AVCR Question

[carlo]

My AVC-R does a few weird things. Mainly in the overboost department. I have set it to run .65bar however at times it spikes up to .75 or .80 bar before dropping to .65.

a. Is this normal??

b. Have I got it hooked up right. I have a vaccume line comming off the "surge tank" which has a t piece. One line goes to the pressure sensor the other goes to the BOV.

the apexi documentation is kinda crap..

I am assuming the Air Filter Pressure Regulator is the BOV right.

[MrNismo]

I think it's the problem of the setting part. Try to lower the duty cycle. If you're using the gear dependent self learning mode, try to set the feedback speed faster on the gears that you're overboosting, or you can either lower the start duty on that particular gear.

[carlo]

Im just using its simple mode. The boost holds, its just the initial spike. I will try dropping the duty cycle tho.

[Amaru]

Drop the duty cycle down. When the AVC-R thinks the duty cycle is correct (when its not overboosting) it will change from three numbers (e.g 055) to ***. Then just run it in self learning mode for a while to self tune it a bit and it should all be good.

[cameron]

Whats the T piece for ?

Are you running a external wastegate or stock set-up ?

For stock set up it should go from your intercooler pipe/turbo/serge tank or were ever you have it plumbed into. That goes to [NC] on the avc-r solinoid and [COM] goes to turbo actuator.

Check your F/B control if this is too high you will get spikes. And as other's said adjust your duty cycle to get your boost to what its set at.

Jun

[Abo Bob]

This looks like a good thread to put my question into.

I've drawn a graph (using ms paint, please forgive me) of my boost curve on the road.

It doesn't do this on a dyno but it does on the road. It's most pronounced in 2nd gear but does still do it in 3rd.

I have the boost duty set quite high because it struggles to get to the set boost. (0.85 bar) It often peaks at 0.78 or so even though I have it set to 0.85.

[cameron]

What is your start duty set to.

This can able you to spike your boost or under spike it. might help level out your graph a little bit.

[carlo]

T piece is for splitting the vaccume line off the plennum / surge tank. 1 goes to the AVC-R sensor the other goes to the BOV.

I will sus out this F/V control you speak off. Might also try dropping the duty cycle, however since the boost is level after the spike not sure if thats the cause. Its almost like it delays the opening of the waste gate.

[Beer Baron]

My AVC-R does a few weird things. Mainly in the overboost department. I have set it to run .65bar however at times it spikes up to .75 or .80 bar before dropping to .65.

a. Is this normal??

b. Have I got it hooked up right.  I have a vaccume line comming off the "surge tank" which has a t piece. One line goes to the pressure sensor the other goes to the BOV.

the apexi documentation is kinda crap..

I am assuming the Air Filter Pressure Regulator is the BOV right.

In that diagram "Air Filter Pressure Regulator" is acutally 2 things "Air Filter" refers to the small plate shapped thing to the left of the text and it's the air filter that goes in the vacuum line feeding pressure to the pressure sensor (it comes with the kit). "Pressure Regulator" refers to the Fuel Pressure Regulator.

HTH mate

Richard

[carlo]

Ahhhhhhhhhhhhhhhhh!

I got you dude.. yeah. those little clear air filter things!!

BING WAHHHHH

might do some reworking of these vaccume lines.. see if it helps the spike issues..

[Abo Bob]

What is your start duty set to.

This can able you to spike your boost or under spike it. might help level out your graph a little bit.

It's not ramped at all at the moment. I might try easing it off in the lower revs so that it doesn't hit so hard.

Just feels quicker with a hard hit of boost.

Ta.

[Beer Baron]

Ahhhhhhhhhhhhhhhhh!

I got you dude.. yeah. those little clear air filter things!!

BING WAHHHHH

might do some reworking of these vaccume lines.. see if it helps the spike issues..

Yep, that's the ones. Man you got gipped though if they are clear, my trust thingy came with green ones :looney: yeeha!

The re-working might help, but it sounds like it's most likely a tuning/programing problem.

Richard

[Roy]

Any idea where i can pick up those filters. Minde are sitting in a box in Sydney, adn want to grab some locally in Melb.

[Beer Baron]

hmm, I don't know of any places in melbs but any place that sells all that kind of nice flashy stuff (avcrs etc) would have 'em. I know in sydney I'd go to somewhere like advan, or UAS, but if none of the local shops have them you could mail order from syd, or Japan for that matter.

Richard