Low Impedance
15+ Year Contributor
- 166
- 2
- May 19, 2006
-
Cleveland,
Ohio
First off, the car this is for is not the main one in my profile and NOT going to be used for drag racing. So normal forms of this arent going to work, like the built in one on the DSMlink or the "no-lift-to-shift". The car is a 1991 Eagle Talon TSi AWD 5-spd. Factory 2.0L top and bottom.
Basically the car is a very amauter level rally car. I have to run alot of factory items, but the level i am at is not really competitive and more geared towards "fun". Being that i can never leave good enough alone, is started looking into how i could make the experience a little nicer seeing that constantly varying the throttle can cause some repsonse issues with a turbocharger.
So i read about how ALS (anit-lag system) works. The therory is pretty start forward. Cause some form of combustion cycle INSDE the turbo manifold thus spinning the crap out of the turbo. Furthur reading let me see that retarding the timing (alot) while adding a degree of fuel will cause the combustion late enough where it is basically happening in the turbo manifold.
Being that timing and fuel control are standards for a DSMlink, which is what im thinking about using, i dont see why i could create an effective antilag based on throttle postion. This whole process is obvious bad on turbos, turbo manifolds and wastegates. That is why i want to be able to turn the antilag maps on and off. So under normal conditions i dont sound like hell driving down the road and not melting things. Problem is that switching maps on a dsmlink requires the laptop to be used. I am actually half tempted to use a megasquirt for this. In part because a friend is an EE and has experience using the main chip the MS uses for computation.
So here is what i propose:
1. the main variable is going to be throttle postion. When the system is working there basically will be boost at idle.
2. the actual idle of the car is going to be higher (2000+) RPMs. The reason being that the ECU normally advances timing to catch the idle to keep the car from falling on its face. Basically, im going to counter this by rasing the idle much higer.
3. Some form of switchablitly between, "off" (normal map without antilag), "1" mild antilag and "2" heavy antilag. This way there is easier adjsutability pending driving conditions.
4. as the throttle postion changes to a lesser percentage, i want the timing and fuel to adjust accordingly moving the combustion process farther into the manifold. For rally use, lifting the throttle (which for this will surely generate power loss) isnt a bad thing. Then as the throttle postion increases, the timing is added and again the fuel trim changes to bring it back to a proper power band.
thoughts?
Basically the car is a very amauter level rally car. I have to run alot of factory items, but the level i am at is not really competitive and more geared towards "fun". Being that i can never leave good enough alone, is started looking into how i could make the experience a little nicer seeing that constantly varying the throttle can cause some repsonse issues with a turbocharger.
So i read about how ALS (anit-lag system) works. The therory is pretty start forward. Cause some form of combustion cycle INSDE the turbo manifold thus spinning the crap out of the turbo. Furthur reading let me see that retarding the timing (alot) while adding a degree of fuel will cause the combustion late enough where it is basically happening in the turbo manifold.
Being that timing and fuel control are standards for a DSMlink, which is what im thinking about using, i dont see why i could create an effective antilag based on throttle postion. This whole process is obvious bad on turbos, turbo manifolds and wastegates. That is why i want to be able to turn the antilag maps on and off. So under normal conditions i dont sound like hell driving down the road and not melting things. Problem is that switching maps on a dsmlink requires the laptop to be used. I am actually half tempted to use a megasquirt for this. In part because a friend is an EE and has experience using the main chip the MS uses for computation.
So here is what i propose:
1. the main variable is going to be throttle postion. When the system is working there basically will be boost at idle.
2. the actual idle of the car is going to be higher (2000+) RPMs. The reason being that the ECU normally advances timing to catch the idle to keep the car from falling on its face. Basically, im going to counter this by rasing the idle much higer.
3. Some form of switchablitly between, "off" (normal map without antilag), "1" mild antilag and "2" heavy antilag. This way there is easier adjsutability pending driving conditions.
4. as the throttle postion changes to a lesser percentage, i want the timing and fuel to adjust accordingly moving the combustion process farther into the manifold. For rally use, lifting the throttle (which for this will surely generate power loss) isnt a bad thing. Then as the throttle postion increases, the timing is added and again the fuel trim changes to bring it back to a proper power band.
thoughts?
