Overspeed Question

Overspeed Question

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am0611

Original Poster:

103 posts

184 months

Wednesday 26th November 2014
quotequote all
Just wondered if anyone can explain the following seemingly random over-speed numbers:

At 589.7 engine hours
Range 3 - 2,839
Range 4 - 362

At 613.4 engine hours
Range 3 - 2,856 (plus 17)
Range 4 - 363 (plus 1)

At 634.5 engine hours
Range 3 - 2,857 (plus 1)
Range 4 - 364 (plus 1)

This is on a 997 GT2 that I think I haven't over-sped.

Just seems strange to be getting one addition ignition at a time.



Edited by am0611 on Thursday 27th November 11:38

am0611

Original Poster:

103 posts

184 months

Thursday 27th November 2014
quotequote all
Glad it is not just my car.

Owners/Buyers/OPC's should be aware of the problems of using this "snap-shop" data to make decisions on selling, buying and warranty (including asking for compression tests...).

I'm glad I am now keeping an eye on this and every time (for the last 3 visits) I go to the OPC, I get a periodic picture of the over-revs for my records. Having this data makes the car look better than it initially looks on the surface.

Compare (a) & (b) below

(a) Without periodic data - Engine Hours: 634.5, Range 3: 2,857 (last at 633.4), Range 4: 364 (last at 633.4)

This could be seen as a car that has been over-revved recently with problems to come.

(b) With the periodic data
Range 3 can be seen to have had 2,839 at 246.0 hours (no data before) but since has run nearly 390 engine hours with only 18 more, including at least one erroneous reading
Range 4 can be seen to have had 362 at 199.2 hours (how many are erroneous I don't know) but has since run nearly 435 hours with 2 single erroneous hits at 597 & 633 hours.

As you can see (a) and (b) look very different prospects but are the same car...





Edited by am0611 on Thursday 27th November 11:49

am0611

Original Poster:

103 posts

184 months

Monday 1st December 2014
quotequote all
Yep, gave up the warranty 4 years ago. All down to frustrations with Rev ranges, compression test requirements, having to use N rated tyres & crappy Porsche batteries that died frequently in the heat of Dubai.

Run mine warranty free with non-N rated tyres & non standard battery. The money I saved on batteries, tyres (not running semi-slicks that need to be changed regularly), warranty & compressions testing is sitting in my bank account for that day when I need to spend some cash on the car.

Buyers choice for me, my risk I know but I prefer that rather than supplier dictate which I hate.