easy anti-lag system

[Chad Clendening]

What year , system ?

I have the spark tables in the 85 turbo done ( and a win32 PC interface), the code in the 86-7 is similiar.

It may be possible to do some in the logic module but the computer spark can only (easily) be retarded to the falling edge of the dist referance
signal.  ( 0 to 10 deg ATDC).  It should be possible to retard this more by turning the distributor and compensating in the
base spark table, ... but it may present starting problems.

There is a pin on the processor ( not connected OR labeled in books) which is only used for a small change when used This could
be re-routed to a spark retard.

Chad


>
> 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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