Apexi AVCR bit the dust. No more 24psi on pump gas.
05-08-06, 08:48 AM
#1
Apexi AVCR bit the dust. No more 24psi on pump gas.
Well figured out since I removed my apexi avcr that I can maintain 5psi of boost with 7psi spike on the wastegate spring. So my 24psi runs were because the apexi avcr failed. Normally with the avcr selected to off it should hold 12vdc to the solenoid to allow it to run open to wastegate. This is not the case. I removed the solenoid and applied direct 12vdc to the solenoid. It operated perfectly. So I ripped apart my interior and measured the continuity of the wiring to the solenoid. It rang out fine. For a second I thought that installing the wideband along the same wires as the haltech/avcr that I may have damaged a wire. Not the case. (It worked last year and the boost lines are correctly installed)
Anybody have experience in this type of troubleshooting? If it is bad then this is one expensive boost gauge!! I might be able to use the solenoid throught the haltech as a boost controller.
Anybody have experience in this type of troubleshooting? If it is bad then this is one expensive boost gauge!! I might be able to use the solenoid throught the haltech as a boost controller.
05-09-06, 05:10 PM
#4
Originally Posted by ShaunO
If you use the Haltech to control boost, that'll mean you'll need a laptop everytime you want to change your boost settings, won't it?
05-09-06, 05:15 PM
#5
Originally Posted by eViLRotor
NC port to pressure source.
COM port to WG Top Nipple.
Yes?
COM port to WG Top Nipple.
Yes?
Com port to top
As shown in the apex manual
http://www.apexi-usa.com/pdfInstallation/21.pdf
page 48
But then again I've stared at it for so long I think I have 4 boost lines now. LMAO
05-10-06, 11:23 PM
#6
Former Rx7 *****
Join Date: Nov 2001
Location: Mississauga
Posts: 4,534
Likes: 0
Received 0 Likes
on
0 Posts
Ian,
The solenoid should operate normally open. Meaning if the avcr fails the solenoid fails open. Which means the manifold pressure would be allowed to reach the wastegate and hence open it and not cause it to spike sky high. Which then means it takes 12V to close the solenoid to block the pressure source to teh wastegate. You sure you got it wired up correctly? You need to proof read your posts. I did not understand a lick of what you typed in your 1st post for this thread
The solenoid should operate normally open. Meaning if the avcr fails the solenoid fails open. Which means the manifold pressure would be allowed to reach the wastegate and hence open it and not cause it to spike sky high. Which then means it takes 12V to close the solenoid to block the pressure source to teh wastegate. You sure you got it wired up correctly? You need to proof read your posts. I did not understand a lick of what you typed in your 1st post for this thread
05-10-06, 11:32 PM
#7
Former Rx7 *****
Join Date: Nov 2001
Location: Mississauga
Posts: 4,534
Likes: 0
Received 0 Likes
on
0 Posts
Ok I read the manual again. It's been several years since I installed my. From your posts you have made you say, you are using NC and COM as your connections for the pressure lines (ie vac hoses).
YOU ARE DOING IT WRONG! WRONG! WRONG! WRONG!
Which is why I said the AVCR fails safe. You would be a moron of an engineer to design a system such that a control device failure causes a system to go out of range.
Pressure sources goes to "NO" (normally open). So the brass fitting screws into NO and you run a vac hose from your intake manifold to this or T it off the factory pressure sensor.
A vac line then goes from "COM" (common) to your wastegate.
Oh just in case. I went outside to check my car and manifold pressure source goes to NO, and COM goes to wastegate.
You scare me.
YOU ARE DOING IT WRONG! WRONG! WRONG! WRONG!
Which is why I said the AVCR fails safe. You would be a moron of an engineer to design a system such that a control device failure causes a system to go out of range.
Pressure sources goes to "NO" (normally open). So the brass fitting screws into NO and you run a vac hose from your intake manifold to this or T it off the factory pressure sensor.
A vac line then goes from "COM" (common) to your wastegate.
Oh just in case. I went outside to check my car and manifold pressure source goes to NO, and COM goes to wastegate.
You scare me.
Trending Topics
05-10-06, 11:50 PM
#8
Former Rx7 *****
Join Date: Nov 2001
Location: Mississauga
Posts: 4,534
Likes: 0
Received 0 Likes
on
0 Posts
oh... and I copied and pasted excerpts from the manual for you.
Note: Subaru does not make rx7s. So the comment about Subarus require a way to connect to solenoid valve does not apply to you.
Note: Subaru does not make rx7s. So the comment about Subarus require a way to connect to solenoid valve does not apply to you.
05-11-06, 12:02 AM
#9
Former Rx7 *****
Join Date: Nov 2001
Location: Mississauga
Posts: 4,534
Likes: 0
Received 0 Likes
on
0 Posts
ok... I should really consolodate all these replies to one post. Blame Edmonton for not wining the game in regular time.
Looking at the manual again to figure out why you would think of using NC.
I see on page 45 (according to scanned image) or page 49 if you are going by what adobe numbers the pages by.
NC is used in this way.
For wastegate type cars (i.e. Ian's turbo setup).
Pressure source from manifold/turbo compressor housing goes to NC.
Com goes to wastegate nipple.
BUT!!!! Don't forget you need a 3 way "T". You "T" the pressure source so that both the wastegate and the NC sees pressure. Why you ask? Because now the solenoid acts like a valve. In this configuration the solenoid is normally closed. When it is closed it allows the wastegate spring to see pressure from the turbo. Meaning you boost to 10 psi. The wastegate will see all 10 psi. To create more boost the Apex-i AVCR cycles the solenoid on and off the NC port. This prevents some of the pressure from the turbo to goto the wastegate, not allowing it to open or only opening it a fraction. see attached.
I think you forgot to put the 3-way "T" in. No? Yes?
ok looking at the attached figure... I thought about it somemore. Does your wastegate have two pressure source ports? I think you only have 1 port right? the attached picture (apexi manual) shows that the wastegate has two ports where pressure sources goes to? COM and off compressor housing? I don't get it. If you don't have to sources just like the picture. then you should wire it up like what I posted originally. pressure sources goes to NO, COM goes to wastegate.
Looking at the manual again to figure out why you would think of using NC.
I see on page 45 (according to scanned image) or page 49 if you are going by what adobe numbers the pages by.
NC is used in this way.
For wastegate type cars (i.e. Ian's turbo setup).
Pressure source from manifold/turbo compressor housing goes to NC.
Com goes to wastegate nipple.
BUT!!!! Don't forget you need a 3 way "T". You "T" the pressure source so that both the wastegate and the NC sees pressure. Why you ask? Because now the solenoid acts like a valve. In this configuration the solenoid is normally closed. When it is closed it allows the wastegate spring to see pressure from the turbo. Meaning you boost to 10 psi. The wastegate will see all 10 psi. To create more boost the Apex-i AVCR cycles the solenoid on and off the NC port. This prevents some of the pressure from the turbo to goto the wastegate, not allowing it to open or only opening it a fraction. see attached.
I think you forgot to put the 3-way "T" in. No? Yes?
ok looking at the attached figure... I thought about it somemore. Does your wastegate have two pressure source ports? I think you only have 1 port right? the attached picture (apexi manual) shows that the wastegate has two ports where pressure sources goes to? COM and off compressor housing? I don't get it. If you don't have to sources just like the picture. then you should wire it up like what I posted originally. pressure sources goes to NO, COM goes to wastegate.
Last edited by Cheers!; 05-11-06 at 12:14 AM.
05-11-06, 02:57 PM
#10
Cheers.
Thanks for taking the time to figure it out and explain it. Ya I scare myself. When I reinstalled it after I checked all of the lines for cracks and it worked wonderfully. So that tells me I may had it reversed. Which is really stupid since I had this thing pulled off like 10 times in the past and even installed it correctly 4-5 years ago the first time. I think I subconsiously remembered that the black line went to the top nipple and the blue line went the side nipple. But when I had the brake lines removed I probable disconnected all of the lines and swapped the lines going to nipples. (IE all lines going to the wastegate were blue except one that I had to reduce to fit the nipple. makes sense?)
So stupid me even removed the wastegate to check for a tear in the diaphragm.
Thanks again for your help and I will go and proceed with banging my head against this desk.
Thanks to evilrotor for sending me that email as well.
Thanks for taking the time to figure it out and explain it. Ya I scare myself. When I reinstalled it after I checked all of the lines for cracks and it worked wonderfully. So that tells me I may had it reversed. Which is really stupid since I had this thing pulled off like 10 times in the past and even installed it correctly 4-5 years ago the first time. I think I subconsiously remembered that the black line went to the top nipple and the blue line went the side nipple. But when I had the brake lines removed I probable disconnected all of the lines and swapped the lines going to nipples. (IE all lines going to the wastegate were blue except one that I had to reduce to fit the nipple. makes sense?)
So stupid me even removed the wastegate to check for a tear in the diaphragm.
Thanks again for your help and I will go and proceed with banging my head against this desk.
Thanks to evilrotor for sending me that email as well.
05-12-06, 07:51 AM
#13
Originally Posted by nik
John has it right(and so do you Ian)
If you bring it to ottawa meet maybe we can try to figure it out. Are you coming?
If you bring it to ottawa meet maybe we can try to figure it out. Are you coming?
i completely disconnected everything to see for holes in the lines and when I reinstalled everything it worked. (Without looking at the hookup diagram) I just think I made a mistake when I pulled everything apart this winter doing the brake lines.I will not be coming to the ottawa meet which is to bad since I would like to see how your car is doing and hang out with the guys. This will be the first time I missed an ottawa meet other then when I was in europe.
05-12-06, 01:20 PM
#16
Originally Posted by eViLRotor
Ian too hardcore racer to hang out with us Tim Horton's Crowd...
its about gas consumption. I have most weekends booked for track days. I may have to take out a loan just to pay for the gas. LOL. Track fees are not bad. Its the gas..
Thread
Thread Starter
Forum
Replies
Last Post
jetlude
Single Turbo RX-7's
4
08-18-15 04:53 PM
