Apexi Power Fc

[paulr33]

oh well it guess it proves to not listen to hype then. if it works then thats all groovey

how do you find the gearjudge settings?

[Bl4cK32]

Havent bothered with the gearjudge yet. I'll wait till my big turbo is on, then i'll get a fine tune of the pfc and the boost controller.

The avcr though with its rough tune can hold 1.1 bar flat.

Edited January 6, 2006 by Bl4cK32

[paulr33]

yeah any boost controller should be able to do that though, without a tune, user simply dials in pressure and thats it, some require duty to be set but it shouldnt any more complicated. there were always stories of the avc-r spiking lots and running unstable boost. if this is not the case with yours then its all good

[Cubes]

Thats the thing Paul... A lot of the ebc's won't hold boost to redline IF the turbo is running near its limit. The EBC MUST be able to learn the duty cycle requried in order to hold the boost you dial in.

I used to run a Blitz SBC-iD EBC, it had the usual manual setup which uses a fixed duty cycle and gain. Then there was the auto where it used a fixed gain but would learn the duty cycle required through the whole rpm in order to hold say 15psi.

The Blitz SBC-iD has a little picture of the dual solanoid and what its doing, half open fully open or closed etc.

As RPM increased you could see the solanoid go from almost all the way open at peak torque then from then on it would slowly close holding the dialed in boost all the way to redline.

Selecting manual mode and dialing in a fixed duty and gain which is the basis of how the majority of EBC's (HKS, the lower spec Blitz items and a few others) work boost would tail off at high rpm. Run a big turbo that won't have flow issues on your motor on you don't need such an ebc, the manual types will do just fine.

My Blitz SBC-iD in auto mode did have a few issues with spiking as the AVCR also has IF not setup correctly.

It has to be setup on a dyno in fourth gear taken from low rpm all the way to redline, this can't be done on the street for obvious speed restriction reasons.

Set it up in second or third as I attempted and it would occasionally spike when jumping on the throttle around peak torque or when loading it up from low rpm.

I've had a little play and monitored bl4ck32's boost curve, I was very much impressed with the stability and lack of even the slightest spike.

The only reason to grab an AVCR over the PFC EBC is the extra features of the avcr, they both work exactly the same way, not one will hold or build boost better than the other. It is definitely worth while when running a decent 250+rwkw IF you are having a few issues with traction and have already sorted suspension/tyres.

So as with everything.. its all in the setup/tune.

Edited January 6, 2006 by Cubes