New VEC timing table

[PowerKraus]

Just a quick update in some revised street gas timing table for my 02 GTS. So far, no problems on pump gas, although I added a little more fuel of 2ms pulses. Low/midrange SOTP is certainly there, even on 100 degree days. I also moved the IAT out of the 'open' box, and into the base of the filter so it measures only the air received by the engine (to lessen the retarding of timing based on IAT readings from a 'heat soaked' engine compartment. Take a look at the graph and have fun.

Rob
2002 GTS - Sewer Pipe Exhaust with VECII Enhancements and Texas Nitrous Technology 'Insurance Policy' !!! Hope to see you on the NORTH end of the tollway

 

[EllowViper]

That's good to see. Nicely graphed. Im not running too much differently with W/M and 5lbs of boost. For whatever reason, the stock timing is very conservative, especially 4-5K.

 

[2001 GTS]

What values are you putting in the vec timing table?

Steve

 

[PowerKraus]

Re: NA VEC Tune

Thanks EllowViper.
To 2001GTS and All.....Here is the detail on my modified ‘advanced’ timing/fueling. Also refer to the updated, attached chart. The chart compares OEM timing to my modified timing. Thank you Sean Roe, OEM values were sourced from Roe Racing’s VECII documentation. Subsequent to my original post, I tweaked the timing a little more , so I attached an updated chart. It is a great NA tune for my purposes, and hopefully others will find it as a reliable setting for more performance. Here are the details of my VEC II settings:

Box Settings: Degrees in loan; % in RPM. I am using the VEC MAP, not the OEM. No particular reason, just happened to be the way I set it up. You can easily set up the same values with the OEM MAP, just set the LOAD tables for WOT, which is essentially no vacuum, or very little. Specifically, set the values in the vacuum tables for the range of -5.00 through 0.00.

IGNITION
Load Table
-5.00 -> 13.00
-2.50 -> 13.00
-0.00 -> 13.00

RPM Table
Rpm %
1500 50
2000 30
2500 22
3000 22
3500 45
4000 66
4500 77
5000 56
5500 56
6000 11


FUEL
Load Table – Per ROE VEC II documentation. The -4.00 settings come into play during deceleration and decrease ‘popping’.
0.00 -> -4.00
0.16 -> -4.00

I added some WOT fuel since I bumped up timing.
-5.00 -> 1.00ms
-2.50 -> 3.00ms
-0.00 -> 3.00ms

RPM Table
Rpm %
1000 33
1500 63
2000 72
2500 56
3000 42
3500 31
4000 50
4500 100
5000 100
5500 100
6000 100
6500 100


Post your comments or questions.
Rob
2002 GTS - Sewer Pipe Exhaust with VECII Enhancements and Texas Nitrous Technology 'Insurance Policy' !!! Hope to see you on the NORTH end of the tollway