now at 64,260 kms)

If you contrast that with the earlier figures I gave you, it's evident that I still barely touch the rev limiter (keep in mind that the momentum of the engine's climb can cause you to bust the redline, although you are putting the clutch in before it hits 7200).

Thus, I still drive it aggressively but still have not contributed to the upper ranges in about 35,000 kms. My understanding is that Porsche sees the 5 and 6 zones as their way out of warranty coverage.

Your car would be at about 500 some hours on the clock (based on the DME read out--contrast that with mine at 984 hrs).

Doing some simple analysis, in TWICE the operating time, I have a 5th the number of bumps in the 4 range which seems to be the area we're watching closely. If the driver of the car you're checking out continues at the rate he is with that car in theory he could rack up 10 incursions into the range 4 area,--which is ten times where I have been.

Dropping down to an analysis of the range 3 numbers, his number of 45 would conceivably double to 90 in the same operating time as my engine with a total of 59 bumps into range 3.

What the numbers you provided tells me is that the driver doesn't routinely bump up against the rev limiter (like I do) but when he does occasionally do it, he does it deeper into the rpms.

Hope seeing my numbers gives you a little bit of insight into things.

cole328

Stupid question does a range "3" for example mean that someone hit the rev limiter in 3rd gear? This DME issue is confusing to say the least

gota911

Cole,

The ranges have nothing to do with the gear the car is running in.

A 997-1 DME records the following rev ranges:
Range 1: 7300-7500 RPM
Range 2: 7500-7700 RPM
Range 3: 7700-7900 RPM
Range 4: 7900-8400 RPM
Range 5: 8400-9500 RPM
Range 6: 9500-11000 RPM

When a range has a value greater then 0, that indicates the number of ignitions which occured in that "RPM range."

No HTwo O

I'd take a pass on this car. There are sooooooo many Porsches for sale, why deal with this potential issue.

pickles

Remind me again, what's the redline on the C2 coupe? Maybe I will pass on this car. Thx.

No HTwo O

Pretty sure 7,200 RPM. That's why range #1 starts to catch (count) them at 7,300.