knock while in antilag

[PIMking]

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what am i suppose to do?

 

[1992awdlaser]

Try to add fuel in the antilag settings where it says "enrich fuel by." Try 5%.

 

[PIMking]

Okay that what I was thinking but I wanted to bounce my ideas off of someone else. thank you!

 

[PIMking]

okay another question what should I aim for on my front o2 readings at idle?

 

[1992awdlaser]

At idle the o2 volts should be bouncing around between a really low number and .7x or so. This is from the fuel trims trying to keep the air/fuel ratio around 14.7:1. For idle you just have to pay attention to your stft and ltft lo. Add them together and change the 50hz slider by that amount. The ltft lo should be within 5% of 0. But the max value ltft lo can show when taking fuel away is -4.7%. So if it reads -4.7% it might be even further off. You can also change the trims with deadtime and global.

If you want me to suggest what way to do it go cruise for ten minutes and then let it idle. Start a log while it is at idle. Capture ltft lo and ltft mid. Just rev it to a mafraw reading of about 50hz for a few seconds and then rev it to about 100-150hz for a few seconds.

 

[PIMking]

Okay I have way more to learn that didnt make any sense to me.

It is rich at idle. so I took a ton of fuel away at idle that seemed to help the idle also can you tell that in that log?

I cant drive it at the moment I have the axle problem were the carriage bolts rattled free from the motor so the drivers axle fell out of the tranny. I havent had any way to work on it for the 2 weeks hopefully I can get it fixed tomarrow or tuesday.

 

[1992awdlaser]

Here is a log from when I recently got my car running again. Look at the o2 sensor activity. You can see how it is moving up and down like it is supposed to. Don't pay attention to the wideband readings, there is an exhaust leak messing up the readings.

 

[PIMking]

Okay so just at wot I want it to stay at .9?

 

[1992awdlaser]

Correct.

Take a look at these links to understand better how the fuel trims work and how to adjust them. GMAF Calibration for LTFT
fueltrimupdatepoints [ECMTuning - wiki]

 

[99gst_racer]

There's a thread on the Link boards regarding this same issue. It seems that many guys simply can't always avoid reading knock while using antilag. They did mention that if they ease into the throttle slowly, knock will be less severe.

From personal experience, I read less knock as I added fuel. With 0% enrichment, I would read around 5 degrees. With 10% enrichment, I hardly read more that a degree.

 

[PIMking]

Correct.

Take a look at these links to understand better how the fuel trims work and how to adjust them. GMAF Calibration for LTFT
fueltrimupdatepoints [ECMTuning - wiki]

Looks like I have alot of work to do. To bad not a single perosn in this area have link to help me out. Is that your web page?

 

[1992awdlaser]

No, its another dsmlink user's. His user name is jeffgst. The second one is the dsmlink wiki.

 

[PIMking]

There's a thread on the Link boards regarding this same issue. It seems that many guys simply can't always avoid reading knock while using antilag. They did mention that if they ease into the throttle slowly, knock will be less severe.

From personal experience, I read less knock as I added fuel. With 0% enrichment, I would read around 5 degrees. With 10% enrichment, I hardly read more that a degree.

Thanks, I will try that info. I havent used the LINK boards yet just not comfortable with those boards yet.

 

[JusMX141]

With my buddy's '95 TSi AWD, everytime we enrich the fuel while on AntiLag, the car practically stalls if you let off the gas and try to get back on it....say, if you stage a little early and the other douche you're up against wants to play games- you sort-of back out of it a little. When he comes back on it, the car sounds like it's running on 2 cylinders and it just totally screws up his launch.

I think AntiLag is overkill. It sounds mean, and makes a nice fireshow....but he's getting better launches with the standard 2-step stutter.

 

[PIMking]

No such thing as overkill.

Its the only launch ability that I have and when they do a midnight meyhem they do instant green so it took my 1.8 60' times to 2.2 because I had no idea when they were clicking the lights.

It should help me a ton on the launch.

 

[JusMX141]

Try doing an Anti-Lag launch back-to-back with a standard 2-step stutter.

His best stutter 60ft time is 1.6808, his best Anti-Lag 60ft was around 1.85xx because we couldn't get the car to stop falling on it's face. It would eliminate your knocking issues, as well.

 

[PIMking]

Try doing an Anti-Lag launch back-to-back with a standard 2-step stutter.

How do I do that?

I didnt know that dsmlink has a 2 step and Im kinda confused what a 2 step stutter is.

 

[snowborder714]

To set your 2 step, go to ECU > RPM's. The Launch RPM is your 2 step RPM. Set this to whatever you want to launch at, then push in the clutch and rev. As long as you put the gas down far enough to reach that specific RPM's it'll just bounce off the RPM where you set it. You can put the gas as far down as you want and it'll only go that high.

 

[PIMking]

To set your 2 step, go to ECU > RPM's. The Launch RPM is your 2 step RPM. Set this to whatever you want to launch at, then push in the clutch and rev. As long as you put the gas down far enough to reach that specific RPM's it'll just bounce off the RPM where you set it. You can put the gas as far down as you want and it'll only go that high.

Oh well thats what I was doing. But I also have engauge (sp) antilag.

 

[8urv8]

Ensure that you are engaging the antilag correctly. You don't want to just slam your foot straight down to the floor right away. You'll want to just ease the pedal down. Not super slow but not super fast either. Just play with it to see if that helps any. If I just slam the gas down in my car it will knock like a mofo. When I first got dsmlink, I couldn't figure out how to keep it from knocking when engaging the antilag. Also, the more fuel you add in antilag, the more boost the antilag will generate. Hope this help's.

 

[1992awdlaser]

Oh well thats what I was doing. But I also have engauge (sp) antilag.

Uncheck the enable antilag box and the 2step will go to your 4500rpm setting. The 2step is more than enough for most cars to launch hard.