MoTeC Global Forum

hi

i have motec m800

And I want to I know how up timing or down timing ?

Hi,
Up or down what? Timing of what?

And reading various manuals and seminar notes are a good starting point.

Angelo

Dear
please clarify your ask...

I think what he meant is either advancing or retarding the timing.

Seek professional hep.

Yes, I mean this site you mr2andy

Dear
Knowing how to adjust the timing depend on your experience in tuning, so need the knock detector to hear or see the knocking..... in the timing tuning section you must increase or decrease the timing degree carefully to have a good torque without knocking.
Regards

The question of how to add or retard advance is really either a question of how to do it in the s/w or how to do it in theory/practice

My understanding:
Is that the detonation tends to become more probable with increasing advance.
Also the torque comes up fast as the advance is added but then hits a plateau. As even more advance is added the torque does not increase too much - but the cylinder head temp increases and detonation probability increases.
Also with too much advance the EGT tends to decrease as more energy is getting soaked into the head and piston crown with too much advance - resulting in less heat present in the exhaust.

I guess you either need:
1) a knock sensor
2) an EGT sensor
3) A dyno and not go overly aggressive on the ignition advance...

Or some combination of the 3 options.

towaim wrote:Yes, I mean this site you mr2andy

Make Professional Tuners have their jobs, and the others have a good mapped engines that will not explode after few kms.
Everyone is happy.