need some help here. i'm overboosting big time in 4th and 5th gear. i have the pill in the compressor line off of the t and the turboxs 4mm replacement line off of the bcs w/o the pill. i'm running the turboxs abc all the way closed, and still boosting upwards of 26lbs. i'm not getting a detonation light, but the boost is freaking me out. the utec has been tuned on the dyno and acts fine in gears 1-3. my mods are below...

utec w/ abc
rmr downpipe
pruven test pipe
hks hi-power exhaust
255 pump
blitz tt/boost gauge
cusco twin plate clutch
tein flex coilovers
b&m shifter

any help would be great.
thanks,
jeremy

 

installed backwards?...?

The valve is closed? Shouldn't it be open... to allow full boost to hit the wastegate

 

everything is installed as instructed. the abc is turned all the way clockwise, for the lowest boost. i just took her out for a spin in the rain, and it's spiking up to 1.70 bar (24.6 lbs) and then settling down to about 21/22 lbs. is this ok?
thanks,
jeremy

 

Man, I'm really having a hard time trying to follow your hose routing.

Are you running BOTH the TurboXS MBC (you write 'abc', wtf is that?) and the factory boost solenoid? What are you trying to accomplish with this?

Please post the answers to this series of questions:

1) from the wastegate nipple, where does the hose attach to?

2) from the turbo outlet nipple, is this capped off? If not, where does the hose attach to?

3) What, if any, hoses are attached to the factory boost control solenoid?

4) Where does the INCOMING boost source for the TurboXS mbc (abc???) come from?

If you could answer these questions, it would help at least visualize how your set up is. With your current description, I have NO idea how your setup is. If it's what I *think* it is (using both factory boost solenoid and running the mbc off that) your setup is totally f*cked up.

Really, I'm trying to help.

 

. . . . . . . . . . ^
. . . . . . . . . . |
. . . . . . . . . . |
He speaks for me!

Keith

 

ok, here goes....

1. from the wastegate actuator nipple, the hose runs into a T

2. from the turbo nipple, the hose runs to the same T w/ the pill in its line.

3. one line runs from the bcs to the intake accordian hose, and the other is the line that turboxs says to replace w/ their 4mm hose and run down to the T that the wastegate/compressor nipples hook up to.

4. the turboxs mbc (i swear they call it an abc in their manual) is tapped between the T off of the wastegate/compressor lines and the bcs( the nipple closest to the headlight).

this is the way that the utec manual says to hook it up. maybe, i'm just crazy and reading it all wrong, but.... again, any help is appreciated.
thanks,
jeremy

 

Post under engine management / utec. Someone might able to help you.

Looking at the Utec manual, your setup looks correct. If anyone curious about UTEC, here is the link to the manual.

http://www.turboxs.com/EvoUTEC1.pdf

As the first step, I will recheck all the vacuum hose. Make sure no leaks.

 

Man i've installed i couldn't tell u how many boost controllers I say try this i'm not sure what the heck an ABC is but the last turbo XS boost controller I installed was an HPBC, take the line from the turbo outlet run it to the boost controolers in side... then run the "out" side to the wastegate, the valve should be fully cloosed for lowest boost setting... reason being becasue these boost controllers are basicly bleeder valves, when the bleeder is closed the wastegate sees actual boost, when its opened it sees a false boost, the car is boosting higher then what the wastegate reads becasue excess air is bleed off through the boost controller... this is how all boost controllers work, most ebc don't blee boost however just limit what gets past the valves. It's the same way the stock boost solinoid works. There shouldn't be any T's if my memory serves correct.... There is an installation error for sure if the valve is closed, check ur hoses and reroute them to try and eliminate that factor... good luck, if possible take a picture or make a diagram of your routing...

just my 2 cents

 

thanks, but the boost controller that comes w/ the utec has one inlet nipple. that's it.

 

Ok, I just read the install link provided by the previous poster and it seems that you're installation is dead on.

My first reaction to this is: WHY ???????? I can't believe that the UTEC slaps on a fricken bleeder valve on top of the factory boost controller to increase boost. Considering the fact that they sell 4 good manual boost controllers, they come up w/ this sheeot.

Maybe someone can explain to me the rationale behind this?

Like the other guy said, first check all the fittings to make sure there are no leaks.

Since the UTEC runs the factory solenoid, it might have the duty cycle set too high. But since you mentioned that the pill is still in the hose, you shouldn't be getting such high boost. I think the ABC might be defective. Even with it in the closed position (full clockwise), it's probably leaking boost pressure.

My advice is to ditch the entire setup and run their HPBC boost controller. I have this on mine and it works unreal.

Honestly, I didn't know what the Utec came with, and I assumed that you just royally f'ed up the install. But after looking at the .pdf for the Utec, the only thing f'ed up seems to be the boost control design.

Really, can someone explain why they went this route? What's the advantage of this design?

 

 

i asked TurboXS about using a manual boost controller and they said it was fine. I would just use an MBC

 

The current version of the UTEC firmware for the EVO only allows
open loop boost control. Basically that means all you can do is set a boost control solenoid duty cycle. Their is no feedback so it's easy to overboost if you don't set the duty cycle correctly.

You should reduce the duty cycle a little at the upper rpm ranges to reduce boost.

With the next version you should have closed loop boost control which requires a you to install a MAP sensor. Nice.

Oh, the ABC is their so you can increase boost over the stock values. It bleeds off a little extra air to help the wastegate.