Overboost Throttle Cut (TC) Stage 2+ GIAC-X New Software checkout part II..
08-05-2005, 06:19 PM
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Overboost Throttle Cut (TC) Stage 2+ GIAC-X New Software checkout part II..
<center><img src="http://pictureposter.audiworld.com/44443/bej_l308x_giac-x_hp_curve_vs_previous_giac-x_a_adj.jpg"></center><p>Here are some new plots as promised for Stage 2+ on the same road showing new GIAC-X software (L308x) removing TC from overboost. The blue curve was a run with previous version of GIAC-X with high TC and the red run is previous version of GIAC-X with moderate TC. The black curve is new L308x software. I do not know the firmware build # of the previous version.
There is no longer any throttle cut around 4000 RPM. The average HP over the powerband is about the same for moderate TC and much better than high TC. The peak TQ is about the same. I think that this looks like a very attractive alternative to using parallel MBC with GIAC-X for Stages 1-2+.
Bruce
There is no longer any throttle cut around 4000 RPM. The average HP over the powerband is about the same for moderate TC and much better than high TC. The peak TQ is about the same. I think that this looks like a very attractive alternative to using parallel MBC with GIAC-X for Stages 1-2+.
Bruce
08-05-2005, 06:29 PM
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Very smooth but powerfull. The "jolts" as you go through the torque peaks..
and valleys are gone. Throttle modulation is also improved (i.e. part throttle response).
Bruce
Bruce
08-05-2005, 06:43 PM
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Still get 'holy crap' when you go WOT. Better for me, because I was seeing 22 psi boost spikes on.
<center><img src="http://pictureposter.audiworld.com/44443/giac-x_boost_log_041705.jpg"></center><p>my K03's with old software (see PIC).
Bruce
Bruce
08-05-2005, 07:00 PM
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Which version software did you get? Going from stock to chip is like sherminator said..
'holy crap'. Make sure that you replace BPV's and install Bi-pipe (flame if you wish) to protect turbos at higher boost.
Bruce
Bruce
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08-05-2005, 07:13 PM
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To me they look about the same speed, so stick to what you've got. However,,
If you really want to know, find someone in your area (local forum) that you can switch with to check it out. This is how I got to check out GIAC-X on my car when I had an APR ECU...
By the way, I still have both a GIAC and an APR ECU. They are both fun.
Bruce
By the way, I still have both a GIAC and an APR ECU. They are both fun.
Bruce