Quote:
Originally Posted by Dean
Have you considered seeing if you can get a decent tune with the stock ECU? I know the Hydra has a boatload of features, but does the stocker offer any safety over the Hydra?
Oh yeah, you have STI heads now and the '02 ECU doesn't know about AVCS.... That is the primary reason you switched, isn't it?
It is probably worth a bit more effort to get a slightly more usable tune that includes open loop on the stocker anyway for smog season and such. just a thought. At least log your closed loop stuff and get the intake map worked out. I don't know if that map translates to the Hydra, but getting a good intake map is pretty critical IMHO.
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There are a few reasons for using the Hydra:
- AVCS programability
- Closed Loop based on the wideband instead of the narrowband
- Much simpler boost control (tuning boost control on the stock ECU is the most difficult task)
- MAP based tuning (the MAF sensor is used only for intake temp)
- *much* better tuning interface (even if it's kinda crappy, at least it's live tuning and better visually than the open source stuff)
Safety-wise, the Hydra has knock detection and alternative "safe" maps that it will switch to if there's a problem. Plus it's got "auto-tune" which is similar to the stock ecu's long-term learning (and it works for the open loop maps too IIRC) so it can react to bad gas an the like, as long as you leave the auto-tune feature turned on (I haven't been using it because you need a WB which I just got the week before the motor broke).
Since working with RomRaider is such a tedious process, I'm just going to go right back to the Hydra. All I need out of the stock ECU is getting past smog once a year... and I'm going to look into registering the car for use at the track which is outside Washoe County so hopefully today was the last time I'll need to smog that car.