Hitting fuel cut with AVCR

dbsupra90

toonar
Apr 1, 2005
2,374
0
0
indiucky
IJ. said:
Dave: If his base is 1.13 on the WG alone how is he going to make 1 bar? ;)
(If he's reading the AVCR 1.13=16Psi)

i like turtles.

seriously tho, if something was goofy in the setup or hookup, it could be off from really being "off" on the controller.

best bet honestly would be to get an inline barb and bypass the controller all together and see how it behaves.

hmm, now that im looking back, i see it was boosting high before even the install. i missed that part in the middle. did you get just the exhaust or the dp too?

not even a magic boost controller can lower your boost from the wastegate base boost level. id bypass the controller w/ the barb like i was talking about just to eliminate that part of the equation. then make sure your actuator isnt binding/bent/etc.
 

2543arvin

Moving to Japan!!!
Nov 30, 2006
879
0
0
Jacksonville, NC
dbsupra90 said:
ok, just making sure 100%

what i would do at this point is do a full reinitialization of the unit, then go back and set everything up again in the configuration.

then, set the boost at 1bar, duty at something real low like 10% and see what happens. dont forget there is a record and playback feature on the avcr. its handy to use to see how the boost comes on and if it is overshooting.


Is there anyway you could PM me the settings you would use? The only thing adjusted is the boost and duty cycle. My start cycle all read +/- 0. Is that a problem?

Also can you explain the record and playback feature? How do I use that. If there is anything you can do to help, I would appreciate it.

You can call me if that makes things easier to explain also....252-646-6497.

Thanks you guys,
Brandon
 

2543arvin

Moving to Japan!!!
Nov 30, 2006
879
0
0
Jacksonville, NC
dbsupra90 said:
i like turtles.

seriously tho, if something was goofy in the setup or hookup, it could be off from really being "off" on the controller.

best bet honestly would be to get an inline barb and bypass the controller all together and see how it behaves.

hmm, now that im looking back, i see it was boosting high before even the install. i missed that part in the middle. did you get just the exhaust or the dp too?

not even a magic boost controller can lower your boost from the wastegate base boost level. id bypass the controller w/ the barb like i was talking about just to eliminate that part of the equation. then make sure your actuator isnt binding/bent/etc.


I got BIC's DDP, Test pipe, and the 3.5 thunder catback. It changed the boost from 7 psi to what it is now.

As for bypassing the controller, when I turn the setting to OFF on the AVCR that is what that does....correct? When I did that it boosted as if I never hooked up the AVCR, but it still hit fuel cut. Thats why I think that it was just because of the low temps outside. I mean it was 35* today, much lower than the 70*, that I dyno tuned at.

But if there are specific adjustments that I can make with the AVCR to better control this problem then I would make them.
 

dbsupra90

toonar
Apr 1, 2005
2,374
0
0
indiucky
i no longer have this boost controller on my car, its on a friend's and he is out of town til later this week. it is currently setup for an external wastegate, but i can go back thru and do a step by step setup when he gets back if it will help. i have just been going by memory the issues ive had or helped with on the avc-r. it is a really nice boost controller, but it is kinda complicated and takes a while to get used to.

edit: i have heard of people having boost issues w/ the ddp if the wg flap hits the elbow. it wont open far enough to allow exhaust gas out fast enough and causes high boost.

do you have any type of wideband in the car? if so, you can always just leave it at the boost level you have it and tune around fuel cut. i could run 20psi on my lex/afc combo, even in cold weather.
 

2543arvin

Moving to Japan!!!
Nov 30, 2006
879
0
0
Jacksonville, NC
dbsupra90 said:
i no longer have this boost controller on my car, its on a friend's and he is out of town til later this week. it is currently setup for an external wastegate, but i can go back thru and do a step by step setup when he gets back if it will help. i have just been going by memory the issues ive had or helped with on the avc-r. it is a really nice boost controller, but it is kinda complicated and takes a while to get used to.


Yeah, I would appreciate that if you could. I really want to take this setup to the track on Sunday and see what kind of time I can lay down, so if you get the opportunity and feel like helping then that would be great.

As for the AVCR, yeah, a lot of people said that they didnt like it because it was too complicated for their setup, but I took that thinking that they never gave it much effort. But now I can see that this thing is going to be hard to figure out. Hopefully I will figure it out soon , so I can actually get everything out of it.
 
Last edited:

2543arvin

Moving to Japan!!!
Nov 30, 2006
879
0
0
Jacksonville, NC
dbsupra90 said:
i no longer have this boost controller on my car, its on a friend's and he is out of town til later this week. it is currently setup for an external wastegate, but i can go back thru and do a step by step setup when he gets back if it will help. i have just been going by memory the issues ive had or helped with on the avc-r. it is a really nice boost controller, but it is kinda complicated and takes a while to get used to.

edit: i have heard of people having boost issues w/ the ddp if the wg flap hits the elbow. it wont open far enough to allow exhaust gas out fast enough and causes high boost.

do you have any type of wideband in the car? if so, you can always just leave it at the boost level you have it and tune around fuel cut. i could run 20psi on my lex/afc combo, even in cold weather.


No I dont have a wideband. I have a narrowband, but I dont go tune off of it, its not worth it IMO. When I went to the dyno, I had to remove quite a bit of fuel beyond 5000 rpm. And since the weather is much colder, I figure that I would have to add some of that fuel back to run more boost.

Could it really hurt it to initialize my SAFC and see what happens? I mean the worst it could do is make it run rich and then I could just put back my settings.....

What would you do?
 

2543arvin

Moving to Japan!!!
Nov 30, 2006
879
0
0
Jacksonville, NC
IJ. said:
1st things 1st

Un hook the Vacc pipe from the gate and replace it as stock and verify that it's hitting the same boost on just the gate no controller plumbed at all.

I have done that. Even without the entire boost controller setup installed, it would still boost this high, just not so fast. I wasnt hitting fuel cut, because in the warmer weather it would only boost ~14 psi. Thats why I think that I may just have to tune it around this fuel cut like dbsupra90 was saying.

The cold weather sucks here.
 

2543arvin

Moving to Japan!!!
Nov 30, 2006
879
0
0
Jacksonville, NC
IJ. said:
Is it preloaded at all?
(just trying to rule out everything I can think of here but am starting to suspect bad boost creep)


Is what preloaded? Not sure what youre asking here, never heard the term used before....sorry.
 

jtran8

Supramania Contributor
Mar 29, 2007
199
0
0
wichita kansas
so your car ran fine before you installed BIC down pipe ? i was thinking about wastegate actuator mulfuntion , but then your car ran fine before though . BIC down pipe is a good down pipe , because it so good some time can cause boost creep on ct26 for some people . Porting wastgate is the only way to solve your boost creep problem . Apexi avcr can help to eliminate boost spike but not boost creep.
 

2543arvin

Moving to Japan!!!
Nov 30, 2006
879
0
0
Jacksonville, NC
IJ. said:
Arv: Is the rod on the actuator adjustable or was it really tight to bolt on?


It was really tight to bolt on.

jtran8- yeah, randy @ BIC said that some people need to port their wastegate to avoid overboosting with the DDP, but Im going back to Iraq in February and was hoping to do that when I come back.
 

suprajosh

New Member
Nov 6, 2007
47
0
0
37
anaheim CA
oh god... mine does the same thing, now i need to port that bad boy too???
-josh

didnt mean to hijack your thread sorry, just sayin' is all
 

2543arvin

Moving to Japan!!!
Nov 30, 2006
879
0
0
Jacksonville, NC
suprajosh said:
oh god... mine does the same thing, now i need to port that bad boy too???
-josh

didnt mean to hijack your thread sorry, just sayin' is all
No problem at all.....

If porting the wastegate is truly an easy task, then I may decide to do that before the deployment to see if that will help out....Does anyone have a thread on it or pictures????
 

jtran8

Supramania Contributor
Mar 29, 2007
199
0
0
wichita kansas
I used to have bad boost creep like yours , and i ported mine so i have experience . It's easy and only take few hours , the thing is you have to use the right tools and make sure do it right way or you'll waste your time. If you don't mind to remove turbo , i don't mind helping you out .