Over Rev Report

I purchased a 2008 Boxster S last summer. Currently at 85000 miles. Recently I purchased a Durametric scanner and the over rev report is as follows: range 1 - 1022/2394.8H (7300-7500 RPM) range 2 - 72/2316.1H (7500-7700) range 3 - 2/577.5H (7700-7900) range 4 - 1/218.6H (7900-8400) range 5 - 1/218.6H (8400-9500) range 6 - 0/0H (9500-11000) operating hours counter 2585.8 I am curious on how this stacks up on the abuse VS mechanical empathy scale. What are other folks seeing on their over rev reports? Does anyone have insight into the numbers on this report? Runs great, but should I be worried? Thanks...Steve

That looks like very minimal “abuse” to me, especially given the number of hours on the motor. I’d venture to guess that the very limited number of reports the higher ranges were false alarms. Sent from my iPhone using Tapatalk

Wish mine looked like that. Sent from my iPhone using Tapatalk

I was nervous as hell when I found out that my '14 CPO Guards Red Cayman 981 6 Speed with 30,600 miles, was owned by a police officer, and then people told me that they tend to drive hard and fast and don't worry much about tickets. Until I bought my Durametric, that is. The over rev report showed absolutely no over revs in any of the ranges with 780 hours on the engine. I'm definitely relieved. Engine Module Siemens EMS SDI 9 Information Porsche part number 991.618.602.03 Coding date 22/04/13 Production number 00000000 Over-revs Range 1 0 / 0.00h Over-revs Range 2 0 / 0.00h Over-revs Range 3 0 / 0.00h Over-revs Range 4 0 / 0.00h Over-revs Range 5 0 / 0.00h Over-revs Range 6 0 / 0.00h Operating Hours 789.14

No worries. Looks like once the engine revs hit 8400 to 8500 range, as a guess. Over 9500 would be a concern. Just be sure to run the finest synthetic oil that you can afford and remember that oil filters are cheap.

My feeling is that one or two ignitions in ranges 3 through 6 is just noise. Since there are 3 ignitions per revolution one ignition is not really a measurable quantity. From your ignitions in range 1 and 2 I'd say this engine has hit the rev limiter a few times. No concerns at all.

Old thread - any chance you can tell me how to run an overrev report with the Durametric?

Haven't done it in a while, but if my screen capture is accurate it is under Engine Module - Activations.

Can someone let me know if this is bad or good as I've had the car since 2009. I have a 2007 Porsche Cayman Base 2.7L Range 1 - 8330/4272h (7300-7500 RPM) Range 2 - 422/3874h (7500-7700) Range 3 - 9/3593h (7700-7900) Range 4 - 1/1212h (7900-8400) Range 5 - 1/1212h (8400-9500) Range 6 - 0/0H (9500 -11000) operating hours counter 4419

M97 engines rod bolts are not the best, try to shift before 7000.

I think 4 and 5 are false readings, I do not think you can have 1 over rev in 4 and 5, what goes up must come down so having 1 twice is not logical, I have seen false readings like that before.

Yup, those have to be false. There are multiple threads on the subject. My car has a handful in Range 1, then 1 each in ranges 2-6. Annoying, but a common issue.

Looks like it’s been bounced off the rev limiter often. Not a biggie, but the next owner won’t like it. Sent from my iPad using Tapatalk

He’s saying that all the activity in Range 1 and 2 (which there is a decent amount of, and some of it recently) could have been avoided by shifting earlier. The rev limiter in the ECU automatically cuts the throttle at redline to save the motor, but revving high in sport mode can still exceed the limit and trip Range 1, and possibly Range 2. It looks to me like you probably used your car for track or autocross — and that’s OK, but the next prospective buyer may not be into it if they’re hunting for a babied garage queen. If you didn’t, maybe you just floored it a bunch in sport mode to make some noise? The higher you run the revs, the more wear on the motor. In particular, 987.1 cars have been known to have weak rod bolts, which can cause a rod bearing to spin. I personally lost my first 987.1 engine that way. Many people say to shift at 7000 rpm (or maybe even 6800) to avoid getting Range 1 and 2 overrevs...and hopefully lengthen the life of the motor.

PS. For reference, my cylinder six rod bearing spun at 60K miles with barely any Range 1 or 2 activity — though I had used the car for autocross events.

I went past the redline on RPM's for a very brief amount of time, a Certified Pre Owned Porsche can have a rev range 3, that is what your car has, I would not worry about it, it means the car has been driven like a Porsche and not a Honda Accord.

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I drive in sport as well, I think these cars rev so fast I remember how easy it was to hit the limiter the first week I owned it, you should take it to the track at least once, if you do a PCA event you will have a instructor that will keep both you and your car safe in your comfort level, your yellow car makes me miss my first CS, it was a 2008.

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No, wheel size doesn’t matter for engine revs, just the speedometer reading. The other way to get to the redline is downshifting, when the revs at a speed in the higher gear causes too many in the lower gear. Say you go from 5th to 2nd, the differential will be large, for example, 4000–>8000rpm you will have exceeded the red line with no way for the rev limiter to help. Many an engine has gone ‘BANG’ because of this, especially old 911 ’s with the vague gear linkage. Sent from my iPad using Tapatalk