Let's Talk Timing Maps

[mb3000]

So, now that a large amount of owners have timing control via the Chrome ECU, I'm interested to see what everyone's running.

In anticipation of receiving and installing my Chrome ECU I played around with the factory map a little bit. Added a little bit in some areas, and took some away in others. Basically tried to smooth it out a little bit. Still getting used to the ROM map parameters, in comparison to AEM Should be a good enough starting point for my basic TD04 setup.

[NOMIEZVR4]

Here is mine..just added 2 degrees in the 5500 range otherwise stock. I'm running e85 however and a hi 11's low 12 AFR

[J. Fast]

Hrmmm, okay. I'll play. How about we post them 3-D too! Possibly? When I get a min I'll grab a couple off my EMS lappy.

[NOMIEZVR4]

How do we post the map in 3d from ecuflash?

[mb3000]

Just click the "View" tab. This graph is so small however I found it useless. Don't know if you can enlarge it or not...

[NOMIEZVR4]

yeah..i saw that...looked pretty useless

[mb3000]

It is. I found it best to export the data into Excel and work on it there. In AEM the graph was just about all I used. Set your timing where you want it to be under WOT, then switch to graph and just smooth out everything else. Doesn't matter what the value is as long as it's smooth.

Another thing I noticed initially was that the ROM factory map was very jagged. This IMO is decieving because in comparison to the typical AEM, there are fewer RPM break points, so it actually helps the smoothing a lot.

[Toni]

Different engine/turbo/boost configs will certainly affect how these timing charts look. Also, if you use a gm sensor with a translator, your load numbers may be shifted quite a bit.

[HLxDrummer]

My plan is to do pulls from 6 PSI to 15 PSI in like 2 psi increments. Keep bumping timing until I hit knock then back it off 2 degrees. Maybe back it off a little more at peak torque. Hopefully I can add in quite a bit at higher RPMs to make up for the boost drop off with 9Bs.

I ran out of time last time I was tuning so I just did 15 PSI low 11's AFR and bumped it up 2 degrees in a few spots (I tried 4 and had no knock so figured 2 degrees was safe on pump).

I would love to do virtual dyno but my tuning laptop is slow as shit and can't run those programs

Should be a good thread! Make sure you post mods and what gas your running.

[kywhitelightning]

Different engine/turbo/boost configs will certainly affect how these timing charts look. Also, if you use a gm sensor with a translator, your load numbers may be shifted quite a bit.

Zeroing the translator and relying on the flash for tuning will give good load nombers. Unless you max the load calculation in the ecu for the programmed MAF size.

Jeff