2G SAFCII tuning ins and outs, Posts for ideas and Options

[justooln2]

any people that know what they are talking about would be more than welcome as far as tuning and setting up the SAFC thanks Don L


Ok here is a run down on my hop ups.
Car is Dropped 2”
KYB GR2 shocks
Full set of hard pipe,
Greddy Type S Blow Off Valve
Full 3” A’pex I Turbo back exhaust
B&M Adjustable Fuel pressure regulator
B&M fuel pressure gauge.
Walbro 255 lph fuel pump
Full set of slotted and vented Rotor
Full set of Ceramic pads
Short throw Shifter
Shifter Stabilizer Bushing
Turbo XS dual Stage boost controller
A’pex I SAFC II still tuning with that one..
Custom Propane Injection (controlled on manifold boost pressure)
Removed the air dam in front of the passenger tire and installed a grill mesh

My data logger is on its way still and I have never used one so when that gets here I will probably be posting more questions on that topic too.

Not on the car or not going to go on.
Ceramic coated header it’s a pacesetter but I hope it will last long enough to pay for its self.
I have 2 extra T25s and a T28 for another car

[Mitsu 77]

I VERY hightly recomend the AEM UEGO wideband gaudge type controller. It is very accurate and mounts in a standerd 52mm piller. Using a wide band is the only way to tune. Just ask anyone that has one.

[justooln2]

Ok thanks I have a Palm Pilot on the way and I had planned on getting the Data logger cable and software for it,,, thanks for that remark i will start looking for one now.

[99Spyder]

I VERY hightly recomend the AEM UEGO wideband gaudge type controller. It is very accurate and mounts in a standerd 52mm piller. Using a wide band is the only way to tune. Just ask anyone that has one.

I second that

[justooln2]

They are alittle steep on price,, I am sure they are worth it but damn.. and next do ya just weld on a new bung?? or blank out one of the original O2 seners??

[99Spyder]

If you are running the stock ECU you would have to weld in an additional bung. The AEM wideband only gives a 0-5v signal instead of 0-1v like the stock O2 sensor so you cannot replace one of the existing sensors. If you want to come up off the cash and get an EMS to go with it, you can eliminate one or both of the stock sensors...

[natedogg]

I use the PLXdevices wideband controller. It has both narrowband and wideband outputs so you only need one O2 sensor. Plus its cheaper than the AEM unit. Not knockin the AEM unit, I just prefer the PLX controller.

[Chicago_DSM]

SAFC tuning? For what? Stock injectors, what kinda tuning do you expect?

No use to tuning without a logger and upgraded injectors at least! ....For some other helpful hints:

- Gr2 shocks and 2" lowering springs = disaster waiting to happen
-Not sure what your goals are, but I don't want you to get your hopes up with this T25 you got on now (im assuming)...Might as well pick up a 14b setup if your gonna rush into tuning and upping the boost

[ncgalant]

Tuning is pretty simple with a SAFC and a 2g other than you can't see knock. The first thing you will do is to set the low so that your long and short fuel trims add up to 0. Just cruise in 4th and do each point from 1000-3500.
Set your low throttle point at 30 and your high at 70-80.

Now go do a 3rd gear pull. You want to see it through the whole rev range wide open. Start at 1000, go to 7000. For this watch RPM, timing, and O2 ONLY. OBD2 is slow and you don't want to pull to many points at a time. Your timing should start high, then fall way down as boost comes on. At the point where you have full boost, your timing will bottom out. From that point on you should gain 1-2 degrees of timing for every 1000 RPMs. If you see the timing drop down a bit as the RPMs go up, this may be from knock timing retard. First try adding 2-3% at that point. If that makes it worse, then go the other direction. With each run of corrections you should see the same or more timing for each RPM. If you see less than the last run, then your last correction was in error.

If you need a hand with it, I'd be happy to lend it.

[ncgalant]

One other thing I forgot to mention. Before you start any kind of tuning, make sure your car is in good working order. Put in new spark plugs(NGK BPR7ES), check for and fix all boost leaks, and make sure your o2 sensor is working properly(for part throttle tuning)

[Chicago_DSM]

Good advice NC, but once again, no use for re-doing your stock low throttle tuning with the stock injectors; the stock fuel/timing maps were made for stock injectors...It's only worth it to change it when a larger fuel setup comes into play...

As far as logging he was dead on, altho don't start at 1000rpm...Nor can you take 3rd gear that low, I know my car will want to stall out once it gets below 2k...

[justooln2]

SAFC tuning? For what? Stock injectors, what kinda tuning do you expect?



- Gr2 shocks and 2" lowering springs = disaster waiting to happen
-Not sure what your goals are, but I don't want you to get your hopes up with this T25 you got on now (im assuming)...

Ok I am still running stock injectors will change when i get to it. the is a T25 on now with a Big T28 and header on the way. the ECU is stock till next month. what kind of goal am i looking for. I will let you know when i get there. I have already seen a good improvement on what i have done.. as far as my set up changed a few things fixed a few things and what not.. just trying to use the SAFC II to its full potential..

[justooln2]

make sure your car is in good working order. Put in new spark plugs(NGK BPR7ES), check for and fix all boost leaks, and make sure your o2 sensor is working properly(for part throttle tuning)

I have the Iridium plugs not sure if i am going to keep them yet.. No leaks I corrected the one i had on the damn F/P Reg POS B&M.. o2 Sensors are good but i am running a test pipe so the back one is kinda useles..

[justooln2]

Tuning is pretty simple with a SAFC and a 2g other than you can't see knock.

I have a knock display on this SAFCII,, i had to set it up durring initial set up..

And ya I would be glad to have any help from someone who has already been through the ropes with this thing.. like i said i am still figuring it out myself..