Originally Posted by Fino
I'm curious how you got your car to afterfire like that. I have a fully catless 03 WRX that I've been tuning with a tactrix cable. What tables did you mess with to get it to afterfire during shifts or while using a fuel cut rev limiter (2 step)? I don't have an EWG, just a catless STi uppipe and catless downpipe, is it still possible with this setup?
I tuned a 50/50 hybrid BOV so that the spring is very stiff on it. This way it opens only under significant boost (say 7psi +) and will only vent to atmo when blowing off a lot of gas (such as letting off the gas at WOT to shift). This way only under that condition it will throw fireballs and aftefire during shifts.
I also set up a tuning hack to make the exhaust "Gurgle" or have the "Popcorn Popping" like some Mercedes AMG models. This is done by adjusting the timing in the lowest load column (this column is ONLY reached during vacuum, so decel) to anywhere from 5-7. You can retard the timing further to have a full blown explosions out of the exhaust during decel but it's really obnoxious (albeit somewhat funny for a few minutes). It will have the following effect for no other reason than auditory aesthetics but with no negative sideffects:
The really big fireballs are actually from Anti-Lag, it's a very clever hack I've been running for some time safely. The idea behind it is you add a momentary switch wired to a relay that disconnects the IAT lead on the MAF harness to the ECU. This will make Intake Temp read -40 degrees F (which would never happen otherwise) which becomes a tuning trigger to retard timing. Now you can use that to adjust the following things:
Timing Compensation A (IAT) Activation table:
set cells above 4k RPM to +100 in load ranges that anti-lag can hit.
This will be up high to say around 1.2, test it for yourself after it all works.
Note that this will not have a negative effect since the next step only allows the timing to drop to retarded when the switch is toggled.
Timing Compensation A (IAT) table:
Adjust the -40 degree cell to a negative value. Keep playing with it until you reach around -15 to -17 degrees timing, but test it for optimum Anti-Lag boost.
At this point, hitting the switch will retard your timing, and going above 4k RPM will enable Anti-Lag.
This is both a launch control and rolling anti-lag. It works hand in hand with a 2Step Rev Limiter too.