Drop Timing Compensation B to all 0's?

[Deer Killer]

Who's done it? Any reason not to?

[NSFW]

Under what conditions does the ECU use values from A vs. B?

[Deer Killer]

Only information I could find on it

http://www.legacygt.com/forums/showpost.php?p=1555282&postcount=30

 

My only thought is that might be addition knock protection in the most knock prone area, but with the cap of 2.8 load, it's just useless.

[LittleBlueGT]

I dropped mine to all 0s.

 

In many of my logs you could see at switch from on to off (obvious by a sudden drop of 3 degress in timing) and it was annoying.

 

MickeyD2005 can tell you more I am sure.

[Deer Killer]

Are those numbers exact? Because as I compare maps, I see that people interpolate over the timing without regard to this 3 degrees.

[LittleBlueGT]

Are those numbers exact? Because as I compare maps, I see that people interpolate over the timing without regard to this 3 degrees.

 

I don't understand what you mean by "exact".

[NSFW]

Only information I could find on it

http://www.legacygt.com/forums/showpost.php?p=1555282&postcount=30

 

My only thought is that might be addition knock protection in the most knock prone area, but with the cap of 2.8 load, it's just useless.

 

Interesting, thanks for the link.

[Deer Killer]

I don't understand what you mean by "exact".

 

2000-3500rpms, 2.0-2.8 load

[2005garnetGT]

so, basically if a 5EAT is lugging it in 5th?

 

I need to look into this sawtooth timing effect more, I think I've experienced it when I had to use 91 octane gas

[Deer Killer]

stock cars are in that region all the time, 2000+ rpms is _not_ lugging. It makes sense for additional knock protection stock since you won't really go over a 2.5 load. But stage 2+, you've easily exceeded 2.8, so what's the point, other than really rough running at part throttle? Might as well go much easier on the timing.

 

 

My theory is that the table is flat because there is no post-TMIC temp sensor. If there was, that table would index again TMIC outlet temp. IMHO.

[LittleBlueGT]

My theory is that the table is flat because there is no post-TMIC temp sensor. If there was, that table would index again TMIC outlet temp. IMHO.

 

I actually agree with your theory.

[2005garnetGT]

thats where I get the rough running, from around 40%-70% throttle.. usually I just goose it to get the trans to kick down so I'm not in that speed/load range.

[Infamous1]

Bump for the noob tuners....