easy anti-lag system

dennis spoolboy at autospeed.com
Thu May 18 03:30:10 GMT 2000


Hello world! ;)

I'm asking for help, suggestions, and etc. on how to design an anti-lag system for my car. 

I don't really want to stick anything in the exhaust manifold, like an additional injector, and air supply, or a spark plug. I want this to be a logic type thing only. 

I have done a few minor experiments and found that with ignition timing set 35degATDC, I make 1psi of boost at idle. At 2000rpm, I make about 11psi, where my wastegate is set to open.

I want this to work on deceleration also, similar to the systems on rally cars.

My main problem so far, is how to delay the ignition signal that fires the coil, 47degs of crank rotation.
(stock timing is 12deg btcd)

This car is a FWD dodge turbo that uses a hall effect sensor to trigger the ignition. The computer then grounds the ignition coil to fire it. The computer advances and retards timing some depending on other sensor variables. 

I am going to use a simple comparator or two on the TPS sensor to enable this function, with a cabin mounted switch to "arm" it.

I would just buy an MSD or something to retard the timing, but they only retard a total of 20deg for their best module, and as I said, I need 47deg of retard.

I will also probably send the MAP sensor signal wire on this car a voltage that corresponds to more fuel need, so that it will increase injector open time so I get a richer mix to help "bang" up the turbine.

Any thoughts are appreciated. 

TIA

Dennis

PS-how do I get off of digest mode, and get individual e-mails?

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