5 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996TT/GT2 mit Motec - Page 1 - Porsche General - PistonHeads UK
Reported or suspected cause
super unleaded
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause
I thought this may be cause for concern when dealing with suspect super unleaded that a few friends of mine have had problems with.
996TT/GT2 mit Motec - Page 1 - Porsche General - PistonHeads UK
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Leading evidence: 'super unleaded' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'super unleaded' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Use knock control system' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Are you guys able to use a knock control system with the MoTeC ecu?
996TT/GT2 mit Motec - Page 1 - Porsche General - PistonHeads UK
Use motec
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Incidentally, I THINK that Gemballa used Motec on their 2002 "tuner grand-prix" car (GTR750?), so it's not going to be a problem proving the performance of the Motec system.
996TT/GT2 mit Motec - Page 1 - Porsche General - PistonHeads UK
Use super unleaded as a safeguard
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
We can run with exhaust gas temperature compensation (too high = more fuel & less timing), engine temp comp, air temp comp, etc, and we can also map it on premium unleaded first then use super unleaded as a safeguard.
996TT/GT2 mit Motec - Page 1 - Porsche General - PistonHeads UK
Use motec
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Incidentally, I THINK that Gemballa used Motec on their 2002 "tuner grand-prix" car (GTR750?), so it's not going to be a problem proving the performance of the Motec system.
996TT/GT2 mit Motec - Page 1 - Porsche General - PistonHeads UK
Use super unleaded as a safeguard
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
We can run with exhaust gas temperature compensation (too high = more fuel & less timing), engine temp comp, air temp comp, etc, and we can also map it on premium unleaded first then use super unleaded as a safeguard.
996TT/GT2 mit Motec - Page 1 - Porsche General - PistonHeads UK
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T042512Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Are you guys able to use a knock control system with the MoTeC ecu?
I thought this may be cause for concern when dealing with suspect super unleaded that a few friends of mine have had problems with.
IMHO the knock control system is not all it's knocked up to be. As I understand it, all the system does is listen to the engine and compares the noise coming from it with the noise of a pre-programmed standard engine, and any excessive frequencies/amplitudes that are heard are deduced as knock and the timing on the offending cylinder is backed off accordingly. The system is theory is great for a road car, but from what I am lead to believe it has limited use at full power/full load due to the racket that comes from the engine in the first place. The knock sensing side of the ecu is actually as complex as the engine management side, so only the most sophisticated ecu's have the capability to run it effectively.
The M800 does not have knock control, but it is, in theory, possible to put in safeguards to eliminate the need for it. We can run with exhaust gas temperature compensation (too high = more fuel & less timing), engine temp comp, air temp comp, etc, and we can also map it on premium unleaded first then use super unleaded as a safeguard. Finally we can also use wide band Lambda control (which the factory ecu does not have)to ensure ideal fuelling at full throttle, but the bottom line is that it is (in theory) better to have knock control but it is (in practice) not all that good.
We do have access to systems that have self learning knock sensing, but would you purchase an ecu at £5,000 then have to pay another £9,500 for the software to program it? No, neither would I, but if you want me to fit one for you and you are willing pay for it I will. Food for thought
How come I feel like I am digging a hole by starting this thread off?
I talked with Motec UK today and we have hatched a plan to piggyback the M800 ecu onto a stock 996TT wiring loom & ECU so we can properly map all the turbo variants of the 996 with bigger injectors, more boost, free flow exhaust, bigger turbos, etc. We have a customer lined up for the first one, so all interested parties should watch this space.
Incidentally, I THINK that Gemballa used Motec on their 2002 "tuner grand-prix" car (GTR750?), so it's not going to be a problem proving the performance of the Motec system.
This is a source reference. Confirm exact model applicability in the original material.
