DME question
10-22-2007, 09:03 PM
#1
Track Day
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DME question
I have searched the archive for DME issues. I am looking at a 2006 C4 demo car(450miles total), with #of ignitions range 1 of 209, and range 2 of 17. Operating hours is 50.6. Is a leakdown and compression test necessary in this case? Is any range 2 overrev acceptable?
10-22-2007, 09:53 PM
#2
Racer
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most here would say no problem until you hit ranges 5 & 6. I would be concerned with even 3 & 4s, but 2 is not an issue.
10-23-2007, 08:19 AM
#3
Range 2 overrevs are mechanically produced. Someone put the car into 2nd gear when it should have been in fourth. A dealer will normally void a warranty if there is a range 2 overrev followed by engine failure.
To put the numbers into perspective, my last car, a 996, with 70,000 hard miles (~20,000 on a race track) had 65,500 range one overrevs and only 125 range 2. I would not buy the car.
To put the numbers into perspective, my last car, a 996, with 70,000 hard miles (~20,000 on a race track) had 65,500 range one overrevs and only 125 range 2. I would not buy the car.
10-23-2007, 11:04 AM
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Burning Brakes
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Range 2 overrevs are mechanically produced. Someone put the car into 2nd gear when it should have been in fourth. A dealer will normally void a warranty if there is a range 2 overrev followed by engine failure.
To put the numbers into perspective, my last car, a 996, with 70,000 hard miles (~20,000 on a race track) had 65,500 range one overrevs and only 125 range 2. I would not buy the car.
To put the numbers into perspective, my last car, a 996, with 70,000 hard miles (~20,000 on a race track) had 65,500 range one overrevs and only 125 range 2. I would not buy the car.
Therefore, in a 996, a range 2 overrev would designate a heavily forced downshift.
In a 997, a range 2 overrev is possible without a forced downshift.
I would not worry about a few hits in Range 3 on a 997. If you search for "DME ranges" you'll get the table here on Rennlist.
-don
10-23-2007, 12:14 PM
#6
Burning Brakes
A buddy of mine picked up the durametric cable/software, and I've used it a few times on my car. I've noticed that you can get range 1-3 hits just by hitting the rev limiter. 5-6 are undoubtedly due to a mechanical overrev ...
10-23-2007, 12:34 PM
#7
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Range 1 - RPM Range 7,300 - 7,500
Range 2 - RPM Range 7,500 - 7,700
Range 3 - RPM Range 7,700 - 7,900
Range 4 - RPM Range 7,900 - 8,400
Range 5 - RPM Range 8,400 - 9,500
Range 6 - RPM Range 9,500 - 11,000
Range 2 - RPM Range 7,500 - 7,700
Range 3 - RPM Range 7,700 - 7,900
Range 4 - RPM Range 7,900 - 8,400
Range 5 - RPM Range 8,400 - 9,500
Range 6 - RPM Range 9,500 - 11,000
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10-23-2007, 12:44 PM
#8
Burning Brakes
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Yessir, with my limited knowledge I would concur.
