I'm looking very seriously into the megasquirt package. I'm looking at either running with a 1st gen dizzy (and a 2nd gen coil pack) OR keeping the working CAS. My question is what inputs need to stay on the ECU in order to keep the dynamic timing?

I'd obviously need to keep the pressure sensor, which poses a problem. I at some point will be going blown (either SC--likely since DEZERTE's just arrived in the mail today, or tubo'd). Since I have an N/A ECU, could it still adjsut timing properly?

Even if not, that project is still months (if not over a year away). I'd rather get the megasquirt and timing working for a driveable car in the meantime.

So bottom line, what needs to stay on the ECU for input/outputs to keep dynamic (non limp mode) timing?

S5 GTU n/a

Thanks guys!

Kent

 

bump

 

^ yup

 

dig up the old megasquirt thread. should give you some more info.

 

Yeah i did that, they didn't go into much detail though (yes DETAIL, but not specifics). The FSM doesn't really explain what determines variable ignition, just what trigger's the static timing limp home.

I guess I should figure out what I want to do. I was thinking of going 12a dizzy, in which case I wouldn't even need the ECU. I'd be concerned if the dizzy could handle the retarding if I went blown though (per that SC sitting in the garage now).

Does the 12a distro handle retarding per boost or only per load/vac?

 

Check out www.rotaryshack.com . They offer 12a Turbo dizzy's or i think they modified the 12a dizzy to retard timing.. But a 12a Turbo dizzy will work.

Once you get that MS put on... get a reputable wide band and take it to the dyno.

Justin

 

there were 12a turbos? wow... I learned something to day. I thought the 1st gens were strictly n/a..

 

yeah there were never any 12a turbos in the US.

 

So the ones that rotaryshack makes only keep it from advancing timing? What about retarding?