hey guys,

i need some help with a decision i'm facing. i'm looking at buying the hks evc v boost controller. i was also looking at getting the xede soon after that. now what i'm a little confused is, do i need to use the boost control on the xede or can i use the ebc instead? the reason i want to use the ebc is because i can change boost on the fly and not need to hook up a laptop. will this screw up the downloadable maps? thanks.

 

The XEDE has it own built in boost controller. It also holds two maps, so you can have a high boost and low boost map. The maps can be changed by an external switch.

 

i already know and understand that. i was looking for answers to the questions i asked above. thanks for the help though.

 

You do not have to use the boost control function on the XEDE. I know of a few people using MBC's in conjunction with their XEDEs (same concept), I being one of them. Been running 22psi for almost 6 months now with no problems what so ever.

When installing the XEDE, just leave out the XEDE boost control wire and you should be fine.

 

well, I don't know if it's completely true. When I had my hallman MBC on my car. I had my Xede installed and tuned and I couldn't even run stock boost. I was hitting fuel cut around 18-19psi. and had to have my car tuned at 17psi. I remove my MBC and installed the factory BCS and my boost instantly went back up to stock 19psi and I've never hit fuel cut since. I figured there could have been a few factors that could have been the issue, but they all directly related to the MBC. I'm guessing that an EBC could cause the same problem, because they operate similarly... I'm obviously not a professional at this, but I figured I would explain my situation.

- Why do you want to be able to change boost on the fly?

-Chad-

 

yeah, I think that was one of my problems. the boost controll wire was hooked up, because I plan on letting the Xede controll boost once I got my OEM BCS hooked back up. that could have been one of the problems causing the premature boost cut problem.

-Chad-

 

Funny thing is, I actually have my XEDE boost wire hooked up cause I plan on doing the same this April.

 

yeah, I've never been able to track down and figure out the cause of my problem. all I know is. when I removed the MBC and installed my OEM BCS. it fixed the problem. I also had to change around the way the vacuum lines were ran(back to stock), so it could have been something related to that. there's to many factors in my situation to be able to really pin point my problem. My opinion is let the Xede controll boost and be done with it. with an EBC/MBC there are dangers that come along with it. If Im not mistaken. the ECU will not allow you to boost over 12-15psi before operating tempature is reached which is a good thing. if you ever get a check engine light and go into limp mode. I'm guessing the factory ecu should lower the boost then also. with a MBC/EBC, they overide the ECU's controll and I just didn't wanna have to worry about that. IMO of course.

-chad-

 

Did you leave the OEM BCS electrical connection plugged in? If not that may be the problem.

 

yeah, you have to leave it pluged in. or I had to anyways or it would throw a CEL...

-chad-

 

here in denver the outside temps can chance a lot from one weekend to another, and just throughout the year in general, and i'd like to be able to go up or down 1-2 psi if i want, but i don't want to hook up a laptop everytime i do. that's one reason i plan on having a boost controller with my XEDE.

the other reason is really just because i want to.

 

Just wanted to throw this at everyone, I have an Xede which left me with great results however under a load when I went to full throttle I would hit the fuel cut point and then get an engine over boost CEL, the car drove fine as long as I didn't go full throttle. I just installed an Apexi AVC-R to try to correct the problem. I am still in the tuning stage but I have not gotten any of the afore mentioned problems plus I now have a boost guage to confirm what is going on. I havn't set it up to stock levels yet but I am just being carefull, don't want to break anything. End all, so far I like having both, the Xede and an EBC

 

I am really confused....
Why do you need a boost controller and an xede??

If your xede is tuned correctly, I see no reason for a boost controller

 

i've already made up my mind. i'm gonna use the boost control with the xede. thanks for the help.

 

easily corrected by the XEDE flash... raises the rmp and boost limits of the factory ecu