Does the split second box do anything else other than retard timing? Can you adjust A/F ratios in the box.........and will the stock ECU relearn its original settings after a period of time and overide the SS box?

 

So far from what I've seen the stock ECU will not overide the SS box. I have seen 2 G35's tuned with the SS box and the settings are still the same and haven't reset themselves. I know for a fact its a timing control unit and I believe it is a form of fuel control also but not for certain. Check with Zimbo or dollar99 those are the two cars I have personally seen tuned.

 

I don't how how it could be a fuel control because the Vortech uses a Mechanical FMU to increase fuel pressure to the injectors. Maybe it does something similar to the SAFC-II, where it can adjust MAF voltage to increase or decrease injector pulsewidth. Other than that I don't see it.

 

so if the Vortech FMU is mechanical it must read when to increase fuel pressure off the stock MAFS, what happens when the stock ECU relearns and goes back to original settings, wont it run lean?
I heard from a tech that the 350Z has a adaptive learning ECU and it has multiple maps to where it can go to learn its original settings?????......unless the vortech mechanical fmu reads off boost pressure? but it still would be kinda messed up if the MAFS was after the superchager, it seems to me if the 350Z does have a relearning ecu then the MAFS must be located before the supercharger and the Vortech FMU must be based on its own boost and not the 350z MAFS at all.

 

The mechanical FMU adjusts fuel pressure based on boost.

 

THE ati DOES NOT ADJUST ON BOOST RIGHT, JUST OFF THE AEROMOTIVE BOX?

 

The Aeromotive box that comes with the ATI kit adjusts fuel pressure based on boost. It supplies a varying voltage (based on boost) to an aux fuel pump that raises fuel pressure.

 

ISNT THE STOCK ecu GOING TO WANT TO ADD MORE FUEL AS WELL WHEN IT READS THE EXTRA AIR COMING IN, THUS MAKING IT RICH.....and what happens if you have it tuned and leaned out a bit and a month later the ecu releans and goes back to original settings......wont you be lean? Sounds like this could be a BIG problem if infact the stock 350Z ECU has re-learning ability, I have a feeling that is why a few cars have blown up. I heard Vortech kits where very rich when they first where installed, anybody ever go down a month later to see if they did infact lean out a bit due to the ECU going back to original settings? Am I all messed up in my thinking or what??????

 

Rising rate FPR's are the worst possible way to tune any FI system.

 

Man the whole "relearning" thing the ECU does is BS. If that's the case, then I'd be f*cked right now. I ride around with a wideband O2 all day, and any adjustments I made with the DFMU that comes with the ATI kit, and whatever I changed with the SAFC would have gone to sh*t. It hasn't, my #'s are the same and will stay the same, period.

 

how long and how many miles have you put on your car since fuc*king with it? Be honest...

 

In all honesty, about 4200 miles, driving it really hard.

 

your introducing an entirely tandem fuel system into the existing fuel system........the stock ECM "sees" the AFRs with a narrowband..........when your at WOT or anywhere above the point where the MAF goes to max then you're in open loop, and no adaptation will be taking place while in open loop......if the tandem fuel system is set up for a fairly stoich mixture then the narrowband O2's aren't going to be seeing too much more added fuel anyway while in closed loop.......assuming all the other components are working properly

in the stock ECM fuel maps and timing maps there are changes that occur as RPMs rise......the timing changes are the critical ones that will pop your block, but the fuel changes can do it too, if the tandem fuel system is set up initially too lean

the ECM does adapt, if it didn't the SAFC wouldn't work.....it "tricks" the ECM into making the adaptations when you want it to make them

 

From the SplitSec website:


--Steve

 

So the Vortech does come with the Fuel/Timing box?

If so, then awesome. I am used to tuning a Utec on my WRX so this should be almost the same I am guessing. Time to get out the wideband.

 

so zimbo, how is your car running and did you adjust A/F through the split sec box? after driving it for awhile has ur A/F changed at all?

 

As long as the car is fully warmed up and the belts are properly tensioned, the A/F programming seems to not require constant changing unless you make intake or exhaust changes.

My car has been running well... but I decided to add high flow cats and Crawford plenum which I knew would require me to add some more fuel to the R4 maps, which I did. I haven't had time to dial it in really well yet so right now I'm running a bit too rich between 4500 and 6000 rpms.

I'm getting belt squeal (which is normal as the belt expands a bit after initial installation) but it appears that the tensioner is already as tight as it can go so I need to call Vortech.

--Steve