Sdgg993

Looking at buying a GT3. Overrevs are listed below, is this something I should be concerned with? Car has 54k on it.

range 1 - 188 1236.6
range 2 - 61 1236.6
range 3 - 35 1124.1
range 4 - 16 1124.1
range 5/6 - 0

operating hours 1419.7


car was tracked, with extensive maintenance records.

Robocop305

The DME is good. Nothing to worry about.

vma1788

What are the RPMs associated with the ranges?

Belinko

That is a personal opinion. To some it may matter more or less. There are plenty of discussions and opinions about it. You as the potential buyer need to be comfortable with the history, condition and price of the vehicle.

997 gt cars
Range 1: 9000-9200 RPM
Range 2: 9200-9400 RPM
Range 3: 9400-9600 RPM
Range 4: 9600-10000 RPM
Range 5: 10000-11000 RPM
Range 6: 11000 and up RPM

Bxstr

Not ideal but not end of world given operating hours between current and time of over rev. Worst case get compression and leak down.

Hella-Buggin'

Very Informative Vid on the over rev stuff.

switchcars

Car appears to have had a money-shift in the past, a few hundred hours ago. Probably no big deal.

Mike J

Yah, here is the comment that sums it up - "Probably no big deal". :-) To me regardless of whether this really is an issue or not, part of the decision is about the perception is you sell it in the future - having over revs into range 4 will certainly reduce the potential size of the buyer community, making it harder to resell. This is proven by this posting itself. In a hot market, not a big deal, but if we have a crash then it might have an impact, but no one knows for sure.

IMHO, if you are comfortable with the numbers and the fact that you will likely be explaining it to the next buyer then it's a mute discussion, but personally I would chose zero over revs (which is what I did with my GT3).

Cheers,

Mike

RAudi Driver

Do your own calculations in regards to how long the needle was in the red. I had to do that with my latest car. Once you understand how minuscule, or not, the time is, you’ll be able to make the decision that allows you to sleep at night.

I purchased my latest with a stage 3 and it doesn’t bother me one bit

Mike J

Unless you are a mechanical engineer who understands how long alloys take too stretch or become damaged (could be microseconds), it's hard to say how many stretch cycles are too miniscule or not. As an example, there have been instances on air cooled engines that experience an over-rev' where impacts do not show up up for thousands of miles, since the rod bolts, having been pulled past their elastic limit and are now longer, are allowing too much bearing clearance on the crankshaft rod bearings, thus beating on the bearings leading to damage. A lack of an immediate failure does not mean there was no damage,

Everyone has different tolerances. I am an engineer, and like a clear no-over rev report lo, but that is just me.

Cheers,

Mike

Robocop305

Porsche overrevs reports are overrated and people are staring to understand it. This is a tool used by Porsche only to deny warranty to perfectly fine cars. You don’t see this garbage with other makers. The Mezger motor is super stout. When you do the math, the total amount of time that it stayed above the redline is minuscule. I wouldn’t wouldn’t worry about the resale because the demand on these rare cars will always be more than the supply. Additionally, the last overrev occurred a lot of miles ago. Don’t think about it and jump on it if everything else checks out. This car is perfectly fine.

bweSteve

Robo, here is where you & I depart (I say that only because we have agreed on SO many topics over the years,... so cheers to that first)....

But I agree with Mike on this one. Just because the damage doesn't show up in the amount of engine hours that Porsche decides is relevant,... doesn't mean the engine doesn't become "tired" much more quickly (later in life) than a zero over-rev 997,... especially when they raised the bar so much higher between the 996 & 997 Mezger GT3.

As Mike also said,... to each his/her own on what their own threshold is. Me personally, I did not buy this car because of some future expected resale value,... BUT I did buy it hoping that I would not have to rebuild the engine within the remaining years of my own life (maybe my son will deal with that,.. but who knows at that point). Anyway,... its still important to me, and I already own the car.

Robocop305

Steve, I agree with you but the overrev report should just be one part of an overall picture, etc. You want to look at other things like how the car was maintained, cared for and current condition among others things. There are excellent cars available that people will skip from buying because the overrev report shows a few milliseconds over the redline. I bet that these GT Mezger engines can easily handle the revs way beyond its DME limits. Just look at the newer ones, non Mezger engines revving to 9k all day long. I have personally seeing cars that had zero overrev with issues, etc. 😉

Robocop305

For example, having these 3 choices which one would you purchase being everything else the same?

Car 1- zero overrevs / tracked often / well maintained. Basically hitting or getting very close to the redline every time is used.

Car 2 - zero overrev / skipped a few maintenance, etc. / often driven to its limits.

Car 3 - minimal overrev logged in while participating at a DE event had a missed-shift. Car is properly maintained and functioning perfectly. Car is usually driven way below the redline.

bweSteve

... aaaaaand we're back. I agree with all of post #13.

post 14 hurt my head