Hey guys,

there's a really good thread in this forum about "How to tune an Evo".
Unfortunately I don't own an Evo...so I'm looking for someone who helps me with the topic for an NA lancer.

What map is the best to start AFR?
When do you touch the timing and in which intersection of load and rpm should be the changes.
Also I want to know what to do with the Mivec maps...where to increase/decrease the values

I'm really interested in this topic.

Thanx!

Michael

 

http://forums.openecu.org/index.php?...85b5aa639acab9

All is covered there

 

Hi M@verik,

Can you please be a little more precise (It's just the index page).
I'm already on this forum.
I'm searching for a topic about our lancer with maybe some direct hints what to take care of.
Thank you.

Michael

 

The users section has everything u need. However I suggest u read up on how to tune an evo as it is the same principle. Once you know what everything is, how it functions etc. then and only then should u start tuning. I had quite a few nice pdf's to read up on the subject specially relating to the evo x (similar tuning to the regular lancer) and overall how to tune, but I forgot where they are lol. Also I can send u my tune so u can see the values im working with.

 

You're totally right!
Someone who wants to tune is car has to know what he's doing.
At the moment I just want to learn to understand what can be done.
I'll continue to read the article about the evo.
A compareable tune would be fine...or just printscreens of tables.
do you own the 2.0?
I own the EDM 1.8 which is just a reduced 2.0 one.

I have a little edited file of an tuner (the file doesn't work well atm) where I already can see changes.

But this is the first thing where I stop... he edited for example the timing and reduced the values for load from 0-100 from 500-3500 and increased the figure above 3500.
-> why?
I many have such basically questions.

The other is... why is the AFR designed to be richer in high load an rpm and 14,7 while decreasing them.

afaik a richer mixture can take earlier timing without knock. but what is the benefit of doing this?

Michael

 

Yeah ive got the 2 liter. Ok im not an expert, but ill try answer a few questions.

For instance about the AFR. I am personally running 14.7 at low rpm low load to a maximum of 11.1 at high rpm high load. This is because the lower the ratio, the more oxygen is present at each cycle which equates to easier detonation and more power. The reason I can run this without any problems is I use high octane fuel with an occasional octane booster just to keep it safe. If u read the map from ur stock lancer u will see how high the values are. The lancer had a very conservative tune so it could use very poor fuel (91 ron) and in hot climates without detonating. Just by leaning out the mixture and using higher octane fuel u can see a nice power increase which is also pretty safe.

As for the timing, retarding beyond stock levels can be really bad since they usually come a little retarded as is and can cause valve and piston damage. Advancing it can also be just as bad. The point here is to find the sweet spot. Usually the best is to advance it until it starts to ping and then retard it 2 or 3 degrees for safety.

I hope that helped a bit lol

 

I'm running for normal on 98-100 Octane fuel.
You can buy this at almost every gas station in my country.

The point that I don't understand is:
"Why is a 14,7 at high rpm and high load too dangerous."
I read that 12,5 would be best for power and
14,7 would be best for emissions
but both can not be used in high rpm/load
so it's not all about rich or lean..it also depend where yo do what.

does the timing also affect the valves so that the piston can hit the valves...or only the spark?

retarding is when it fires near the TDC and afterwards (high load & low rpm)
and it is more advanced in low load & high rpm
and my tuner's file has increased retarding and advancing.

Stock timing:
http://img690.imageshack.us/img690/7...o20110612u.png
Edited timing:
http://img836.imageshack.us/img836/7...o20110612u.png

stock fuel:
http://img651.imageshack.us/img651/7...o20110612u.png
Edited fuel:
http://img815.imageshack.us/img815/7...o20110612u.png

(Tell me if it gets too annoying for you...I have got too many questions because I'm really interested in this )

Michael

 

I've been researching this very subject for 8 months now.
So far I have learned some of:
reverse engineering the ROM
setting up a good logging system
how the various parts work at different RPM ranges
learning the math behind how engines work, airflow, pulse wave timing, and burn mechanics
measuring parts & calculating limits
ram charging
probably other things that just don't come to mind at the moment.

I still don't think I know enough to start tuning yet, but I am a lot closer than when I started out. At the least it has let me start developing theories to try out when I have all the tables accessible. I'm sure what I'm learning is probably overkill to some degree, but I'd like to design some custom parts as well.


My best suggestion is to read, a lot. Research the parts you don't understand and eventually you'll get it. I guess the other option is to go to school for it.