Another DME
10-13-2018, 03:08 PM
#2
The Rebel
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They were all very short lived, the range 2-4 over-revs are concerning. However, I wouldn't be too concerned with them because they happened so long ago; the engine has logged 300+ hours since those over-revs occurred.
Utilizing 8400 rev limit:
443 in range 1= 1.05 seconds
156 in range 2= .37 seconds* (300+ hours ago)
114 in range 3= .27 seconds* (300+ hours ago)
102 in range 4= .24 seconds* (300+ hours ago)
*Approximation because we're not sure what the engine speed was when this occurred. Nevertheless, it'll give you an idea.
Rev range 1: 8,400 -1 ... to 9,200 -1
⇒ Maximum permitted engine speed exceeded; engine damage possible.
Rev range 2: 9,200 -1 ... to 9,400 -1
⇒ Maximum permitted engine speed exceeded; engine damage possible.
Rev range 3: 9,400 -1 ... to 9,600 -1
⇒ Maximum permitted engine speed exceeded; engine damage possible.
Rev range 4: 9,600 -1 ... to 10,000 -1
⇒ Maximum permitted engine speed clearly exceeded; engine damage probable.
Rev range 5: 10,000 -1 ... to 11,000 -1
⇒ Maximum permitted engine speed very clearly exceeded; engine damage very probable.
Rev range 6: over 11,000 -1
⇒ Engine damage has generally occurred.
Utilizing 8400 rev limit:
443 in range 1= 1.05 seconds
156 in range 2= .37 seconds* (300+ hours ago)
114 in range 3= .27 seconds* (300+ hours ago)
102 in range 4= .24 seconds* (300+ hours ago)
*Approximation because we're not sure what the engine speed was when this occurred. Nevertheless, it'll give you an idea.
Rev range 1: 8,400 -1 ... to 9,200 -1
⇒ Maximum permitted engine speed exceeded; engine damage possible.
Rev range 2: 9,200 -1 ... to 9,400 -1
⇒ Maximum permitted engine speed exceeded; engine damage possible.
Rev range 3: 9,400 -1 ... to 9,600 -1
⇒ Maximum permitted engine speed exceeded; engine damage possible.
Rev range 4: 9,600 -1 ... to 10,000 -1
⇒ Maximum permitted engine speed clearly exceeded; engine damage probable.
Rev range 5: 10,000 -1 ... to 11,000 -1
⇒ Maximum permitted engine speed very clearly exceeded; engine damage very probable.
Rev range 6: over 11,000 -1
⇒ Engine damage has generally occurred.
10-13-2018, 04:37 PM
#4
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10-13-2018, 06:44 PM
#5
Rennlist Member
I'd love to know how many people, if any, bought a car with stage 4 over revs and had the engine detonate during their ownership. Over revs certainly tell a story with regards to a car's history, but I'm starting to feel like the importance of a clean DME is largely overstated. Correct me if I'm wrong.
10-13-2018, 11:02 PM
#6
Nordschleife Master
Overared yes
many cars had two ECU when tracked in 2010-11...so u could tune it and hide over rev
some cars had them erased, no impossible
my car on the other hand has a lot, it’s beat. And drives fine
many cars had two ECU when tracked in 2010-11...so u could tune it and hide over rev
some cars had them erased, no impossible
my car on the other hand has a lot, it’s beat. And drives fine
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10-14-2018, 03:18 AM
#8
The Rebel
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Again, I wouldn't be too concerned if any with these numbers. If, and it's a huge if, I'll work with you (read: give you a great deal on a rebuild or on an upgrade to one of our delicious 4.15L build outs).