Hey guys
is it possible to make the car run "richer" with stock ecu?
how would i go about doing this and make the car run "richer"?

 

Just throw on bigger injectors... it'll be so rich it won't even run

If, on the other hand, you want to tune the stock ECU for your particular mods you can either buy a Pettit re-chipped ECU or find a used PFS piggy-back controller.

Or you can replace the stock ECU with a Power FC.

 

The stock FD ecu is not "tunable". If you keep your boost to 10 psi maximum, the stock ecu will be plenty rich, no matter what mods you do.

 

The stock FD ecu is not "tunable". If you keep your boost to 10 psi maximum, the stock ecu will be plenty rich, no matter what mods you do.

+1

Keep it at 10 psi and you will be ok. check out my mods and I am still on the stock ecu. car runs strong and no problems yet.


Jeff

 

do you have air pump out ?

 

Stock cat helps that out quite a bit. even if you run a midpipe with a ported wastegate, I bet the stock ecu would not feed enough fuel even at 10 psi.

I could be wrong and talking out of my *** though.

and to the OP, if you want to run over 10 psi, get a different ECU. simple as that.

 

still have an air pump and a bonez highflow cat

 

Yep. Definitely talking out your *** . I has been well documented that that stock ecu is good up to 10 psi, with any mods. The problem with an open exhaust, is keeping the boost from creeping over 10 psi.

 

I have made over 300 hp (creeping to 11psi) with stock ECU and my air/fuel ratio was still below 10!
This was with all bolt-ons and a FMIC. The problem is not enough fuel but stock ignition timing and as mentioned above creeping to the point where you will get fuel cut.

 

To run richer put a restricter in the return fuel line small enough to up the fuel pressure .You can make it adjustible so you can control the fuel .The same duty cycle ( stock ECU )with higher pressure will give you more fuel .

 

Note that increased fuel pressure will richen the mixture at idle & cruise too.

 

whats the safe afr for an fd3s??
i had a honda and it was 12.8:1
for a turbo honda was 12:1
what about a wankel??