When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have looked at many DME's and that is the strangest one yet. Usually it's a build up from low to high revs...looks like this was one super "zing" past redline with a very limited duration. I would be wary as it is fairly recent.
I have looked at many DME's and that is the strangest one yet. Usually it's a build up from low to high revs...looks like this was one super "zing" past redline with a very limited duration. I would be wary as it is fairly recent.
"super zing" is the right term for this one for sure.
That being said, it's.still been almost 100 hours since that event and issues from it should have already surfaces, but I don't think it's a car I'd buy with a $35k engine build on the table if something were to show up.
Truthfully, probably no big deal and I would think 99% of the 911s I had growing up and racing throughout the 80s and 90s had tons of over revs. 911 owners back then were a bit “different.”
The problem now is the kind of people that will never see or live on the red line are the kinds buying these now and they are scared of them because they probably don’t know any better or because Internet forums make huge deals about stuff.
if you are buying it for you to abuse and gave fun, go for it. If buying to sit in a garage, look pretty and tell others about it before you sell it, find another one because it will be discounted and not as liquid.
This topic is of current interest to me, for the wrong reasons...
I did find what looks to be a credible reference that offers an opinion that a window of 50 hours (operating) past the overrev event could be considered sufficient if other symptoms/outcomes/etc did not occur. Porsche rev range activity | engine over revs explained by 911virgin There is other useful information in this page also, FYI.
It could be worthwhile to calculate the number of engine rev's which occurred during these overrev periods, using 3 ignitions per engine rev. For your R6 case, I get 203 engine rev's. You can then calculate the actual duration of this event to put it in more recognizable terms. I get 1.3 seconds. The R6 range is over 9500 rpm, on a 7300 rpm redline engine. Your R6 event seems significant, to me anyway.
The overrev article I referenced also mentions the idea of getting a compression test and UOA (used oil analysis) for determining potential damage. I am not an engine expert and I am sure others might offer better possibilities. Regardless, if it were me, I woud have the engine checked by a very reputable Porsche mechanic.
Definitely a "money shift" occurrence before someone depressed the clutch to catch it. Is this engine OK? Most likely yes. Either try to negotiate heavily on this point or walk away.
Seeing anything over (1) in 4,5,6 is generally a bad thing. (1) is considered an erroneous reporting.
This topic is of current interest to me, for the wrong reasons...
I did find what looks to be a credible reference that offers an opinion that a window of 50 hours (operating) past the overrev event could be considered sufficient if other symptoms/outcomes/etc did not occur. Porsche rev range activity | engine over revs explained by 911virgin There is other useful information in this page also, FYI.
It could be worthwhile to calculate the number of engine rev's which occurred during these overrev periods, using 3 ignitions per engine rev. For your R6 case, I get 203 engine rev's. You can then calculate the actual duration of this event to put it in more recognizable terms. I get 1.3 seconds. The R6 range is over 9500 rpm, on a 7300 rpm redline engine. Your R6 event seems significant, to me anyway.
The overrev article I referenced also mentions the idea of getting a compression test and UOA (used oil analysis) for determining potential damage. I am not an engine expert and I am sure others might offer better possibilities. Regardless, if it were me, I woud have the engine checked by a very reputable Porsche mechanic.
Good luck.
The last I read from Porsche was that 5-6 was acceptable for warranty after either 200 or 250hours of operation after the event then compression test. i'm presonally fine with over rev in 5-6 range, my car had 170 in range 6 when i purchased it, but they were 1800 hours old.
Dumb question, is over rev to the redline... or beyond?
__________________
Your place for distinguished automobiles, proud provider of Fidelity & Freedom Warranty extended warranties. Visit us at Highline-Autos.com
The fact is it may or may not be fine but why pay 10's of thousands of dollars for that history when you can buy one without it. It may work out just fine for you but I would need the range 6 discount to make for the loss of resale on the back end.
03-22-2023, 10:11 PM
Opinion on over rev report
