Power Fc Boost Controler

[tacker]

Guys,

just a quick question to those who have installed these units.

As the manual is in japanese i am not sure but i see diagrams of the boost control soliniod in series with the standard boost solinoid which does not seem right. Had advise to remove the standard and replace with the Apexi which seems simple enough. Yet to try it out but will do thursday i hope.

One more point is it possible to change the reading on the commander from mmhg to bar as a readout.

thanks.

[paulr33]

covered in the PFC FAQ in my signature, check it out

[tacker]

Cheers Paul, must have missed it as i reference your FAQ on all things apexi

[tacker]

old age is catching up with me sadly i didnt see any mention about changing the mmhg to bar for boost reading but sounds like the controler is ok as it runs with set duty in a day or so.

[paulr33]

yeah u cant change thart cos its imperial jap measurement i think

below 0.0 bar its in mmhg, like the stock boost guage

over vacuum it switches to kgcm2

[tacker]

Bugga then 882 mmhg it is

[Birnie]

Hey mate, I've just installed one last week.

http://www.skylinesaustralia.com/forums/in...3&hl=birnie

The pictures aren't showing but i can repost em later when i get home for you.

They show the wiring too which isn't too hard.

Yeah, +ve pressure in bar

-ve in mmhg

That's the same as my mechanical Blitz boost gauge.

Pressure might not have the same physical characteristics in negative pressure and therefor not messured in 'bar' as i believe even the PSI gauges have hhmg as -ve pressure, or vacuum (could be wrong, but once you've got complete vacuum ie space, you can't suck anymore out so it must be approaching a limit with the more vacuum reading you get, but pressure can keep increasing???)

Birnie

[tacker]

Birnie if you can post some pics that would be great!!!

I am having problems in attaching pics at the moment

[tacker]

one more quick question the hose with the restrictor in it goes to the waste gates i am guessing.

And what happens if they are the wrong way round

Edited May 9, 2007 by tacker

[Birnie]

The hose with the restrictor???

There is a clear filter if that's what you mean.

I was gong to put that on the sensor hose but it doesn't fit....didn't use it at all.

Anyway....some pics here : http://people.aapt.net.au/~jason1973/Skyline/

[Guilt-Toy]

Hey Birnie

That was a awesome job you did mounting the soloniod!

Cable ties rule

hehehee

[Birnie]

Haha, i try my best

[tacker]

LOL i was talking about the hose from the standard boost controler with the restrictor in it ( has yellow band around it ) does that go to the waste gates or is it from the manifold..

Thanks for the pics mate they are a great help.

regards

Edited May 10, 2007 by tacker

[Birnie]

I ditched the old tube and used what came with the unit.

So no restrictor at all.

Also, pressure feed from the intercooler piping went into the 'NO' hole on the new solenoid, and continued out the 'COM' hole which went to the wastgate.

[tacker]

Birnie i mounted mine like this it worked today as it held the 1 bar perfectly all day.

[Birnie]

Good work dude

[tacker]

this bloody thing is still not working went to lift boost to 1.2 bar to find it has just been using the actuator spring.

Could the harness from the ecu to the boost control solinoid be damaged, guess i will need to check. Tried to run at .8 bar only to have it go into boost cut no matter what value i entered in the duty cycle.

GRRRRRRR

[paulr33]

if you find its going into boost cut no matter what, ie: its spiking way over target boost then check the vac lines etc

if they are backwards it might not control boost at all and just never open, hence unlimited boost, hence it spiking way past target regardless of duty

or the wiring is wrong., its simply ground and positive power, if they are wrong the solenoid wont work

[tacker]

Hi Paul,

Ok what i have done is run a whole new line from the COM port on the solinoid valve over the engine into a tee piece, then to both to both waste gate actuators. I then plugged the old exsisting vac lines to the actuators with a bolt and clamp.

I have then used compressed air to determine which of the exsisting vac lines connected to the original factory boost controller are connected to where, ie before the turbos or after. I then connected the vac line plumbed in after the turbos to the NO port of the solinoid valve, And again plugged the other exsisting line now not used.

The wiring, i used the exsisting ( original nissan ) boost controller harness, and then plugged the new cable from the Apexi solinoid valve into the exsisting plug that was connected to the original nissan boost controller, and therefore should be connected to Power FC through this original harness.

bugga need coffee now after typing so much :-)

There is no spiking as such it sits rock steady on 1.15 bar if i have the boost limit on the hand controller set to 1.2 bar, we proved this time after time on the dyno last weekend. If we removed the vac hose to waste gate actuators and left it open to free air then it would spike, but wouldnt move from 1.15 bar while connected to the COM port on the Apexi solinoid valve. Even if we connected either of the older exsisting lines from the factory boost controller on the NO port it made no difference, hence why i dont think the Apexi solinoid valve is getting a signal from the ECU, or the valve is not functioning when it gets a signal.

[Chi100188]

hmmm sorry to hijack the topic...just wondering why my PFC BCK when set at 12 psi it boosts too 14 or higher? i've connected all the lines properly...is there a way to stop it from over boosting?

Cheers

Chi