I hope he isnt running an FMU at all.

 

Me too. But I don't see how else he would run rich if his engine is tuned for higher boost. With a properly tuned super AFC or aftermarket ECU he shouldn't have those problems.

 

what a/f ratio would you call rich? i wouldn't run it any leaner then 12.0 to 1 above 4000rpm. make sure you can see a nice black smoke from its asshole. if you aren't seeing black smoke fromt the cars anal cavity, you are too lean for a turbo car on street gas.
shaun
"oh, i see" said the blind man.

 

1 Bar, ~ 14.7 psi with a 12:1 FMU = 176 psi fuel pressure....haha, i hope its not an FMU..

 

My car is tuned for a higher boost. Boost is not totally realitive to fuel...your actual HP is what counts when you are looking at fuel going in. My car right now was tuned at a dif boost than I am running on the street. Therefore my car is a bit rich...I would just compensate it a little and change it for the boost I am running on the street. But I do run the other boost sometimes and I would rather be rich on the street and have my car tuned for the optimal HP at my higher boost setting and keep it that way. Why mess up a tuned car.

My car has plenty of black smoke. I have a wideband o2 sensor. So the car doesnt lean out, well if it did I would let off...just right now the car seems to be at about 9.5:1-10.5:1 a/f at one bar. Higher boost leans it out to about my 12:1 sometimes 12.5:1

 

WOW!!

 

turbo hatchy - you must be tuning your fuel with a S-AFC then, right? You basically increase/decrease the fuel by a percentage at specific engine speeds, right? I was originally thinking you had an engine management system or reprogrammed ECU, which control your injectors according to a 16x16 fuel map.

I see what you mean, varying the boost on a S-AFC tuned engine would change the A/F ratio at different boost levels. However, with an ECU, the computer bases the injector pulse width not only on engine speed, but MAP or the MAF signal as well.

 

so....what you are saying is that the ecu fondles the engine until black smoke emits from the car's sweetest nector, that is its asshole!
btw, its saturday night! where is everyone racing tonight?
shaun

 

Roanoke. I'll see you out on Williamson.

 

Yep...exactly. Its amazing what an SAFC can do.