Just had the used CS I am looking at check at the dealer. I don't have all of the numbers, but there were maybe 380 hits in range 3 and 200 hits in range 4 (plus, of course, more in the lower ranges). The dealer I spoke with (who won't be the servicing dealer) said as long as there aren't any hits in ranges 5 and 6, no problem in terms of engine warranty. Previous posts on this board suggest differently.

Comments?

Thanks--Scott

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'07 Cayman S, '98 M3 daily driver/track toy, '04 Wrangler

Here is a recreation of a document given to me by a Tech at a local Porsche dealership. Yes, this is real. He said this applied to the Cayman as well and was given to them during training on diagnosis issues:

--

There are several stages of imminent disintegration for the new 997s that will be evident in the log print out.

RPM Ranges:

1 - RPM Achieved 7300 to 7500 Likely Result Oh, behave Abuse
2 - RPM Achieved 7500 to 7700 Likely Result Ooooh! Abuse
3 - RPM Achieved 7700 to 7900 Likely Result Ouch! Abuse
4 - RPM Achieved 7900 to 8400 Likely Result Dammit! Did you here something pop too? Possible Damage
5 - RPM Achieved 8400 to 9500 Likely Result I’ve been hit! I am losing power! Definite damage
6 - RPM Achieved 9500 to 11000 Likely Result Live grenade! Take Cover! Going, going, gone!

--

The tech told me that Zone 1 and 2 will not likely effect warranty, but Zone 3 and above certainly would.

I had my car tested and after multiple track days and hard driving I had zero Zone 3 and above hits. YMMV.

You should talk to PCA-TECH about this (first off he can clear those for you so that your ECU would be clear).

As I understand it, Porsche only raises warranty objections for the top two tiers unless there is some other obvious sign of abuse. Nearly all cars will have over-revs in ranges 1 and 2 if the owner has ever bumped the rev limiter, some may even have range 3 over revs. Of course the amount of time the engine spent in that stage is also important. I'm pretty sure these are engine revolutions, so a car with 200 revolutions in range 4 probably means it missed a single downshift as an engine turning 7800rpms would be turning what 130 rotations per second so it spent 1-1/2 seconds in that range. Is that enough to do engine damage? Likely not. Our engines will take punishment up to almost 8500 rpm on a fairly regular basis, certainly more than 1-1/2 seconds worth of missed shift. The ECU also records when this happens in terms of total hours of engine life so you can sometimes backtrack to a specific event that caused it by zeroing in on when it occured.

I'm willing to bet that nearly everyone here has over revs in some range, some higher than others. The question comes down to warranty. Is the dealer raising any warranty issues over these over-revs? If not, then you should be fine and as I said you can clear them out of your ECU and "feel" better about it if you want.

BTW the 380 revolutions in stage 3 were likely from the same event and recorded those revolutions on the way up and the way down, again a few seconds worth of time in that range and I doubt anything to be concerned about.

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PS. Send me those PCCB's for the advice.

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I polled techs at 3 dealers. One said no issue (with either the engine or warranty). One said that it would raise a red flag, but not necessarily be grounds for a warranty claim denial. One had no experience with overrevs on any cars.

Sounds like a grey area, and in general probably OK. It is the probably and almost 60 grand that don't fit so well together for me.

K-Man S--looks like your PCCB's could be in jeopardy.

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'07 Cayman S, '98 M3 daily driver/track toy, '04 Wrangler

Where you talking to "techs" or service writers? There is a real large difference in the knowledge. You could always call Porsche of America.

Techs--the service writers didn't know.

Trying PoA is an interesting thought--my previous experience going "up the ladder" for this type of information hasn't been good, though.

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'07 Cayman S, '98 M3 daily driver/track toy, '04 Wrangler

Scotty why not buy the car and clear the over-revs? Then there is nothing for the dealership to point to and raise a fuss about. Get that mailing label ready...

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Hypothetical question. What if you missed a shift and did damage to the engine...then cleared the ECU and tried to get it covered under warranty. Would this be considered fraud? Would Porsche not suspect anything with it totally clear?

Where do you draw the line?

Doesn't a Porsche dealer have to clear the DME? And if they do, isn't that logged under the VIN?

Or is there a back alley way to clear it?

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'07 Cayman S, '98 M3 daily driver/track toy, '04 Wrangler

No some DME's could be totally clear, obviously more mile is greater chance but YES that would be fraud if your missed shift caused damage that you tried to get them to fix for free under warranty.

There are ways of clearing the over-revs without it being logged or showing up in any way. The Porsche dealership isn't required to clear them, I've seen situations where they have and where they haven't.

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