Just a little note.
When I purchase my car I did not have access to Durametric or PIWIS and I had only 2 hours inspection time since I made a trip to Florida especially to look at the car. I finally bought it and later got a Durametric. I was really choked by the numbers I saw which was type I 65535 (which is the maximum recorded by the ecu, it won't go over that number !!!) and Type II 67.
And I calculated that all these over revs were done by the original owners not by the one I got the car from since he made only 2000 miles with the car...
The car run great, strong, no metal in the filter but who knows ???? Cross my fingers....

 

Thanks for the video

So 3 ignitions per revolution, correct?

 

Not easy to count the spark on the video but you got it 3 sparks per revolution....

 

No need to count or watch video.

Think of one individual cylinder. One revolution will give you compression then ingintion, then the second rev gives you exhaust and intake/fill. So two complete rev for one complete ("4 stroke") cycle.

Now think if a crankshaft connected to 6 cylinders- in two revs all 6 will fire once- 3 one rev, the other three on the next rev.

You can use this concept to figure out how many firings for a V8, V10, 12cyl, etc...

(not sure about a W12..>THAT makes my brain hurt a bit.. )

 

Thanks for all the feedback! I pulled the trigger, though I did get a 4 year 48,000 mile warantee anyway. So if anything blows up, I hope it does it soon, though I'll be quite easy on her anyway!

 

congrats! who did you buy the warranty through?

 

correct

I posted this on the gt3 forum and 997 turbo but I altered it a bit to be applicable here too.

To calculate ignitions to seconds just change the rpm's of the example given below to the 996tt ones.

DME stores number of ignitions over 6 ranges of rpm for the 997s and 2 ranges for the 996s and the operating hours of the overrev occurrence.

Ignitions are the firings of the spark plugs
On the 911 because its a six cylinder 4 stroke engine you get 3 ignitions per 1 revolution.

For example in a 997GT3.1 you divide the max rpm limit of 8400rpm with 60 seconds and you get 140 revolutions per second of the engine at redline.
Multiply this by 3 and you have the ignitions per second of the engine at redline 140x3= 420 ignitions per second on the rev limiter.
From this you can see how long *in seconds the engine stayed in a particular rpm range and also from the operating hours you can see how long ago this happened.
On the 996 GT3 with rev limiter at 8200rpm 2 types of over revs were recorded in the DME type 1 that recorded every ignition above 8201 rpm. And type 2 which recorded every ignition above 8801 and to infinity.

From the 997 introduction newer DME has the ability of recording not only type 1 and type 2 but 6 types so that the dealers can check easily not only when a type 2 overrev happened and how long it lasted but also at what range of revs.
Type 1 are stored SAME like in 996 for all 997s meaning that type 1 is very common and every one who hits the rev limiter while accelerating should have them.
Type 2 to 5 is adding 200 rpm more for each range and type 6 are overrevs fe. over 9500 and to 11000 and if recorded in dme will void your warranty.

Hope this helps

John

 

Yes, I got the 4 year, 50,000 mile warantee!!

Thanks everyone for the feedback , the car is amazingly fun to drive. I'm so happy about the suspension compared to stock also. I'll post photos after I get some decent shots.