Hi all,
Recently purchased a 09 Turbo 5K miles. My durametric would not read the engine DME, so I took it to the dealer for a pre purchase inspection and specifically asked about over revs. Received the full DME report and asked the mechanic where the over rev report was, he replied "if there were any over revs they would come up as Fault on the report".

OK.

I purchase the car based on the PPI, get it home and get the new Durametric software and find over revs in all Six ranges!

First I'm really pissed at the dealer, don't know what I can do there...

Second the overrevs in ranges 4, 5 and 6 were minor...
Range 4 had 46 @ 106 hours, car has about 150 hours now
Range 5 had 1....how does that happen?
Range 6 had 1....how does that happen?

Range 1, 2 and 3 were all less than 1000

Looking for a little advise, I realize this topic has been discussed adnauseum.
Thanking you in advance for your patience and any experience, advise or help.

 

I wouldn't lose any sleep over this. There are many perfectly healthy 997s, including mine, out there with more overrevs than your car. A single ignition for ranges 5 and 6 is a very short period of time. You could complain to the dealer and get them to assure you they would not consider the preexisting overrevs if you ever had a warranty claim.

 

The R5 & R6 were just miss shifts...ie 5th to second more then likely by accident since the car is so new/lack of use. The 5 & 6 rate to the range of rpm's that were hit on the down shift...(I don't have any info in front of me, but like cruzing along at 5600-5800 and then down shift to second by mistake could spike it to, less say 7,500-7,800). The R6 is kind of odd, but **** happens! : ) It / you should be fine.

 

The other point that may be relevant is that the Durametric does not report the DME rev data accurately. There have been a few posts on this.

I'd take it back to the dealer you paid to do the PPI with the durametric printout and ask them for the DME data from their machine. I would insist they do it for free since you already paid for the PPI.

 

I've had other 997's and missed a shift going from 5 to 6th ending up in 4th for a nanosecond, but the DME caught 250 ignitions in range 4, so I dropped the oil and cut open the filter, no metal and the car seemed fine, put anothe 12K on her without any problems.

I was just curious how one would get just one ignition in Range 5 and one more in Range 6 how does that work to only get one ignition?

Was it a missed up shift and because it close to the 5 & 6 range it recorded just one ignition...looking for ideas..

Thanks

 

I'm under the impression that typically a misshift will register a "pyramid" of over revs... A few in the highest range, more in a lower range, and so on. A single ignition at a high range is peculiar, you usually get at least 10s of ignitions. (1 ignition is an impossibly short period of time) I wouldn't worry about this.

I would take this back to the shop where you got the PPI for another read, though. What the mechanic told you is bogus. The readout always lists all six ranges, even if all are zero.

 

I've been told that R5 and R6 might void your warranty, it varies from dealer to dealer, but I know for a fact my dealer will not CPO it

 

I couldn't find my Over Rev (PNA Internal Use only) chart that somehow ended up in my hands, but I did locate another link on 6speed regarding this topic. You might find it enlightening:

https://www.6speedonline.com/forums/...ported-ok.html


"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

As the car redlines at 7,000 and the tach is buried at 8,000, is this a concern? How would you interpret these reading toward how the car has been driven?"

 

Okay, I spent a little more time looking for the PNA graph...I can't find it...!!!

Its a sliding chart based on your model and engine type. So the R6 above might be for a RSR... not a Turbo....the Turbo R6 might be more comparable to the R5 listed in the posting above.

When and if I can find the chart I'll post the numbers for the various models that were listed.

 

I agree with Arash, the revs need to be in a pyramid. Physically impossible to get r6 without going up and back down thru r5. I have read that 1 ignition in a range can be a reading error. Of all the DME's I've seen from CPO cars I considered, all are in a pyramid and a few have this 1 and 1 at the top. I wouldn't worry and besides, these engins are overbuilt.