How many degrees advance - change in RON
Discussion
GreenV8S said:
Pigeon said:
I once experimented with attaching strain gauges to the head of my MZ to see if I could detect the deformation due to combustion pressure and use that as feedback to adjust the ignition timing to give the pressure peak at 15 deg ATDC. Unfortunately I couldn't detect a thing...
You could put a pressure transducer inside the chamber, but you would need very fast monitoring to get the timing accurately enough. Ion detection seems to be the fashionable way to do this now.Ion detection might be worth looking into though...
MBT does not, and never has/will stood for Maximum Best Torque. Anyone who says it does, post-graduate or not, is an imbecile.
MBT = Minimum Advance for Best Torque. Always has, always will.
Volatility has nothing to do with how it combusts
In the case of this thread, the timing should be backed off by a couple of degrees (from 12° to 10° or thereabouts, but it would probably be fine at 12 anyway (as manufacturers took into account fuel MON/RON availability.
MBT = Minimum Advance for Best Torque. Always has, always will.
Volatility has nothing to do with how it combusts
In the case of this thread, the timing should be backed off by a couple of degrees (from 12° to 10° or thereabouts, but it would probably be fine at 12 anyway (as manufacturers took into account fuel MON/RON availability.
Sorry I didnt realise than an anonymous internet poster knows more than an MIT professor in advanced automotive engineering.
I guess we should all throw the text books out and listen to people on the internet.
Its also strange that a search on google returns 176,000 hits for "Maximum brake torque" and universities publish papers on the topic..
http://www.essays.se/essay/eecfd0564a/
But im sure you know best.
http://www.google.co.uk/search?q=MBT+maximum+brake...
I guess we should all throw the text books out and listen to people on the internet.
Its also strange that a search on google returns 176,000 hits for "Maximum brake torque" and universities publish papers on the topic..
http://www.essays.se/essay/eecfd0564a/
But im sure you know best.
http://www.google.co.uk/search?q=MBT+maximum+brake...
Edited by ringram on Wednesday 19th December 20:22
tristancliffe said:
Volatility has nothing to do with how it combusts
Actually it does. In so far that its required to exist in the correct amount for the fuel to burn at all. A more vaporised mixture will burn more completely than one that has not. Agreed its not directly related to octane, but then I was discussing a wide range of topics including cam timing etc.
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