Quote:
|
Originally Posted by Roverdose
are you going to run into det (knocking) when turning the boost up on the std ecu mapping?
what boost are you running now? what will you be turning it up to? and when are you planning to inject the water?
if the ecu is expecting race gas, it will be from tickover to top revs. if you inject water too late the hom may have been turned off already.
Drew
|
Several SRT-4 are already upping the boost without water and without the HOM. Without stage II or with stage II the boost can be raised (factory stock settings bypased by the owner), however the PCM will still retard timing when knock present.
I'm using the factory supplied adjustment instructions for Stage II on the factory supplied stage II wastegate actuator. This yields for me about 16.5 -19.0 (conditions apply). Right now I dont plan on upping the boost since at this point I'm trying to concentrate on HOM without race gas. As far as when I plan on injecting water, the actual WI tune will be handled by same people who market the piggyback I'm using. They have a fair amount of experiance of using the piggy back to control the HSV plus they have a very good working knowledge of the SRT-4. So I dont know at this point yet.
Because whether the HOM working or not is dependent on what the knock sensor sees and then feeds to the PCM, I think the key will be to find out when the car is near MBT since if I've read correctly this is where knock will be most prevalent. While road tuning and watching info via a ODBDII scanner I might be able to start a basic tune fairly close and then tune thu expermenting and datalogging till I can get the HOM light to stay lit. if it blinks I know the tune is off.
[/quote]