What boost controller is recommended for the EJ20 WRX? I have considered both HKS and Greddy units, but I am confused as to purchasing a "fuzzy logic electronic unit" or an "electronic solenoid valve controlled unit". For example both the Greddy Profec A and Profec B seem appealing, but which is easier to program, control, install, and use with possible future upgrades? Any advice is priceless, thanks!

 

I believe Nito is running a boost controller to stunning effect, and he also sells 'em. Maybe worth dropping him a mail, or giving him a bell? His website is

 

JayGold,

Nito helped me install my HKS EVC 4, and if you follow the link below, you see the instructions and the pictures from the install! The installation is very straight forward, and took about 20-30 minutes to set up. It took longer to find a road to redline in 3rd, than it did to set up!!!

I'm very happy with the EVC, and although it's only holding 1.18bar/17.1psi, the difference is incredible.

 

Not sure about Blitz (seems like the new SBC-ID works the same way as the DSBC... bleah), but on the Apexi AVC-R, what you described as spike is a feature.

You simply choose what boost you want to run and at what RPM, and the AVC-R will learn the solenoid duty cycle required for that curve. It's possible and easy to program different boost levels at different RPMs at different gears. Installation is somewhat more complex than the usual Profecs and EVCs because you need to splice into the ECU loom to tap speed, RPM and TPS signals. It's the collective information from these sensors that enables the AVC-R to have all this flexibility. Add data-logging, optional injector duty cycle monitoring and the coolest display on earth to the list, and you have the best EBC in the market at the moment.

 

I use an APEXI Boost controller in conjunction with an APEXI Fuel controller. Its a lovely piece of kit. I'll try and get some photos from my digital camera tonight.

Cool display as mentioned :-)

Running 1.3 bar on a UK94. Been fine for about a year now. NUL + Millers CVL or SUL, or if I've the girlfriend in I run 0.7bar.

Mark

 

Mark,

On the Apexi AVC-R how well does it hold boost in your current setup ? I have learnt to accept that most EBCs spike a little (even these aren't perfect) but compared to the factory boost solenoids, they almost are

I have friends who run Blitz DBSC with great success. They set to 1.3 kg/cm³ and only spiked to 1.32 kg/cm and the beauty is boost hits this target in every gear !

Jan

 

Is an AFC necessary with EBC? if not does it give any extra power, also are they DIY fit? The HKS EVC unit appears to be simple to fit

 

Blackscooby,

I have the AVC-R fitted and was wandering how yours was plumbed in. Does the APEX solenoid (the control box under the bonnet) T-off the compressor to wastgate pipe or does it replace it? ie is the restrictor still in place in the compressor pipe?

I`m having some problems with boost spikes and fluctuating held-boost.

I hav`nt had time to play with too much yet but was just wandering ref the installation.
I have mine connected directly from the compressor to the wastegate......

 

Mark

You say you are running 1.3 bar on a UK spec car. IS that safe.. I am running 1.15 bar on my UK MY00.. I have samco hoses and a unichip as well as an EVC IV..

From your experience, would you say I could up this. Won't hold you to it if I blow my engine.

Jon

 

Is 1.3 bar safe ?

All I can say is that its a darned sight safer than it used to be running a bleed valve and approx 25PSI boost during hillclimbing. Blew a piston (and the bolts which hold in IC to its mountings )

Was going VERY well just before it went bang .... Literally smoked all 4 in second gear out of bends on the hillclimb. Looked and sounded very impressive..... UNTIL the inevitable happened. Didn't sound or look too pretty then though

Had the engine rebuilt with Cosworth Race pistons and had the APEXI system setup.

Been running 0.7bar on low boost and 1.3bar on high boost. I can't say what is safe for your car ~ I wouldn't dare !!!!

I think that sometimes it does spike. I've seen as high as 1.32bar...and once 1.40bar. Even made me look down at the APEXI unit to see what the hell happened. Its NEVER done it since. Huge scream from the turbo, and it rocketed forward...... :-)

I need to have it set back up again as the boost seems to oscillate on Setting A. I think it needs remapping.

I've got some pictures if I can host them on BTINTERNET.

Cheers

Mark

 

Try the pictures listed here....