Shiv...

Just wondering...is it possible to VTA with the XEDE or the XEDEflash combo without having the car stall? I had an HKS SSQV VTA on my car with just a SAFC II...god did it suck! I want to know if you can do something with all the knowledge in your head to allow us to use VTA on our cars.

I already know Recirc is best...and I definately agree with that...but sometimes for fun I want to runVTA when I go to shows and stuff. I know with the XEDE you can have two maps...but I am not sure if that would help things. Please let us all know!!!

Thanks

 

With out going full MAP as a load point there will be always issues with BOVs.

 

Yeah that's what I thought....just wanted to know if Shiv had a way to do it with either the XEDE or the XEDEflash combo. I know Buschur says to use the AEM EMS with ummm...god what was it...Speed Density I think he said.

Either way...I take it that it's not possible with the XEDE unit ot XEDEflash at all?

 

No it's possiable because the Xede can be run Speed Density but is it really worth if for most evo owners with light mods to run Speed Density and have to install other iteams in there cars.

Is the pshhht really that important.

 

It's not totally important. I prefer performance over sound ANY day. Although sometimes it's nice to do it at shows ya know. It's for all the little twerps that don't know jack about cars. It get's their attention. If I was to pick...I would recirc any day of the week. At the shows I would like to be able to have the ability to "pshhht" LOL as you put it!

Thank a lot for the help Eric! I really apprecaite it

 

Well then you may pick up on Ebay this little computer with loud speaker that will make the Pshhht noise all you want for the shows

 

OMG REALLY THAT WOULD BE SWEET!!! What's the item#???

NOT

LOL that's so ghey!!!

God I needed a laugh today...work is sucking @$$

 

If the Xede is run in speed density mode, doesn't it only output speed density information to the ECU (i.e. a modified MAP/temperature sensor output)? Or can it translate that into a Karman frequency signal?

I couldn't find the answer, but I bet that at least in its current form, it can only output the type of signal that it has read in. In other words, speed density -> XEDE -> speed density, or karman -> XEDE -> karman. But not speed density -> XEDE -> karman, which is what the Evo would need.

 

Shape,

External MAP senser connected to Xede for load vs RPM

Does that clear it up.

 

Yeah, but that isn't speed density. If what you say is true, it isn't used for air metering, just for the measurement of boost.

The HKS VPC is a speed density to Karman converter on DSMs.

 

Just because I have not played with it I can't answer that but it is ture speed density like AEM/Link and other stand alones yet still a interface system. But in all honesty I'm not right person to comment on this. Look up ProXede in this forum.

Eric

 

The Xede down't drive the injectors directly. Instead, it modifies inputs to the stock ECU. The only inputs to the stock ECU that would affect fuel delivery are the MAF frequency, the barometric pressure sensor, and the intake air temp sensor, all of which are located in the MAF.

So if the Xede allows you to run with speed density, it must convert from a MAP/air temp/RPM mass airflow calculation (with a volumetric efficiency table) into one that the ECU can understand, which would be MAF frequency, barometric pressure voltage, and the intake air temp sensor voltage.

That is what an HKS VPC does. But it holds the barometric pressure and intake air temperature values constant, and varies the frequency that the ECU sees.

From what you have said, it sounds to me like the Xede can use the extra MAP input as a load index into its internal tables, rather than using a calculation derived from the mass airflow and the RPM of the engine (using some sort of volumetric efficiency number). That is a very different thing than speed density air metering.

Perhaps ProXede or Shiv will chime in here.

Now, I can definitely see using an XEDE as a piggyback on a speed density ECU, and it would modify the MAP/temp, along with have a VE table.

But conversion from speed density to a MAF output is a different thing.

 

All these fried brain cells spewing the Tech matters of just getting a VTA to work? Gotta luv it

 

You can run the car with out a MAF sensor. Is that what your looking for. As far as anything else goes in detail again I'm not the right person to answer these well thought out questions.

Eric