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Apexi Power Fc Boost Controller

Nic19

By Nic19,
in Engines & Forced Induction

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Cubes Grand Master

Cubes

Posted
Posted
electronic units have brains

Some do.

Some are nothing but a glorified manual boost controller. i.e simply set a gain and a duty cycle.

The better EBC's 'learn' what duty cycle is required in order to hold a given boost pressure. (AVCR, PFC EBC, Blitz SBC-id, Greedy Profec EO-1 and a few others)

The Jaycar boost controller allows you to manually tune the duty cycle through various rpm points; which can be very handy depending on what your goals are. :D

Cubes Grand Master

Cubes

Posted
Posted

The PFC boost kit is good if you want just a cheap boost kit that holds boost well.

For a higher powered car where you want maximum response the avcr is a better bet as you are able to fiddle with individual gear gain values etc.

Sydneykid Grand Master

Sydneykid

Posted
Posted
For a higher powered car where you want maximum response the avcr is a better bet as you are able to fiddle with individual gear gain values etc.

Simple answer, if I don't want as much power, I don't psuh the accelerator down as far. I don't care how smart the boost controller is, I KNOW that I am a lot smarter.

:P cheers ;)

Cubes Grand Master

Cubes

Posted
Posted
Simple answer, if I don't want as much power, I don't psuh the accelerator down as far. I don't care how smart the boost controller is, I KNOW that I am a lot smarter.

;) cheers :(

Maximum response per gear not less. :P

For a higher powered car where you want maximum response the avcr is a better bet as you are able to fiddle with individual gear gain values etc.

Its not so much an issue with a stock turbo'd car.

Although not considered high powered lol I experienced issues when running the lazy vg30det turbo on my old rb20det.

I was running a I was running a Blitz SBC-ID in Auto mode; learning was done in 4th gear as it should.

First gear just wasn't snappy and didn't reach the boost target; raising the gain value had first gear boost build better not to mention it also reached the boost target but caused issues in the higher gears. I could see an application for the AVCR in this instance.

Sydneykid Grand Master

Sydneykid

Posted
Posted
Maximum response per gear not less. :P

Its not so much an issue with a stock turbo'd car.

Although not considered high powered lol I experienced issues when running the lazy vg30det turbo on my old rb20det.

I was running a I was running a Blitz SBC-ID in Auto mode; learning was done in 4th gear as it should.

First gear just wasn't snappy and didn't reach the boost target; raising the gain value had first gear boost build better not to mention it also reached the boost target but caused issues in the higher gears. I could see an application for the AVCR in this instance.

If the boost controller is allowing the wastegate to open before the boost target is reached, then it's a BAD boost controller. That's either ZERO or 100% solenoid duty, it should be fully open or, in the case of an IEBC, fully closed. Regardless of what gear it is in, it's still a BAD boost controller if that's not the case.

;) cheers :(

Cubes Grand Master

Cubes

Posted
Posted
If the boost controller is allowing the wastegate to open before the boost target is reached, then it's a BAD boost controller. That's either ZERO or 100% solenoid duty, it should be fully open or, in the case of an IEBC, fully closed. Regardless of what gear it is in, it's still a BAD boost controller if that's not the case.

:D cheers :D

Oh Gary Gary Gary.. :w00t:

A boost controller MUST start feeding a little pressure to the wastegate before the target boost pressure is reached. This is the gain value. If it were to be closed until its reached the target boost then slams open it will spike. There's no if's, no buts.

The gain value is to compensate for the slight delay in the wastegate slamming open.

You know this..... :w00t:

Sydneykid Grand Master

Sydneykid

Posted
Posted
Oh Gary Gary Gary.. :w00t:

A boost controller MUST start feeding a little pressure to the wastegate before the target boost pressure is reached. This is the gain value. If it were to be closed until its reached the target boost then slams open it will spike. There's no if's, no buts.

The gain value is to compensate for the slight delay in the wastegate slamming open.

You know this..... :w00t:

Well, yes and no.

Yes, but I thought you were talking about the difference before boost started building ie, when the wastegate should be 100% closed anyway.

And no, these days with the fast acting solenoids, short actuator hoses and a correctly sized wastegate (diameter and spring rate), the opening doesn't have to be that premature. A couple of psi is all you need, and you shouldn't notice it anyway, if you have the timing right.

:D cheers :D

Cubes Grand Master

Cubes

Posted
Posted
Well, yes and no.

Yes, but I thought you were talking about the difference before boost started building ie, when the wastegate should be 100% closed anyway.

And no, these days with the fast acting solenoids, short actuator hoses and a correctly sized wastegate (diameter and spring rate), the opening doesn't have to be that premature. A couple of psi is all you need, and you shouldn't notice it anyway, if you have the timing right.

:w00t: cheers :w00t:

I was sure it was a misunderstanding which is why I explained myself a little further. :D

Even with fast solenoids and short hoses there is still going to be a bee's dick delay; which is where the gain value comes in to it. An attempt; as you know to absorb the delay without noticeably smoothing of the boost curves elbow.

A nice sharp boost curve induces that wheel spin (which can be a bad thing) and that oh so lovely snap in the back we all love.

My fiddling found a gain value that was tweaked as close as possible before spiking occurred had a nice sharp smack in the back when boost came on as one loaded the car up from low rpm. A gain value that was low or not tweaked had a noticeably but not by bugger all smoother feel to the boost snap.

I guess really its all about the driving experience; I'd be very surprised if it made any difference to acceleration performance.

Cubes Grand Master

Cubes

Posted
Posted

Bang for buck you can't go past the Apexi PFC EBC as its dirty cheap from nengun and perfect run etc and as stated above is a duty cycle learning type boost controller.

Personally I would prefer the Jaycar EBC over the Apexi PFC EBC as its more flexible with its only downer being the ugly controller (that you can remove once setup anyway).

For more features (gear gain settings, gear boost settings and a few others) the Apexi AVCR is a good option.

The Mafia Grand Master

The Mafia

Posted
Posted

I want to get the powerfc boost controller kit for a few reasons:

1. Its easy to install, no extra crap on the dash

2. I have a 7psi actuator, and I'm using the $22 boost controller to bleed that to 18psi

3. I want something that I can set at higher boost levels, safely.

4. I want something that won't spike, or shake the shit out of the Boost guage needle.

I like the idea of the powerfc boost control kit being $350 too...

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