General TMO Timing Accuracy

[imog_carslinger]

1. I understand that the base timing on the 1g is 5 degrees advance. When I look at my tmo datalogger and it shows a 25 degree advance is this the true timing or is it 25 less the 5 base so real accual timing is 20?

2. With the greddy emanage (piggy back timing control) if I alter the timing by -5 degrees will the show a net result on the logger or am I to subtract from the number shown. (ie, 25 shown less 5 for emanage would net 20, or In the other circumstance 25 less 5 for base less 5 for emange nets 15?

Thanks for the Response

 

[slowAWDTSi]

Well At idle it sould be around 5 deg BTDC stick a timing light on the motor and see what you are getting. Not sure if 2gs have timing marks but if its a 1g they are on the timing belt cover by the crank.
I think if you had 25 deg BTDC at idle it would studder and misfire like a beotch. Look at your greddy it should tell you what your timing is doing. I use the ignition correction map to play with my timing a little on my e-manage. It works great. Thats actually how i melted a piston on my stock motor. (ALWAYS USE A LOGGER TOOL) when tuning the timing.
But from what you said it sounds like your logger is a little off.

 

[GunnerTSi]

I'm not sure how the E-manage percieves the amount of timing, but the TMO, pocketlogger, tunerstein and the like log only the computer controlled timing advance. The number you see is independant of the base timing. So, take whatever the logger is telling you, and add whatever base timing you're running and you will have your total timing advance.

 

[carslinger]

So just to clarify..... At WOT if I see 25, It is really 25 plus the base 5? Then the total timing would be 30?

 

[Nos~4G63]

25advance at WOT is alot of timing!

I tihnk you have the correct idea add base to advance=total engine timing.

 

[redrkt]

Adjusting the base timing with the cas will not change the reported timing on the logger. The 1g ecu calculates ignition timing with the assumption that the base timing is set to 5*BTDC. So, if you have 25* at wot on the logger with your base timing set to 5*BTDC, then 25* of advance is your true timing. If you have 25* at wot on the logger with your base timing set to 10* BTDC, then your true timing is 30*, because you have to add the additional 5* of base timing. If you have your base timing set at 0*BTDC and 25* on the logger at wot, your true advance would be 20*.

 

[antero]

Just to clarify, whatever timing changes you make on the Emanage will not be reflected in your datalogger.