the best bet would be a reflash of your target A:F so your computer doesnt try to relearn anymore. Also you can remove the throttle plate cut, and the top speed limiter as well.

Then use an aftermarket EMS, like UTEC, FCON, Haltech etc

 

TS Does more than af target. he alters parameters also. TS should be able to do anything the utec, fcon, haltec, etc can do. The processors or much faster in these car than most stand alones offer. The ECM does not "relearn" because you are puting in the parameters and thats all the ecm Knows. At this point the ecm has no preveous records of how it should have been from factory.

 

have a G35 coupe 5AT with a Greddy TT kit and reflash done by Technosquare to go along with my mods. The car drives fine.

But I was just wondering if I could add a piggyback ecu such as an Greddy Emanage or UTEC to fine tune the A/F ratios?

Anyone know?

 

Yes you can, But why not send the ecu back to technosquare and have them tweek it. Just send them an air fuel chart and a dyno run. Im sure they can tweek it this way. Have you dynoed the car at all? Do you have a dyno chart?

 

wrong. It has been tested pretty heavily that reflashes do not work. Yes they produce results at first but the ecu will revert back to stock settings. The best thing to do is run a stand alone ecu. If you are asking why not use the fmu that came with the turbo kit, you have no business talking about FI.

OP go to the my350z FI section and search.

Get a utec, greddy emanage ultimate or an fcon and call it a day. Emanage should have come with the greddy tt kit.

 

FYI, Utec is not just a Piggyback, it is a Parallel EMS where it takes full control of you injector/timing when on Boost. Utec don't scale value like other piggyback which rely on what the ECU want to run and they just subtract/add from it.

OP
You can only do so much with a Flash and you'll end up going back a million times if you do a million thing on your car. How does a Reflash take into account partial throttle tuning or DD? You can send them you dyno but they are mainly WOT run so what about other Cell/Load points that you will not hit on a dyno? If you already have a reflash then don't go back for another one, just bite the bullet and get a Utec or better since you have a much better control. Not to mention you can do your own logging so you'll see if your tune is actually still spot on. You can't look at your gauge 100% of the time you know and how do you know if you are getting light knock?

 

Yes but not the Ultimate. The one that come with Greddy is GARBAGE!!!!!

 

IMO, Flash + Standalone/Piggy Back is the way to go. Flashes, like ours, are useful for a couple of reasons 1.) Flashes allows you to equal out all internal oem ecu timing maps - something UTEC/E-Manage etc cannot do. This way, particularly under boost, if your oem ecu decides to flip internal timing maps, performance is not hindered and your motor stays in good shape 2.) Internal rev limit increase 3.) Internal injector scaling - no tricking the ecu with a piggy back or pseudo piggy back 4.) Idle bump.

 

/\Hey I was waiting for you guys to respond.. lol Will a reflash affect ODB2 inspection? I have been curious about it but not sure if I'll have problem with Inspection in NY. Can you also PM me price and details, I have a Utec and sometimes I do get some knocking on ECU Control especially in the summer and around 2700-3200rpm. Not also sure if a Reflash will solve the Part Throttle (Utec back to ECU control) jerkiness when going out of boost with Utec.

 

You have absolutely no idea what you are talking about. Revert back to WHAT settings????? A REFLASH alters the oem "settings". There are NO SETTINGS TO REVERT BACK TO.

Exactly where do I state that the turbo kit came with the FMU???? Dude clearly states he had the Uni-chip.

 

How is the test conducted? Just a scan of the codes to check for OBDII readiness and for error codes? A flash should pass that with no problems

 

True. But as it was suggested before, the reflash would take care of the closed loop operations and the aftermarket ecu would take care of the open loop operation. Reason why you would need both is because the reflashing guys don't have the ability to scale for a larger maf. The aftermarket gets around this by going speed density.

Reflashing can take care of bigger injectors (scaling) but I don't think too many companies have much experience with it. Reflashing can in theory rescale for a bigger maf but I don't think they've actually done it. Adress these two and the reflash could take care of everything. Well they might want to add boost altered timing/fuel maybe.

 

PM Sent!

 

I think as it stands right now, the reflash crew can't get more than about 500 also. Reason being is the maf voltage tops out at about that much hp. That and / or the injectors are going static at that hp. I know the reflash guys technically have the ability to rescale injectors but I don't think they can get around the maf limit yet. It's why the big hp guys go UTEC/Haltech etc... and use a MAP sensor. It goes around the oem MAF sensor voltage limits

 

Who has tested them?

Stand alone would be great, But then the you would some of the drivability that the car has from factory. Also if you drive on the stret how would you go through emissions. Fmu is a time of the past and I dont think any g turbo kit comes with one.

These are all "band aid" fixes to what the stock oem computer can do.