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So, after all of the Injen testing was done at the 8/14 HFXA meet at Dave's, one of our new members, phamgiaj (we were also joined by BMWslayer. BOTH had black RWD FXs) wanted me to do G-Tech runs in his FX just for kicks. He DID request that I attempt to power brake launch on some of the runs (hold the brake and bring the RPMs up, then drop the brake) to see what, if anything, the ECU does. It had previously been discovered on the 350Z that if the ECU detected that the gas and brake were applied at the same time, it would cut power and that the work-around to this was to pull the stop lamp fuse. Anyway, here are the runs:
Stock RWD FX35 (1/4 tank):
-manual mode, standing start (release brake and floor gas)
1. 6.72
2. 6.83
3. 6.85
-manual mode power braking to 2800 RPM (it stopped there and wouldn't rev further with the brake applied):
1. 6.69
2. 6.68
-auto mode, standing start:
1. 6.95
-auto mode, power braking
1. 6.80
I've previously mentioned that I always get better results by shifting in manual mode (as shown here), but wanted to be thourough. At any rate, by power braking, the 0-60 time was reduces by .14 sec. :shock:
Now, apparently the ECU DOES intervene in that it won't allow it to rev past 2800 RPM (which happens to be the best RPM to launch from; that's where you start to hit the meat of the torque in the powerband), but it apparently DOES NOT cut power.
I'm not sure I would personally want to do this on a daily basis, but 12secZ of My350Z.com braket raced his HEAVILY modded and supercharged automatic 350Z (with no tranny mods) says he does it all the time (he has to pull his brake light fuse) and that the tranny can easliy handle it.
Interesting stuff... SO, if you happen to be sitting at a stoplight next to a car you want to race and think you might need that extra tenth and a half, go for it!
Stock RWD FX35 (1/4 tank):
-manual mode, standing start (release brake and floor gas)
1. 6.72
2. 6.83
3. 6.85
-manual mode power braking to 2800 RPM (it stopped there and wouldn't rev further with the brake applied):
1. 6.69
2. 6.68
-auto mode, standing start:
1. 6.95
-auto mode, power braking
1. 6.80
I've previously mentioned that I always get better results by shifting in manual mode (as shown here), but wanted to be thourough. At any rate, by power braking, the 0-60 time was reduces by .14 sec. :shock:
Now, apparently the ECU DOES intervene in that it won't allow it to rev past 2800 RPM (which happens to be the best RPM to launch from; that's where you start to hit the meat of the torque in the powerband), but it apparently DOES NOT cut power.
I'm not sure I would personally want to do this on a daily basis, but 12secZ of My350Z.com braket raced his HEAVILY modded and supercharged automatic 350Z (with no tranny mods) says he does it all the time (he has to pull his brake light fuse) and that the tranny can easliy handle it.
Interesting stuff... SO, if you happen to be sitting at a stoplight next to a car you want to race and think you might need that extra tenth and a half, go for it!