HKS Boost Controller!!

[sjbsuperman1425]

Well i got one and its installed and functioning, but would like some input on my hypothesis on how this is going to work. Heres a quick example/explanation:

Off Set Value: 0-100%. as it is increased, boost value increases.

Response Value: 0-100%. as it is increased boost rises faster. tends to cause hunter/overboosting and vice versa

Over Boost Value: 0-36psi. once boost exceeds this value, control returns to normal mode

Warning Value: 0-36psi. when boost exceeds value, warning function activates.

Drop Value: 0-100% when boost exceeds warning value, boost will be reduced by the drop value from the offset value that set to increase boost.

So, since the peak boost obtainable from the system is 36psi, and the scale is 0-100%, 100% is 36, 50% is 18, and so on and so forth. This being said, this would be my following setup for 7psi on the first mode of the controller:

Offset Value: 20%Response Value: 20%Overboost Value: 9psiWarning Value: 9psiDrop Value: 100%

Does my math and way of thinking sound like thats the way they intended it?

[sjbsuperman1425]

nobody is good with math and wants to recheck my equations

[float_6969]

It doesn't exactly work that way. The reason that the offset, response, and drop values are all in a percentage is because you are actually programming the duty cycle of the solenoid, not the boost level. Many turbo's aren't capable of 36psi, even with the wastegate line unhooked (100% duty cycle) That's why it's a percentage, because what each duty cycle will yeild you is different for every motor and turbo setup.

Basically, you're going to have to play with it. The instructions should walk you through how to set it up. If you don't have them, you should be able to find them on HKS's website, or online somewhere.

[sjbsuperman1425]

ah alright that makes more sense. Yea i got the instructions, i bought the EBC brand new. Thanks again Ryan. btw, get the exhaust gaskets yet?

[float_6969]

Yea, I did LOL. Thanks for the note.

[bentvalves]

letter, what letter.....

[float_6969]

[sjbsuperman1425]

lol exactly!

i haven't gotten around to messing with this yet. I spent the day cruising around and just making sure the car was running good and not leaking anything before i start pushing her hard. Within the next couple days i'll be drifting and have the boost controller set at 10psi, then move it up to 12psi.

btw Ryan, turns out my manifold gaskets ARE leaking, and i have to buy new ones. you lucky bastard lol

[sjbsuperman1425]

I have a question for you guys.

I have the boost controller set to 10psi righ tnow, and it'll hold 10psi until abt 5500rpm, where it falls to around 8psi at 6500rpms. Is this normal with the stock turbo and actuator? I called HKS and they said that this is a common occurance with stock application actuators. Just looking for some feedback.

BTW, if you have another boost controller besides the EVC-S w/ the stock T25 that does hold boost until redline, let me know. I'm starting to wonder if I bought a $330 piece of s***!

[BACARDI_DWB]

Yes that is normal for the boost to drop back down on stock wga's there is only so much you can do electronically before the mechanical part of the system takes over. A stronger wga spring would help you hold boost longer.

[sjbsuperman1425]

cool beans, that means I'm done with adjust that for now, Thank you very much.

I mind as well recap my experience with this controller.

Its very easy to manuver through and adjust. It was very easy to setup once I called HKS with some questions. My boost had been dropping off like this the past few days and I was under the impression that it shouldn't be, so I spent all this week and about 3/4 tank of gas trying to get a problem sorted out that didn't need sorting out. lol

All in all, this is a VERY good controller so far. Boost hits 10.9psi max then stables out to 10.2 or so before dropping off at the higher RPM's. The warning function works VERY nicely and saved me a few times. I'm going to fix a few coolant leaks, replace the exhaust manifold gaskets, and up the fuel pressure a bit and set Mode "B" for 12psi and have fun after i get my VLSD installed.

[DALAZ_68]

how bout some pics of how you routed urs for me to go off off...remember...i have the same damn unit...lol

[sjbsuperman1425]

oh yea i completely forgot. I'll post pics in a bit.

[sjbsuperman1425]

I AM NOT RESPONSABLE IF YOU DAMAGE YOUR CONTROLLER. REFER TO THE HKS MANUAL FOR PROPER INSTALL!



I mounted the control module (brains) underneath the armrest. you are looking at it through the cig-lighter which i obviously dont have.



Here is the solenoid. Mounted it on the driver side of the engine bay. Make sure you remove all the caps from the ports and install the hose-barbs into the COM and NO ports. A hose from the turbo should be ran to the NO terminal, with the supplied filter in this line somewhere. Then Run another line from the COM port to the Wastegate. Leave the NC port open.



Boost Sensor. Mounted it on the passenger side strut tower above the fuel filter. I ran the line w/ the little filter in it to a 'T' which i also used for my boost gauge.



Theres the controller. I chose this location soley based on I like my car looking fresh and I think i have a sweet setup going on here lol. Make sure to clean the mounting surface (I used rubbing alcohol). I then used a piece of velcro to secure it to the dash. I didn't want to use the double-sided tape because so I can easily remove the interior to access gauge wiring and what not when need be.

thats basically it for install, other than a power and a ground for the system, which is on one of the harness that connects to the control module (brains). just route all the lines and wires so they aren't kinked and are hidden from your feet and you're good to go. Very easy install.

[float_6969]

Yea, my stock boost would fall off in the top end as well. What are you running for manifold and exhaust? Sometimes the stock wastegate actuator spring gets tired and won't stay shut to hold boost, but it could also be from a restriction in the manifold or exhaust system too.

[sjbsuperman1425]

ebay O2 housing, downpipe, and 3" Catback with equal length manifold. My manifold gaskets are leaking so im not sure if that could cause any problems or not.

[DALAZ_68]

well im getting a T28 possibly next week...so ill deff get my system installed...

btw, where did you get power from? cig lighter?

[sjbsuperman1425]

the power for all my gauges and boost controller are wired to the CD Player power wire.

[float_6969]

Leaking exhaust mani gasket, or mani to turbo gaskets will DEFINITELY make the boost fall off. Do you want your gaskets back? LMAO!

[sjbsuperman1425]

no bought some last week, but just haven't gotten around to putting them on. most likely this weekend i'll be doing that. This time im going to dremel the gaskets out so the gasket isn't restricting my flow too..i've been lazy in the past..

[float_6969]

Are you sure you're putting the gaskets on right? I don't think I've ever had them restrict flow for me, but I do know that they can be put on wrong and IIRC they will cover part of the exhaust port.

[sjbsuperman1425]

unless im brain dead, im 100% sure im puttin them on right

i can get like two to go on good, but they still cover some of the port. the other two cover like half the port. i'll take my time this time and maybe post some pics. I jsut got the VLSD installed in the car this morning so ima go out and do some JDM drifts

[bentvalves]

if it was covering 1/2 the port you had it flipped, I think I just recently put a headgasket on backwards or upsidown on a mitsubishi mirage so dont feel bad

[sjbsuperman1425]

lol thanks ks13, that makes me feel alot better that you did that. Now i dont feel like my IQ is so low.

I still haven't gotten around to replacing the gaskets. Im sure once i do, my gas mileage of 18 will go up slightly. I'll see if i can't get the gaskets to line up 100%. Its probably the CXRacing manifold that is off and not the gaskets..I guess another reason why i should switch back to the stocker eh?

[sjbsuperman1425]

yup..im an idiot lol For the past year or so I had the exhaust gaskets on upside down and not exposing the full port lol. I now have them on 100% correct and am anxious to see how it affects the car. I was losing a good 1/4 of flow on each port..

I'm going to drive around a bit today to make sure there are no coolant leaks, then maybe try and reset the boost controller to see if i can get it to hold boost until redline. I also need to put the boost up to 12psi..36psi base fuel pressure for 12psi setting correct?

[float_6969]

You did this didn't you?

[sjbsuperman1425]

Very much so Ryan, very much so! Its all better now though

[float_6969]

LOL, how's it run now?

[sjbsuperman1425]

runs great actually. No more coolant leaks (for now). I thought i spotted an oil leak from the back of the head on the exhaust side, but doens't look to be exsistent anymore?

seems to spool alot better and with the controller off it holds boost at a steady 8.5psi after spiking at 10psi. So time to get back on and try and get it to hold 10psi to 6,000rpm. Think its possible or no? haha

and by spool alot better, im saying it feels just like it did last year. Last year i had butterfly valves, this year i dont.