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Old 11-25-2004, 02:48 PM   #13
DarthChicken
Scooby Specialist
 
Member#: 9073
Join Date: Aug 2001
Chapter/Region: NWIC
Location: Hillsboro, OR.
Vehicle:
2006 ariel atom
wrb/bbs gold frame

Default

I have a 2002 wrx that I've had a hydra on since the 1st of August or so. I'm also running AVCS (I've got V7 heads). I ran a hillclimb within a week of getting the unit and came in 19th place out of 51 cars, having never run a hillclimb before and only getting 1 of my 4 runs because of wrecks on the hill that slowed the entire event. THATS how easy this unit is to use.

Currently the AVCS is not closed loop, but it sounds like it will be very shortly - this is great news. Right now, you set the solenoid duty cycle to a number, and you can't tell what timing your getting, ie open loop solenoid control. No feedback. Initially the AVCS maps sent out with the first WRX versions were WAY off - ie on the dyno having AVCS cost me 110whp. Unplugged it, retuned and went from 250whp to 360whp (I knew something was wrong, but I didn't think it was THAT far off! LOL). Let this be a lesson, do NOT run 100% AVCS duty on boost, it doesn't work

The solution was to log both an STi and a subaru with V7 heads - the AVCS map was basically copied from logs from those two cars (at least my map is, not sure about the STi maps). I have yet to make it back to the dyno, but will be doing so shortly - but I can tell you, I have a slowboy GT30-14 turbo (its basically a GT35, 65lb compressor wheel) and the car will accelerate from about 2200rpm, with full boost around 4000rpm in 4th gear. So AVCS is definitely pulling before boost is.

I would assume (and I'm sure Phil will correct me if I'm not ) that the closed loop will allow you to set an AVCS timing number instead of a solenoid duty number. 30 degrees AVCS at 2500rpm/460mm vacuum. That sort of thing (its a 3d map, RPM vs. load).

Have patience guys... this thing kicks butt. Its SO much better than the stock ECU ever was just driving around town - so much smoother, no hesitation, no bucking at low throttle inputs, no backfiring... the car runs SMOOTH which is awesome considering the power output I'm at I have yet to hear of anybody that has gone through Phil and is disappointed with their unit. That says something....
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