Mark has kindly taken the time to send me this info, hope you find it useful
The Apexi AVC-R is a digital actuator control. It hooks in to the ECU and controls the actuator based on readings from the ECU. These readings can
include:
Injector Duty
RPM
Gear (not sure where it gets this reading from, I haven't hooked it up yet)
Speed
Throttle %
It will show graphs/dials for duty, throttle %, boost (bar) etc... and lets you control exactly how, when and how much boost you use.
Example:
My Rover 220 tubby boosts at about 0.7 bar as standard, from 2200rpm to 6500rpm.This IMO is not a nice way to boost... I can get full boost at just over 2000rpm in first! that's just not safe (and certainly doesn't do acceleration any favours when you're standing still)!! So what I've done is altered settings so that the boost comes in at about 0.3bar at 2000rpm (the Apexi lets you control in ranges of 500rpm), gradually increasing to 0.9 bar at 4500rpm.I get far more traction this way. Ideally I'd hook up the gear sensor and speed sensor so that I could use these to ensure full boost came in earlier in higher gears, but for now it's fine.
I should also point out that while the Apexi will control boost up to 2bar(IIRC), that may not be safe for your top/bottom ends. It is however, better than a bleed valve in that it doesn't cause pinking
There are lots of funky toys to play with - peak readings etc... and the graph allows you to see readings from a few seconds ago, so you don't have to spot a change in reading immediately as with a regular boost guage. You also have the ability to save 2 different settings, one for daily driving and one for track, for example.. plus there's always "Off" to turn it off.
Installation is relatively simple... there's just a few wires to hook into your ECU (soldering), and a few other things to go under your bonnet. There's plenty of cable to mount the apexi anywhere inside your car that you fancy too (I have about 10ft of the stuff tucked behind my centre console).
All in all, a very cool toy
There are a couple of pics of what we did under the bonnet, and how it was mounted, here:
http://www.appointmentmanager.co.uk/photos/RoverCoupe/Apexi
HTH guys
Mark