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Old 02-24-2002, 01:47 AM   #1
2OHOH2WRX
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Thumbs up APEXi AVC-R Electronic Boost Controller

First impressions: This thing rocks!

fairly easy to install (just takes time), fairly well documented, and complete (could use more of that small diameter tubing).

OK, so going from a $10 homemade MBC to a $450+ whiz-bang computer should be an improvement, but I wasn't expecting >this much< improvement. Even with basic settings this EBC makes my car feel entirely different, and better. Serious grin factor. Seems like my Vishnu Stage 0 is finally stretching its legs

I haven't decided on where to put the display just yet, so for the moment it's tucked neatly under the ashtray. Many people have posted their intall pics, but I simply haven't decided where to do mine...
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Old 02-24-2002, 02:00 AM   #2
porkchop
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I'm still trying to decide between this and the Blitz SBC-ID. Did you have the same dilima?

on one hand the AVC-R looks good from the pictures, how is it in real life? hows the screen?

hows the features?

and how long was the install? and difficulty lvl?

sorry about all the questions...

Thanks

Tommy
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Old 02-24-2002, 10:46 AM   #3
2OHOH2WRX
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For me it was love at first sight

Seriously though, after taking a ride in less-built car than mine, but with the AVC-R, I was sold. My car pulls so hard now it really is like new. Using the crude timer in my HKS TT Type 1, I got a 5.12 0-62 (0-100km) last night, and that was with basic tuning and very little experience in launching. The boost builds and just stays up there

The display may even be better than what you may have seen in pictures. It's self-dimming, clear both at night and in full sunlight, and with all the montioring modes, works very, very well

The install was easy except for one thing: getting the wiring harness to the passenger compartment. Hooking up the ECU wasn't too bad, but I took my time, soldering, using heat-shrink tubing and pro-grade 3M tape, zip-tying, and using wire loom to do it right the first time.

Hmm, I think I'll get the cam and take some pics of the individual components, and maybe write up some tips too...
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Old 02-24-2002, 11:25 AM   #4
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Pressure sensor
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Old 02-24-2002, 11:27 AM   #5
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Pressure sensor too (pronounced two )
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Old 02-24-2002, 11:29 AM   #6
2OHOH2WRX
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Solenoid valve
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Old 02-24-2002, 11:30 AM   #7
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Wiring harness pass-through point (PITA)

Had to remove the long plug, tape the whole thing up, tape a wire coathanger to it, then feed through the slit that I cut...
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Old 02-24-2002, 11:32 AM   #8
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Last but not least, the display. It's temporarily under the ashtray. Good spot, though, so I might remove the rubber foam tape and make the location permanent
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Old 02-25-2002, 02:14 PM   #9
porkchop
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wonderful!

thank you so much for the reply...

if I can ask you for one more favor...can you give me some measurements of the controller box it self?

I want to see how much room I would need inorder to mount this thing..

Thanks again

Tommy
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Old 02-26-2002, 12:15 AM   #10
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Display dims:

5.25" wide
2" tall
1" deep
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Old 02-27-2002, 04:45 PM   #11
geronimo
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my understanding is that the Blitz sbc id has a better selenoid.. other than that what are the difference. Has any one got the Blitz unit?

I do like the look of the Apexi better.
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Old 02-27-2002, 05:42 PM   #12
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I've heard >rumors< of the Blitz solenoid being better, in that it supposedly holds up to 38psi or something along those lines. I've also heard rumors that the Apexi holds up to 30psi. That being said, I don't see myself needing anything over 30psi; chances are anything I do to this car won't be over 27psi, ever, if at all.

The main advantage that people mention about the Blitz is its compact size, relative to the Apexi (I buy that argument - what was Apexi thinking when they designed the oversize housing???). I, however, don't see the size of the Apexi as a significant detriment relative to its (so far) stellar functionality.
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Old 02-28-2002, 10:22 AM   #13
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i was wondering what you set your boost at? and what can you set your boost at for a stock wrx, casue i know that if set to high you can do serious damage to the engine -thanks gino
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Old 02-28-2002, 07:31 PM   #14
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Right now I'm running at manifold pressure, or ~8lbs

Yeah, really. This is because I have a lot of stuff getting installed soon, and I'd rather bump up slowly rather than going all out.

I found out most of the following by searching the iClub:

- the WRX turbo can be "safely" boosted up to 17lbs, aka fuel-cut; however, don't rely on the fuel cut to save you if you screw something up - I spiked at 23psi once when I first installed a MBC, no fuel cut. After changing my underwear, I took necessary precautions to never have that happen again.

- the WRX turbo starts being inefficient around 19psi

- most have found that the "sweet spot" for the WRX turbo is around 15.5 - 16psi, and >that< is what I normally run mine at; very nice, with plenty of safety

It is somewhat debatable what causes "serious damage" to the engine, but the most common potential risk is running too lean (not enough fuel), which turns the insides of the combustion chamber into an oversized acetylene torch. Things blow up, melt, etc, most often due to lack of fuel.
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Old 03-28-2002, 12:07 AM   #15
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I have a lot of complaints about the AVC-R, but I've kept it because it serves its function reliably.

My wishlist for the next generation of the AVC-R:

- Smaller increments for boost setpoint (< 0.05 kg/cm2)

- Less bulky display as mentioned ... why the heck didn't Apex think to at least make it single DIN sized.

- Option to unplug the display from the harness wiring

- Easier way to switch between A and B maps on the fly (sucks to have to hit 2 or 3 buttons in sequence before you can change maps).

- More than just 2 maps + off boost.

- More sophisticated learn gear or an option to adjust duty cycle maps for different gears, not just the start d/c.

- Better graphing & replay... at least put numeric units on the graph axis, and a numeric readout of boost value while graphing.


A lot of these features are already incorporated into the SBC-iD.
The perfect electronic controller would combine the best features of both the SBC-iD and the AVC-R ...
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Old 03-28-2002, 01:00 AM   #16
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Fubaru - the AVC-R is not perfect, but like you said, it does what it does well. I like most of your ideas (DIN size, detachable, moew profiles, etc), but then I like the STi and GT-R - in other words, it's nice to dream, but...
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Old 05-14-2006, 03:49 PM   #17
Kushmasterh
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Quote:
Originally Posted by 2OHOH2WRX
For me it was love at first sight

Seriously though, after taking a ride in less-built car than mine, but with the AVC-R, I was sold. My car pulls so hard now it really is like new. Using the crude timer in my HKS TT Type 1, I got a 5.12 0-62 (0-100km) last night, and that was with basic tuning and very little experience in launching. The boost builds and just stays up there

The display may even be better than what you may have seen in pictures. It's self-dimming, clear both at night and in full sunlight, and with all the montioring modes, works very, very well

The install was easy except for one thing: getting the wiring harness to the passenger compartment. Hooking up the ECU wasn't too bad, but I took my time, soldering, using heat-shrink tubing and pro-grade 3M tape, zip-tying, and using wire loom to do it right the first time.

Hmm, I think I'll get the cam and take some pics of the individual components, and maybe write up some tips too...
For passing throught the passenger side gromet I would suggest not doing. mainly because of the severe heat dispersed from the downpipe and could easily melt the harness in no time. It is just so much easiler to take the wireing and harnesses in the cabin and feed the plug in harness through the driver side gromet (Just use a hand held razor blade to make a + in the gromet for easy pull through) hook them up to the selinoid and Press. Sensor and neatly zip-ti them to coolant line that runs near the firewall for a steathly install of the wires, DONT WORRY!! you will have plenty of enuff wire to reach the passenger side footwell to access the ECU. Now just fish the left over wire in the cabin behind the center console (nothing has to be taken out or removed as there is a small gap next to the plastic carpet protector to the right of the gas pedal and you can see right through to the passenger side footwell. Hope this helps.
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