More BISS explanation:
http://vfaq.com/mods/BISS-2G.html

Also the FSM explains it pretty well and is evo specific.

 

I have a good idea for a mod that may be useful but relatively easy to implement. How about one of the leftover fuel and ignition 3D maps be made to only operate when roadspeed is 0km/h and TPS is above a cetain amount? That way a launch anti-lag can be tuned in very easily.

Please don't shoot me if this has already been discussed. I have not been following the Tephra-mod discussion.... what with no 80700010 support ;-)

 

Actually sounds like a really good idea.

 

hrmmm that could be fun.

So
If (speed <= X) AND (TPS > Y) then set the fuel+ignition maps to something else

X and Y can be customisable

Would it be ok if it was enabled for both altmaps and normal maps (or would you ONLY want it on altmaps)

 

If used as a launch map then it would great to have it enabled for both maps...

 

Give me some good defaults for speed/tps threshold

speed <= 5km/h and (tps >= 40 and tps <= 60)?

that way if you press tps=100% you get the regular map...

 

As soon as you excede the road speed or tps falls below the set amount then it reverts to the normal maps.

eg. Speed <4km/h AND RPM >3000 AND TPS>40% then use launch maps. You dont really need a <TPS setting because this will all only work while stationary, and most will want to leave the line with WOT and not have to concentrate on a band to keep the TPS within.

So, if you are sitting still and you open the throttle enough it activates the launch maps. Let go of the clutch (or brake for us autos) and as soon as the car starts moving it reverts to the normal maps. The reason for the TPS is so that you can free-rev the motor normally when at idle, so it does not upset any startup or general checks we need to do with revving the motor. Only if you crack it open will it activate the antilag.

You could implement this with the clutch switch too. If clutch switch is on then use the second maps, then you can do full throttle shifts without cutting out the motor. You can throw in the fuel and retard it in the shift areas of the launch map. If so, then if Clutch Switch = On and TPS>80% then activate.

The benefit of this is that we can tune everywhere in the 3D table while we are in antilag mode. Not just a general trim. Having things adjustable can mean we can dial in the road speed setting with available traction. RPM to allow normal operation at low speed, and TPS to decide how easy to activate it.

 

well forget about speed:

If (CLUTCH DOWN) AND (TPS > 40) then LAUNCHMAPS...

 

Not all of us have clutches :-)



You could also look at using the map-to-map interpolation function so we could feed in the normal map rather than a sudden switch.

 

Love that idea Mattjin

But another idea on how to work it (not sure if this is do-able) but not everyone has the clutch switch either.

So how about if speed = <4kph / mph, TPS >40 and LOAD = >20 (most evo's seem to idle around 30 load ???) then Launch Maps ???

That way you shouldn't get map switching mixed up, as they only works with ignition on and engine off ?

 

Yes, we need it to work off of speed and not the clutch switch.

 

The Load will come with the TPS. I would generally avoid Load as the switch because it will be more inconsistent and harder to differentiate for a driver sitting on the start line. It is easier to know that if you are sitting still and you get more than half throttle it will work.

I would only suggest to the clutch switch for NLTS function. I have that function already, being an auto, so this implementation would be up to the 3-pedal guys. Trying to switch with Load once mobile is near impossible because the point of anti-lag is to produce the load but not produce the power.

 

But most evo's seem to idle at around 30 load, so if it's set to a minimum of 20 load, there is no chance of it interfeering with the map switching routine, that is all I was thinking.

Like you say ALS increases load, so you will be over 20 load anyway

 

Load is bad. Its not instant.

TPS greater than 50%, RPM greater than 4000, clutch in, and VSS less than 2mph. That is how I had my DSM set up when I ran code to retard the ignition to -10deg for "antilag".

 

Can we just do a static timing value? Why do we have to have an entire map that takes up space for all that RPM/Load values when they will only be used launching and one point?

Tephra, can you set a static timing value if the above conditions that Dan laid out are met?

~Zach