Shiv,

Ok, so I got the XFlash! Great! Now I would like to know some specifics.

1) Will boost pressure increase automatically? What PSI?

2) What is the typical WHP increase for this XFlash? I heard somewhere where you like the XFlash because you can eliminate the boost limiter and rev limiter thereby getting higher boost in the mid-range than normal XEDE piggyback users. Why?

3) Does the XFlash modify the functions of the water-sprayer (i.e. when it comes on and how long it stays on, etc..)?

4) How will I know that my car has been XFlashed by driving by the seat-o-my-pants? (i.e. boost will go to 1.5bar? boost won't bleed back?)

Thanks again,

-M

 

I could be wrong, but I think the xflash only increases the rev limit and removes the fuel cut. I dont belive it has anything to do with boost. I believe the XEDEFlash does all the things that the regular XEDE piggy back does, like raise the boost change the fuel maps and adjust ignition timing along with the increased rev limit and removed fuel cut.

 

I see. So the difference then is since it can remove fuel cut, you don't have to worry about changing the boost signal wire. But if the boost signal wire goes to the regular XEDE, why doesn't it eliminate fuel cut? Basically, what's the purpose of having to fiddle with the boost wire with the XEDE piggyback? You don't have to do anything to the boost with the XFlash.

-M

 

The Xflash is a ECU reflash...it will increase the performance of you evo by having the perameters inside the stock ECU modified, it will modify boost levels although you will need to install a bleed tube under the hood (supplied by Vishnu) when the ECU is returned.

The Xedeflash is an ECU flash that compliments the Xede piggyback unit and addresses the areas of control the Xede is unable to.....i.e. speed limit, rev limit and fuel cut.

hope this helps
Andrew

 

What is the purpose of this bleed tube and where do I install it?

-M

 

The bleed tube is what increases the boost level, not any code in the ECU, since the bleed tube is installed in place of the factory boost control solenoid.

The XFlash is a retune that can give all the performance of an XEDE minus the boost control flexibility and the ability to change maps for different fuel types.

The XEDE is a piggyback computer and can not modify the code stored in the computer, that is why your boost limit, top speed limit, fuel cut all remain in place, because they are coded in your factory ECU.

Vishnu's way around this is to sell an XEDEFlash, which is a very basic flash that compliments the XEDE. It changes absolutely nothing besides the boost limit, the top speed limit, and fuel cut. When the XEDE and the XEDEFlash are combined it is as powerful as an XFlash with the added ability for the user to tinker and change maps.

An XFlash is a good upgrade if you don't plan on doing more modifications to your car than it currently has and don't plan on running more than 1 octane fuel. This is because every time you want to change the maping you need to send the ECU back to Vishnu to be retuned again.

If you have an XEDE and XEDEFlash combo and you do more mods, such as adding cams, you can simply download a new ECU program off the internet and program it into your XEDE and off you go. Or if you want to go to the track and run some race gas, you can switch programs easily since the XEDE can store 2 programs in it's memory.

HTH

- Steve

 

Just to add... I believe the Xede/Xedeflash combo will typically make more power than the Xflash as the Xede has the ability to turn down the sensitivity of the very fussy stock knock protection that will pull timing if you turn the radio up...

 

Crap. I must've forgotten to include the instructions, I was rushing to get everything all ready for ups Ok, here's how it goes:

Remove the two 10mm bolts holding your airbox in
Remove the clamp holding the intake hose to the airbox.
Unplug the MAF
Remove airbox
You'll see two vacuum lines directly under the airbox, both connect to the boost control solenoid. The one closest to you will have a brass colored clamp on it.
Remove both lines from boost control solenoid
Connect both lines together using the bleeder supplied
Put airbox back in..dont' forget to plug the MAF back in too!

If you have any questions regarding the bleeder install, please call me at the shop and I can walk you through it.

Regards,

The Tron.

 

Will do.

And thanks for the insight guys.

-M

 

Sorry for the bad info BoostEZ, I had the xflash and xedeflash mixed up. Thaks for clearing that up SuperHatch.

 

Hey man, no harm no foul, just didn't want future Vishnu customers getting that mixed up.

- Steve

 

One quick question is the factory boost solenoid removed from the equation? I mean after connecting the two vacuum lines with the bleeder tube is the factory boost solenoid necessary anymore?


Dan

 

The hoses from the solenoid will no longer be connected to it. However, i would leave the solenoid pluged in at the electrical connection just to keep the ecu happy.

 

Sonic,

Thanks for the help. It looks like my bleeder tube was installed improperly...kind of surprised by that because I guess the car was only running with better fuel adjustments and no boost benefits from the Xflash. Hopefully later this afternoon that will be resolved.

Dan