Rev Ranges - 996 GT3 Need your input

[farook]

Hi - I would appreciate any help/input/views on this

I am looking at a 2003 CS 996 GT3 29k miles and I have been given the following data:
- total operating hours 745
- Rev Range 1 ~12500 ignitions @ 741 hours
- Rev Range 2 none

I have been told that the RR1 is 'just' hitting the limiter and the hours is the last time it happened and the ignitions is the total number of ignitions it has had at RR1.

So, it has hit the rev limiter in the last 4 hours of use - ie its been on track recently (the owner has said the car has been on track). He has had the car for over 7 years and I am surprised that he is still hitting the limiter.

Also is ~12500 ignitions high, normal, low for a 12 year old car that has probably been on track several times a year?

Thank you in advance for your help/input.

Best, f

[jackwood]

My car would show very similar results. You don't have to be on track to touch the limiter. It's very easy in first and second to do that if you're having fun.

I bumped the limiter just the other week pulling onto the motorway. The engine is so strong at that end of the rev range that it comes up quickly and there is no drop in performance up to that point to signify that you're anywhere near it.

[puntograle]

That looks fine. Nothing to worry about.

The excitement is usually about RR2s. However, to be honest, even a small number of RR2 ignitions do not materially impact these engines. They have become a bit of an urban myth IMHO.

[farook]

Thanks guys - Now that I understand how easily it is done, I am a bit more relaxed - Cheers!

f

[james S]

puntograle said:

That looks fine. Nothing to worry about.

The excitement is usually about RR2s. However, to be honest, even a small number of RR2 ignitions do not materially impact these engines. They have become a bit of an urban myth IMHO.

I think that rather depends on how bad they are. 996s only have two ranges. RR1 is simply the limiter, but in in RR 2 you don't know whether they occued just beyond the red line with an over ambitous downshift on whether it was a massive miss say 5th to 2rd which sent the revs into orbit.

A reasonable rule of thumb seems to be that if the car has covered say 50-100 hours after the incident you have got away with it. If I was looking at a car with RR2 ten hours ago on a 996, I would be concerned as its hard to predict the damage, if any

[arcamalpha]

Can anyone create a sticky on the Rev Range values/meanings for the various different models?
The discussion is useful about specific examples/situations which are borderline and need expertise, but often we're left without proven information on the ranges values.

[puntograle]

james S said:

I think that rather depends on how bad they are. 996s only have two ranges. RR1 is simply the limiter, but in in RR 2 you don't know whether they occued just beyond the red line with an over ambitous downshift on whether it was a massive miss say 5th to 2rd which sent the revs into orbit.

A reasonable rule of thumb seems to be that if the car has covered say 50-100 hours after the incident you have got away with it. If I was looking at a car with RR2 ten hours ago on a 996, I would be concerned as its hard to predict the damage, if any

Yes, agreed. If it has spent a silly amount of time (e.g. large number if seconds) in RR2 then that is defo worrying (though the system cannot tell you whether all the ignitions took place in a single overrev instance or multiple ones - I would take the worst case scenario and assume all in a single instance). An excursion 'into orbit' should register a large number of ignitions.

Also, as you say, overreving within 50 hours is also questionable.

On the other hand, milliseconds of overrev time more than 50 hours ago should not be a concern...and can be warrantied by Porsche after a few simple tests.

[DiscoColin]

farook said:

- Rev Range 2 none

On a 996, this is the bit that matters. Should be absolutely fine.

[Steve Rance]

996 cups regularly reported over revs of 10,000 RPM and were absolutely fine. I know of one that had an over rev of 11000 plus and a precautionery strip dowm found absolutely no preoblems at all.

The GT3 engine is a pure racing unit and designed for far more abuse than the average cock up on a track day.

I really wouldnt worry about it

[farook]

Guys,

Once again thanks for your input - I bought the following:
996 gt3 club sport grey 2004 29k miles - pics from the dealer site:

;
;


Hope to see you guys around sometime, best, f

[tracydeedance]

Congrats
Dare say you will be putting a few miles on her