avc-r or mbc?

[grcuadros]

i went to install a FCD today at the shop and the mechanics were tellin me i shouldnt install it unless i have an electronic boost controller. they said my mbc (joep) was probably leaking boost and thats why i was hitting the fuel cut after i installed my hiboost fmic. the boost reading on the gauge is 5 psi and i still hit it when its cold out. what do you guys think, are they just trying to scheme me into buying a more expensive part from them? basically what they were saying is buy something that holds boost better so atleast i actually know what im at, and then if the problem continues we'll work from there. it sounds logical to me but i dont wanna fall into some trap and pay $350 and pay another however much to install it and take out my mbc and boost gauge etc. opinions? thanks.

 

[casper]

You have a JoeP MBC set at 5psi? Cold air = happy intercooler = more boost, but I don't see how the JoeP is set at 5psi, unless mine is just ghetto. The lowest setting on mine is 10psi, and it spikes like a hobitch cuntsnap to 15psi or so in certain gears.

All honesty, until you build up your engine FCD is kind of a bad idea unless you have it setup to turn on/off. 90% of the motors I've seen blown on this site were running FCD, and I've been running 10-12psi daily for a few months now with no problems, but no FCD. It's your call though. I say spring for a GReddy Profec B Spec II, set it where it wont overboost that much, and leave your FC until you build the motor up to handle the extra surge of boost.

 

[grcuadros]

what do you think of the apexi avc-r? the boost gauge is showing 5 but i dont think its set it that. im gonna fix the boost leak and see if i still hit fuel cut, if not im set. if i do im gonna get a different boost controller and work from there. the reason i ask about the apexi is because you can tune the fuel and stuff with it right? thanks.

 

[Focus]

JoeP MBC was what caused my rod to bend. It spiked at 17psi out of nowhere. Next thing I know, clack, clack, clack coming from my motor. I was lucky the rod didn't come out the side of the block.

An electronic boost controller is a very wise investment. I suggest the ones with the new style valves such as the AVC-R or the Greddy Profec E-01

 

[mazdaspeedpower]

Ahh, I was just searching, and wondering, which I should get if I get a boost controller...there is the Apex AVC-R, the greddyProfec B, and the Greddy Profec E-01..I dunno, they all seem like good choiced, the Profec e-01 has the e-manage, but is that working for our cars? the Apex AVC-r seems to be a better choice than the Profec B, and seems to be good to set boost higher for lower rpms/lower gears to help prevent the boom factor. Does anyone have any real world experience with these? What would you guys suggest(hopefully this will help me, and grcuadros with EBC choices)..thanks guys

 

[mp5jeff]

mbc + internal wastegate = the sux, EBC much better...faster spoolup, no spikes, etc..

 

[mp5jeff]

if you can only boost 5psi with the mbc, you most likely have it installed incorrectly.

 

[Focus]

Ahh, I was just searching, and wondering, which I should get if I get a boost controller...there is the Apex AVC-R, the greddyProfec B, and the Greddy Profec E-01..I dunno, they all seem like good choiced, the Profec e-01 has the e-manage, but is that working for our cars? the Apex AVC-r seems to be a better choice than the Profec B, and seems to be good to set boost higher for lower rpms/lower gears to help prevent the boom factor. Does anyone have any real world experience with these? What would you guys suggest(hopefully this will help me, and grcuadros with EBC choices)..thanks guys

I had the AVC-R before and it is a good piece of electronics. Gear selecteable boost and RPM selecteable as well. One of the wires going to the valve shorted out and it killed my whole AVC-R

I now have the Profec E-01, fancier display but no gear selecteable boost control. Also an excellent unit.

 

[grcuadros]

I had the AVC-R before and it is a good piece of electronics. Gear selecteable boost and RPM selecteable as well. One of the wires going to the valve shorted out and it killed my whole AVC-R

I now have the Profec E-01, fancier display but no gear selecteable boost control. Also an excellent unit.

did you ever tune the car with the avc-r? im just wondering. ive made up my mind and im gonna take out the joep and purchase the apexi avc-r unit. ill let you guys know how it goes, ill put the order in tomorrow and we'll see how it goes from there. thanks for the input, it helped.

 

[t3ase]

The board sponsored my AVC-R but I haven't put many miles on with it due to a transmission issue.

The AVC is a VERY nice unit and VERY customizable. Keep in mind, very customizable is good if you know what you're doing and not so good if you don't. You have *many* things to play with to get it tuned just right. It did not, however, take long for me to set it up to boost to what level I'm at without setting up gear/rpm dependant boost and such. However, once that primary level is set, you have an extreme amount of tuning to do for it to be fully utilized.

The JoeP is a VERY reliable unit, when installed correctly. Not saying yours or any other person's wasn't but I've *never* had issues with mine when it was in. Also, the FCD is *not* to be used if you cannot risk blowing your engine, period. I can't risk it but I have it in. I do know, however, that my engine's about to go. Sad but true.

Anyway, it sounds like you have a shop on your side so enjoy it and trust their knowledge. If you can't trust them, do it yourself but be careful.

 

[FSDET]

what exactly can u tune with the avc-r ? other then boost per gear.
Focus: i thought with the greddy e-01 u can set diffrent boost at every gear just like the avc-r no ?

 

[Focus]

what exactly can u tune with the avc-r ? other then boost per gear.
Focus: i thought with the greddy e-01 u can set diffrent boost at every gear just like the avc-r no ?

Not that I have seen. I will check it again.

 

[FSDET]

cuz it says it does on there website ...

 

[t3ase]

what exactly can u tune with the avc-r ? other then boost per gear.

The instruction book is in my car which is at the dealer right now so I can't be specific. However, there are *several* screens with adjustments you can make.. Whether they are for unit tuning or the actual boost tuning, it's quite a bit of work to get it all set if you're like me and you're doing it all yourself.

From looking through the online manual:
Boost/Duty: Boost and Duty Cycle levels setup
Scramble: Scramble Boost setup
Ne-point: Engine RPM Specific Boost Control setup
F/B Speed: Feedback Speed setup
Learn Gear: Gear Based Learning
Start Duty: Initial solenoid valve duty cycle for boost control in gear based selection

Basic setup = Set desired boost level and solenoid valve duty cycle
Advanced setup = Set gear based, engine rpm based, rpm based solenoid valve duty cycle settings and then gear based learning.

Have a look at http://www.apexi-usa.com/productdocumentation/electronics_savcr_ins.pdf if you haven't already and you're interested in the AVC. If you have any install questions, I can try to help.

 

[FSDET]

no we were talkin about the profec e-o1's options. i was wondering if it can set boost per gear

 

[t3ase]

what exactly can u tune with the avc-r ? other then boost per gear.

 

[FSDET]

lol i forgot i asked 2 question. but u qouted me on my second question