NineElevenLover

I was ready to pull the trigger on this car and go pick it up tomorrow. It's a 2003 with only 9700 miles.

http://www.cars.com/go/search/detail...5&aff=national

The appointment had been set and it was essentially a done deal, pending a diagnostic check at a local Porsche dealership to pull the codes from the ECU to see if it had ever been moneyshifted. The results were quite unsettling....

Type 1 - 7830
Type 2 - 364

The tech who did the diagnostic inspection at the local dealership was telling me that it was no big deal. I called a couple local ones, however, that seemed to think it was rather significant. One, in particular, I called and spoke to the service manager. He seemed to think it was alright and I should go ahead with the purchase, but then he decided to put me on hold and speak with one of his techs/mechanics who was more familiar with the over rev codes. When he came back, he essentially said "I'm glad I went to ask my tech, because he seems to think it's a very high number and you're taking a big risk." That did not sit well with me at all. *sigh* I guess I'm no longer interested. So disappointing.

I'm planning on modifying this quite heavily, so I must have a rock solid foundation from which to start. I moneyshifted a car of mine back in the day at the dragstrip, with no immediate resultant problems. About a year later, however, the engine had an absolutely catastrophic failure. I can only assume that it was caused, for the most part, by the moneyshift, as a rod bent and subsequently exploded almost the entire bottom end.

What do you all think?

philooo

from what I head type 2 are fine, no guys ?

I think there are type 3 and 4 and 5 and only 4 and 5 are real over-rev...but I might be mistaken.

wait for confirmation or ..make a search

NineElevenLover

No no, that's on a 997. On a 996, it's just type 1 (hitting the rev limiter) or type 2 (moneyshift).

Michael-Dallas

364 type-2 ignitions would not be a big deal for me.

There are 3 ignitions per crankshaft revolution. The Turbo has a 6600rpm redline, which equates to 110 revolutions/second or 330 ignitions/second. It sounds like this car has been past redline for about a second. And you don't know what rev range past redline since type-2 is any number over redline. So it could have simply been that the ECU could not keep up w/ the laws of physics when the engine bounced off the rev limiter.

FWIW, upgraded ECU flashes will increase the rev limiter to 7k rpm.

Anyway, if you don't have warm fuzzies regardless of forum opinion, then just pass on it. Best to own an auto that you feel 100% confident and happy w/ then to have this linger over you.

Michael.

red911c2

Did they give you the total hours on the car and the hour when the overrev's happened? If they happened years ago, I would feel better about it. If they just happened, you may have some damage that hasn't popped up yet. Good luck!

Zookie

FYI Chipped/ECU Tuned Cars its counts as a "Over Rev" eveytime you go over the Factory Limit rev limit... ECU Tune is usually 200-400 RPM more than Factory...

im preety sure thats where Michael-Dallas is going aswell

redridge

thats a nice turbo... however, at that price you should buy something that you will be happy with... without a nagging thought thats gonna eat at you. Thats prime $$$ for a turbo.

LVDell

What are the total hours?
What hour did the Type 2 take place?

With that said, those type 2's are nothing. I'd be concerned if there was 3640 not 364.

leftlane

That would be a non-issue for me. That number is insignificant.

nick49

Talk with one of the head techs at a large P dealer and ask his thoughts, also ask at what point, # of and type revs, would exclude attaining CPO status. You may ask at P car race shop as well as they build motors and work with altered DME/CPUs.

Macster

The Ecu can keep up just fine or the engine would not run at higher rpms. The Ecu is responsible for determining when and for how long it opens the injector for each cylinder and when to trigger the spark. It also performs real time measurements/calculations looking for misfires.

Porsche for these cars only has two ranges. Rev limiter hit and over rev limiter.

Chances are if the overrevs did any damage the car would exhibit some symptoms from this unless the overrevs maybe happened on a test drive the day before the overrevs were read out.

It would be nice to know what the run time was at the time of the overrevs to know how long ago (or not) they occurred.

Still, I'd be leery of the car that had any range 2 overrevs.

There's a reason Porsche deemed them important enough to record them.

Sincerely,

Macster.

rpm's S2

So... can a range 2 event be recorded for anything but an overrev on a downshift? It would seem that any acceleration related event would be cut off by the rev limiter.

LVDell

Yes. A type two can be recorded (that I know of to date) two ways as well other than a downshift (mechanical over-rev). #1 is when the car has been tuned and the tuner built a higher rev limiter into the flash program. #2 an anomaly where a type 2 (extremely low number) is recorded but no such event took place. Just a glitch and usually in the <100 range.

Michael-Dallas

Taken from the another forum:

The thread is old, but john rice appears to be in your area (norcal). Perhaps you should take him up on his bet if he still owns a 996 Turbo?

And there's a reason why the 997/987 and above have more than 2 types of ignition ranges.

Michael.

Angelus

So how many type 2's are too many? From the statements above I understand a mapped car can gather them more easily, but at what point do you say, "sorry the cars not for me"? What is the consequence of too many type 2's?