Apexi AVC-R

[stuartturbo]

Just ordered this
couple of questions reguarding it, same as any boost controller?.

1) if unpowered does the car revert to std boost
I assume it does thinking of running power switch to sayrun 0.8bar on controller and use scamble function to run a bit more then switch of when i wont be using it family in car etc.

2) Is it possible to run wires up auto gear lever if not i'll put a swicth down there some where

hope to have it fitted for rolling road day

[mpau009]

Cant say for the apexi, but mine uses a boost control solenoid in place of the factory, so if the power is off, it runs full open boost... not fun, i would expect it would be similar. With my one, i just set a boost level that is similar to stock, i think its the best way, as you still build and hold boost better than the factory one.

[bernmc]

Again, mine's not an apexi, but safety and sense suggest that if the controller is off, the solenoid should be open and the wastegate actuator exposed to the full force of the turbo outlet pressure - so will open at around .4bar depending on actuator spring strength.

I'd avoid any controller that doesn't do this like the plague! Danger Will Robinson!

[mpau009]

Again, mine's not an apexi, but safety and sense suggest that if the controller is off, the solenoid should be open and the wastegate actuator exposed to the full force of the turbo outlet pressure - so will open at around .4bar depending on actuator spring strength.

I'd avoid any controller that doesn't do this like the plague! Danger Will Robinson!

You may be right there, mine wasn't releasing any, but it might have been because it was operating when the power cut off, so i guess it could have been a bit of a lottery as to where it stuck, either way it boosted way too high, and scared the .... out of me, so i wouldn't be fooling with the power source.

[Nutter_John]

Hi there


Just fitted one of these and when there is no power as Bern says the boost pressure goes str8 thru the soleniod to the wastegates , thus these open as per the normal boost control method

If you need any advice or a hand let me know I'm the Apexi expert now

Cheers John

[soapy1978]

stuart give me a shout if you need to see where the pipe work goes on this as i not got that one but my four stage must be smilor pipeing to your one

and i bring my car along and you can scan the bonnet for where they all go

darren

[psbarham]

If you need any advice or a hand let me know I'm the Apexi expert now

right then, this'll test ya

i have fitted one of these to a flying brick , and set the max boost to 1 bar, trouble is it won't hit 1 bar even with the duty set at 90% every now and then it nudges 0.95 but not for long, any ideas?

[Nutter_John]

how have you set it up using the boost and duty or have you set it up on an 8 point rpm basis

By flying brick what do you mean ?

[stuartturbo]

try lower duty mines set to 43% and set to 0.8 but will spike to about 0.83 then holds 0.8
if i increase it the spike gets much larger
try reducing target boost Ie 0.7 bar then get that right and increase set pressure

check for leaks etc

[psbarham]

how have you set it up using the boost and duty or have you set it up on an 8 point rpm basis

By flying brick what do you mean ?

tried both

its a T5 ovlov , we can't run full boost below 4k something about the rods objecting to 1.1 bar at low revs and quite liking the shape of bananas

[Nutter_John]

Hmmm , have you tried setting it back to stock boost control , and just use the apexi to monitor boots to see what the stock boost curve is like

That way you will have a better picture of how it is doing it by it's self

Then with the picture you can map the system to the same as stock , then pus a little further until you reach you target zone

[psbarham]

we'll give it a shot , when it does decide to boost it spins up in 3rd peice of piss , then 1 minute later it won't let us play

[Nutter_John]

has the T5 got a map sensor as it may be watching what your doing and cutting back to try and control it

[psbarham]

has the T5 got a map sensor as it may be watching what your doing and cutting back to try and control it

the ecu has been remapped and the ecu limit is at 1.1bar , we have disconected the standard boost controller so even if it wanted to it couldn't do anything

[Nutter_John]

But what does it generate on the normal stock boost controller

Yes it has been mapped to fuel to 1.1 bar but that doesn't mean it can make 1.1 bar

Maybe it is only going to 0.7 ->0.8 without the apexi ?

I'm also supprised about the rods not liking 1 bar below 4000 rpm , I would have thought it would like 1 bar at 6000 rpm even less due to the extra load ???

[psbarham]

But what does it generate on the normal stock boost controller

Yes it has been mapped to fuel to 1.1 bar but that doesn't mean it can make 1.1 bar

Maybe it is only going to 0.7 ->0.8 without the apexi ?

I'm also supprised about the rods not liking 1 bar below 4000 rpm , I would have thought it would like 1 bar at 6000 rpm even less due to the extra load ???

the stock controller is run from the ecu and that has been raised to 1.1 (well thats what the tuner said )

i was suprised by this as well , but its a common thing on the ovlov forums

i have wondered if the wastegates gone soft , but if the controller is set at 1 bar , then the solenoid won't do bugger all until it gets close to 1 bar , or will it ?

[Nutter_John]

the one bar is only the target value , this is the level it will aim to reach and control the boost at . The duty cycle is how quickly the rate of change is allowed to build up - with a 1 bar and 90% you should be spiking like a bitch

if the wastegates have gone soft then you would notice this on the normal set up without the apexi as a drop off of boost when in the higher relms of boost

Tuners says lots of things , very few say the whole truth (apart from Benh)

Things I would check ( no grandma I'm not telling you how to suck eggs )

the stock boost pressure , all the pipes for all the turbos for leeks etc

see when the boost comes in at which rpm , what it is at the top end and how does it bleed off

It does sound like you got some sort of problem but not sure what - strange one

[psbarham]

i will endevour to find the fault , i bet its something bloody stupid.
back to basics i think
all the pipes to the wastegate are new, so its dig a bit deeper it to its deep dark recesses

[Gowf]

Does it let you achieve high boost levels ever? It could be a problem with the actuator. If at the higher levels of boost the actuator spring is no longer strong enough to hold the wastegate shut then this could be an issue. When the control is switched off, what boost level do you make, i.e what pressure does the actuator work at?
This is the very same issue i have with the skyline at the moment. New actuator is on its way so i should find out soon if thats what it is.

[psbarham]

i did do a very basic test on it the other day and bugger it does open a bit easily, i know wastegate on these are about 5-6 psi which is mouse fart territory i think its rig up a pressure gauge and bike pump time