chip or safc?

[Fly_With_Sky]

so anyhting over 7-8psi and you had fuel cut 25t_sedan? Is it auto or manual?

If so, im am in the same position now as anything over 8psi and i got fuel cut. So, your tuner couldnt get the safc to help with the fuel cut at 9psi by bending the afm voltage...

how much did the hks fcd cost as when i get my safc installed if it experiences fuel cut still at my max boost of 10psi then i will be getting the hks fcd as well...thanks

[25t_sedan]

ok....the timing was adjusted via CAS and Dyno.

Basically as far as i remember and i dont exactly know if this is correct as i may have forgotten details but my tuner explained everything to me very clearly but that was like 6 months ago so here we go.

As far as i understand....when u put the SAFC in and try bending AFM voltages it alters the voltage going to the ecu. So (just as an example) say your AFM was at 3 volts without the SAFC running 7 psi. Then you do an adjustment on your SAFC and it changes that voltage to say 4volts which could be equal to 12psi (what the computer is reading) even tho you are still only boosting 7-8 psi boost which is still fine but then when i tried increasing it any more than that .... the boost would increase by only 1psi but the boost that the comp was reading would be different and it would be supplying way too much fuel and therefore fuelcut.

Another problem that they came across was the FCD and the SAFC are meant to be hooked up to the AFM. When he installed the FCD it didnt do anything and it had the tuner thinking for a few minutes until they figured out that both the FCD and the SAFC were running off the AFM so he had to rewire the FCD to run of the MAP sensor instead.

Like i said i dont know if that stuff that i said above makes sense but my tuner explained this to me in some way like that

The whole tune took 38 runs and total of 5 hours and the whole lot including the price of the FCD cost me $500. Out of that $500.. $250 was for the FCD. (keep in mind that this is NZ $)

By the way my car was an auto which has been converted to manual and is still running the auto ecu......Dont know if this would make any difference...

Basically at the moment im putting out about 190rwkws and at the time that it was 177 my car ran 13.5@170kmph, 60 foot was 2.2.....I was very happy with that time but now it has a bit more power and better tires so that time will drop to a low 13 hopefully a high 12 if the track is prepped for once

Hope this helps.....but just goes to show that the SAFC is definetly not useless

Oh yeah on my dyno it says 9 psi which was the peak boost for that particular run which it saw at 2800 rpm and then it was 8.5 the rest of the way to 7000rpm (redline) (shtty standard turbo and wastegate setup cant hold boost properly )

[PRO_32]

ok the SAFC seems to have advantages for the 33's out there but we all know there ecu's (standard) are a little lack luster at best of times 32 standard ecu's being much friendlier to mod's etc does anyone with 32 and safc have anything to add????