AVC-R issues - SRT Forums

rasp · 10-14-2008, 09:30 AM

Everything on it works, but it seems like the bar-to-boost calculation is out of loop. Even if I have my boost set to 1.10 bar, I will boost at like 22psi. It's driving me nuts at this point. Duty cycle is at 57%, and lowering it doesn't accomplish a whole lot. Can anyone shed some light on this badboy? Thanks.

moreause · 10-20-2008, 12:34 AM

there a menu feedback make sure it is on at least on higner gear other wise it will just use the set wg duty cycle

and screw the leanrning stuff turn that option off

and what are your value in the hum what is the name starting wg/dcycle i think if they are positive you will over shoot your set value

91PumpKing. · 10-20-2008, 12:36 AM

did it happen out of the blue... as in happened w/ no changes in your settings?

rasp · 10-20-2008, 07:18 AM

Quote: Originally Posted by moreause

there a menu feedback make sure it is on at least on higner gear other wise it will just use the set wg duty cycle

and screw the leanrning stuff turn that option off

and what are your value in the hum what is the name starting wg/dcycle i think if they are positive you will over shoot your set value

I will try the top option. I do have "learning" mode off, and no boost-by-gear, atm. IIRC, I have gear-learn off.

Value in the hum? Sorry, I am not really sure what you're trying to say in the last sentence, lol...

Quote: Originally Posted by 91PumpKing.

did it happen out of the blue... as in happened w/ no changes in your settings?

Honestly I can't remember with the new build; it hasn't been until recently that I have actually been able to open the car up...

moreause · 10-20-2008, 06:54 PM

just for fun are you sure you connected the vaccum hose correctly on the solenoide

i if you reverse com and nc it will just over boost all the time...did that in the past hum no good

rasp · 10-20-2008, 08:40 PM

Vaccum lines are set per the instructions and, as far as I know, correctly.

turbojack · 10-20-2008, 08:54 PM

On the topic but yet piggy backing on this thread because I'm preparing for the install of this myself. Here's a copy and paste of what I found on the net......I think its straight out the manual

Below this if for using a wastegate actuator (like the SRT-4 stock)

1. Actuaror Type

1. Disconnect the hose from the turbine compressor to the actuator.
2. Cut the necessary length of 6 pi hose and connect the compressor side to the NO side of the solenoid valve and the actuator side to the COM side of the valve as shown in the diagram (Leave the NC side of the valve open.)
3. Mount the solenoid valve away from high temperature areas with the included bolts and Rubber Mounting Plate.
! Caution installing the solenoid valve near high temperature areas or mounting the valve without the rubber mounting plate may shorten the life span of the valve and in the worst cases break the valve.
4. Locate the hose from the surge tank to the fuel pressure regulator and insert the 4 pi 3 way into the 4 pi hose. Connect another 4 pi hose to the open side, cut an appropriate length and connect it to the pressure sensor.
5. Mount the pressure sensor away from high temperature areas and use the included bolts to mount the sensor with the connected hose facing downwards.
! Caution installing the pressure sensor- near high temperature areas may affect the accuracy of the sensor and in the worst cases break the sensor.
6. Secure all hose connections with either a hose clamp or a zip tie and make sure that none of the hoses are crimped.

___________________

Below this if for using a wastegate actuator (big turbo external like the AGP 50 trim kit)

2. Wastegate Type (Poppet Type)

1. Connect the included 6 pi wastegate nipple to the top nipple of the wastegate. (Please apply some sealing agent onto the threaded part or the nipple.)
2. Disconnect the nipple connected to the NO of the solenoid valve and connect it to the NC side of the solenoid valve. (Please apply some scaling agent onto the threaded part of the nipple.)
3. Attach the included orifice to the open NO side of the solenoid valve.
4. Connect the included 8 pi - 6 pi - 8 pi 3 -way in between the hose coming from the surge tank to the lower side of the wastegate. Cut and connect a 6 pi hose to the open side of the 3 way and connect it to the NC side of the solenoid valve. (The NO side of the valve is open to the atmosphere.)
Connect a 6 pi hose to the nipple from step I and hose it to the COM side or the solenoid valve.
5. Please refer to steps 3-6 from the actuator type instructions

__________________________________

IS above correct?

**gump1114** · 10-20-2008, 08:57 PM

if you turn the ebc off does the boost drop down to whatever the wastegate is set at?

rasp · 10-22-2008, 11:15 AM

Thanks for all the reply guys, it seems as if I had my duty cycle too high! I am running a 35R, so I guess the EBC doesn't like a higher duty cycle with that. I basically dropped it from 75 to 50 and put my psi at 1 bar and hit 1.05 at full throttle so it's about spot on. I can contribute the small deviation due to elevation pressure. Per Apexi's recommendations, they told me with a big turbo to start at a low duty cycle, then move your way up until it starts to overboost; then lock it in at the highest duty cycle before it starts to overboost (very similar to fueling changing with a piggyback).

I also re-adjusted my F/B to accommodate my 17" rims. Things seem to be working much better now...no more boosting to 1.80 bar!

moreause · 10-22-2008, 11:28 AM

hum so the issue was the programmer not the avcr lol

rasp · 10-22-2008, 11:39 AM

Quote: Originally Posted by moreause

hum so the issue was the programmer not the avcr lol

No one said it was the hardware itself, Mr. France.

***EDIT***

Here's what a fluent English speaking representative from APexi told me:

"Turn off both FB and the 'learn' procedures to make the system 100% manual. The FB should always be set at around 6-7 simply because higher than this causes the AVC-R to get a little overzealous in its attempt to auto-correct the boost and will spike intermittently or cause a stumbling issue in the vehicle. Duty cycle should start at 35-40%, then increased until it's right at the threshold between holding set boost and overboosting."

I followed those instructions and the car holds preset boost in the AVC-R like none other.

**gump1114** · 10-22-2008, 03:52 PM

ok since you got your issue figured out, maybe you guys can help me with mine....

mine is doing something odd. i can got WOT in 1&2 gear just fine, but when i get full boost in 3-5 the avc-r starts to continuously reset itself. what i mean by that is, the screen and everything will turn off and then show APEXI as if i just started the car. whenever it does this the EBC stops working and then once it turns back on the EBC will start working again. basically what this causes is boost to jump up and down as the avcr is turning on and off.

any ideas?

rasp · 10-22-2008, 03:56 PM

^^sounds electrical...

jmaconcepts · 04-27-2009, 12:12 PM

Sounds like maybe your car in motion maybe shacking the wires or the AVCR unit around. Start with the car on and idling. Tap the AVCR - wiggle the wires coming out of it - wiggle the wires where you made your connections.

See if you can make it go off!

If so wiggle each wire by itself keeping and eye out for it to turn off or flicker.

If none of this makes it turn off or flicker then see if anyone you know has one you can test with - simply unplug harness and swap it out.

If you do not have a way to test with another unit: Then you will have to send it out for test and repair.

I beleive www.APEXI_usa.com is your best bet for that.

exevoboy · 04-27-2009, 12:18 PM

do you have to use MSD tach driver with AVCR i have a FTM fuel manager and a avcr hooked up i was goin to remove tach driver but didnt know if AVCR runs off it like the greddy EBC. thanks