porschefnatic

I'm looking at a 997 turbo for sale and the DME report was the worst I've ever seen.

35,000+ Range 1, 18,000+ Range 2, 7000+ Range 3, 2000+ Range 4, and 50 Range 5 - Is it really possible to have that many range 4 over revs? That means it's spent around 10 seconds between 7500-8000 RPM. Sounds like a lot of bad miss shifts... Around 1700 operating hours with just under 70k miles. Unfortunately it doesn't say when the last over-revs occurred...

The car has exhaust and tune and that's it. I believe in driving these cars how they're meant to be driven, not babying them around, but that all seems REALLY high. Are there any records of cars with high amounts of over-revs having issues? Anyone have thoughts?

Skwerl

How does it not say when they last occurred? It should have the hours next to each range. (2000 / 1204.8h , for example.)

The tune can sort of artificially inflate the ranges 1, 2, and 3 by raising the rev limiter, and those numbers don't look bad at all (50 5s wouldn't worry me much either if some time had passed), but I don't think I've seen one with that many 4s before. Not sure if there are any tunes that let you slip into range 4s out there, do you know anything about the tune on it?

saabin

You really need the hour counter associated with those counts.

My guess is the tune raised the rev limitier to a point where it allows it into that range under full acceleration between shifts.

pfbz

The high range 4 and comparatively low range 5 looks more like a tune that raised the rev-limiter and was bumped into frequently rather than missed downshifts....

You didn't list range 6, was it zero?

On a 997 Turbo, stock redline is 6750. Range 4 is 7400 - 7900 RPM, so if a tune bumped the redline by 650 or more, it would be hitting range 4 just on the rev limiter.

TT Surgeon

7500-8000 rpm for 10sec is a walk in the park for that motor.

Harry Da Hamster

Nothing scientific and just a lot of rambling...

Over-revs are not ideal, but i think there's an over reaction to it. Rev range 4 is from 7400-7900 rpm. A 997.1 GT3, which uses the same engine but with upgraded rods, has a rev limit set at 8,400 RPM. Yes the rods are probably much better than what's on the Turbo, but at the same time a 6,800 RPM rev limit is very low. I've seen trucks safely rev much higher.

therock88

Agree with above....And interestingly, the one thing this actually proves for all the Rev report droolers....This car has a ton of range 4s....And I assume since it is for sale it is still running? ... and did not...SPLODE!

DC

T10Chris

While I agree that there is an over reaction to over-revs so long as they are far enough behind and the engine runs fine, there are more than just rods different in GT3... The crankshaft is different to allow a more race/high rpm bearing shape, this is why the rods are different... Pretty much everything that moves inside the motor is different.

Again, if the car runs fine and the overrevs are far enough in the history, I wouldn't run away because of it. Use it as a negotiation point maybe, but as long as it checks out it isn't a deal breaker.

estrellajon

Agreed with all the responses above

TurnOne

Not the end of the world, but definitely a car that has been 'driven'. Some are willing to pay more for a car that was lightly driven.

bmwtmx

That is an absurd statement and seems to reflect the wrong opinion of the over-rev crowd. My 996TT had the same exact number of over-revs from when I bought it to when I sold it. It had 1 owner before me who was a Dr. (not that that matters much) except he drove it regularly to the hospital lot and back. He never tracked it and didn't modify it. Maybe he missed a shift or two.

I on the other hand modified the car and tracked it regularly one. When I went to sell it a P-shop down here who did the PPI said that because it had ANY over-revs the buyer should walk. This is their advice while in their garage were for sale and customer GT3's amongst others. I have never gone to them again and lost all respect for them. This is clearly a know-nothing issue.

Harry Da Hamster

Good point, bmwtmx. A street driven Porsche with some over-rev's might be driven "lighter" than a Porsche that has only seen track miles with less over revs.

However TurnOne is correct with the fact that sometimes over-rev's may be the only indication, though not the true indication, on what kind of life the car had.

porschefnatic

Thanks everyone for the responses. I think the general consensus is that over-revs are blown out of proportion. The car has a raised rev limiter and sometimes when you shift the rpms jump up to 7500 so I see why it has the range 4s now. Nothing to worry about IMO

strato58

Looks like that engine builder knew what he was doing when he built that motor.

Bskyoon

Excuse my ignorance, but to me it sounds like a lot of hard launches. When I see 10s at that range I picture a car at the drag strip hitting the rev limiter as it prepares to launch. Just because it has an exhaust and tune doesn't mean it has only ever had just an exhaust and tune imo. In any case I agree w the above, one thing everyone seems to say is that the engine and tranny are bullet proof.