The XEDE controls the factory boost control solenoid directly. There are no additional bleeders/valves/etc that need to be installed. Instead, all we do is remove a restrictor in one of the boost lines. The removal of this bleeder gives the XEDE extra mechanical overhead so that boost can be raised higher than stock, if so desired. With that restrictor still in place, you could run the factory boost control solenoid at 100% duty cycle and barely see any increase in boost over stock.

As for tuning software, XMap version 2 will be released within the next two weeks. It will be fully featured and offer additional tuning functions. It will also be freeware. No more licensing. It will be free because want to encourage others to take advantage of its tunability and ease-of-use which is, IMHO, is miles ahead of the other options currently available on the market.

Cheers,
shiv

 

Hi guys,
Here's a little READ ME doc I wrote during my flight today. It's a good place to start when you first get your XEDE.

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I Got My XEDE! Now what do I do?



Thank you for purchasing our XEDE system! We have taken many steps to ensure that it performs flawlessly for many years. The electronics, itself, have been through 4 levels of quality control at the manufacturing facility. And the entire complete system (XEDE unit with harness) has also been installed and tested in our own Lancer Evolution before it was packed up and sent to you. Getting up and running with your new XEDE is a quick and painless process. Nonetheless, following the directions carefully is vital for ensure proper installation and trouble-free performance. Failure to follow these instructions can result in any number of problems.

STEP 1 Make sure you have filled up with good fuel
Like all high performance turbo cars, the Lancer Evolution is very sensitive to fuel quality. If here is one area to save money, gas station selection isn¡¦t it! It is very important that you use only name brand gas stations and fill up with the highest octane they have available. In California and Arizona, where 91 octane is the highest grade fuel, it is especially important to be careful with brand selection. We have had the best luck with 76 brand fuels. Remember, we are trying to extract more power from you engine and the only way to do it safely is to rely on the knock-resistance provided by premium grade gasoline. For those who live in the other 48 states, please don¡¦t run anything less than 93 octane.

STEP 2 Download the installation instructions
Go to www.vishnutuning.com/xede_evo_instruction.htm Print this out. These instructions will tell you how to install the XEDE unit into your Lancer Evolution. It may look a little daunting at first. But it really isn¡¦t. In fact, we¡¦ve timed ourselves at 4 minutes and 23 seconds from beginning to end. Of course, installation is not a race so please take your time and do it right.

STEP 3 Make sure you have the correct map loaded into your XEDE computer
Most XEDEs leave our shop without a map loaded into them. Driving around with an unmapped XEDE will leave you quite disappointed. If this is the case, it is important that you upload an appropriate map. These can be downloaded from our website at www.vishnutuning.com/xede_evo.htm. Make sure you download the appropriate XEDE map, paying special attention to the octane fuel that it is designed to be operating on. Running a 93 octane map on 91 octane will result in inconsistent and sub-par performance. To upload a map into the XEDE, you will use a software program known as XUpdate. This download and viewing software can be downloaded at www.vishnutuning.com. Instructions on how to use XUpdate can be downloaded at www.vishnutuning.com. If your XEDE has arrived to you already pre-programmed, it will be labeled accordingly. Make sure what is loaded on to the XEDE is appropriate for you application. If not, upload the appropriate map using XUpdate.



Troubleshooting

When I accelerate hard, my engine cuts out suddenly for a moment!
If this is happening, the first thing to check is your boost pressure. If it is too high, you may be reaching your boost limit. This is a protection strategy that will activate a fuel cut when boost pressures are too high. With the XEDE, peak boost pressures shouldn¡¦t exceed 20-21 psi. If they are, check the vacuum line that goes to the boost control solenoid (the hose that once held the brass restrictor). Any tears or rips in this line will cause overboost conditions.

My boost is lower than stock!
The XEDE is in full control of boost so there are only a few conditions that can result in low boost conditions. One possibility is that the boost control wiring was not doing correctly. This can mean that the male and female joint could have come undone. Or it could mean that you pushed the blue wire into the wrong socket in the harness. Go over the instructions and double-check your work.
Another possibility is that you still don¡¦t have a map uploaded into the XEDE computer. Upload the appropriate map using XUpdate.
Yet another possibility is that you have not removed the brass pill as per the instructions. With this still in the system, your boost will be lower than stock.
Lastly, you may have a boost leak. This is especially likely if you have installed other parts (such as intercooler hose upgrades) at the same time as the XEDE. Double check your work!
Remember, depending on which map is installed in your Evolution, peak boost pressures should be between 20-22psi. Due to limitations of the factory turbocharger, boost pressure will taper noticeably towards redline. This means that, at 7000RPM, boost pressures may have fallen to 17-19psi. This is normal.

My check engine light (CEL) came on with driving!
Any number of things can cause this. From improper spark plug gapping, to over-boost, to catalyst inefficiency, to a loose wire somewhere in the ECU harness, to an open gas tank lid, etc., With so many possible causes, the only way to get to the bottom of it is to read the code with an OBD-II scan tool. Virtually every service shop (especially those what work on import cars) will have one. They should also be willing to read your code for a nominal fee, or even free of charge. It only takes a few seconds to do so.


Helpful Hints

1) Get a boost gauge! This will allow you to confirm that boost pressure is within specification. Every turbo car should have one! We sell ¡¥em, by the way ƒº
2) If you do decide to take advantage of the XEDE map-switching feature, make sure you install the switch in an appropriate place. That is, if you have other people driving your car, you may want to hide it.
3) Leave your XEDE unit expose for the first day or two (instead of tucking it behind the glovebox) to ensure that the LED turns a solid green when the engine is running. Nothing would be more pathetic that running the XEDE for a month before realizing that it was never operational due to a flakey installation, hardware troubles or a bad map upload.

 

gimmie gimme gimme
i'll give you a call later.

Tom

 

Shiv,

Thanks for clarifying the boost control question! I had actually heard that in stock configuration the FBC was pretty close to tapping-out at 19.5-19.8 psi. I assume that at 100% FBC duty cycle, the brass restrictor is simply blocking flow from the compressor nipple, and in a static open condition the FBC can't purge any more pressure than allowed by the restrictor(hence the name).

I am kind of surprised that you don't see any kind of spiking issues with the restrictor removed altogether instead of replaced with a different size restrictor? I remember running an early ProDrive ecu in my WRX and it came with a slightly larger restrictor to use in conjunction with the FBC.

It was fairly cold weather (below 35F)and during my test drive everything seemd great until I decided to jump on it from a roll. It spiked hard to almost 21psi, hit fuel cut, and blew back through my turbo (Vf23) blowing out my turbo inlet hose in the process.

After fixing the hose, I put the smaller restrictor back in and found that it was still spiking, but only to around 19. This was still unnaceptable so I sent the ECU back, but the point is that the restrictor really seemed to impact boost spike on the WRX. Again, I do realize that the WRX and Evo are different animals, but it seems like the logic would hold. I guess it depends on the engineering specific to each cars turbo systems.

Btw- with the restrictor out, can you tell us the maximum psi the FBC is truly capable of holding?

Thanks again for the info!

N10S

 

How compatible is XEDE with other add-on mods??

I plan on getting the XEDE in the near future.... but not sure how
it will work with upgrades of another brand.... things like BOV,
drop-in filter or intake, exhausts (I know shiv sells exhaust but
could XEDE work with another brand exhaust?)...etc etc

 

Also... whats the boost adjustment range for XEDE?