Hi everybody. I have been reading diff threads/posts on this forum for awhile but have never posted. I have been enjoying but not participating, this has changed since I think I have the components I need to start my project. I just need some educated advice and helpful comments that may be particular to my car, hence the post here.
I have a 04 Dodge SRT-4, the major things done to the car that are for engine performance are: Stage II with toys, a piggy back controller (SMT-6 based), upgraded exhaust and a Zeitronix wideband for double checking A/F ratios and EGT temp (EGT probe not hooked up yet).
With regards to the factory stage II upgrade with the toys option:
The toys option has a HOM switch (HOM =High Octane Mode) for running race gas. My best understanding of what this switch does, is allow increased timing when using race gas (higher knock threshold). However if the PCM sees knock that it thinks should not be there when HOM has been switched on, it overrides the switch and reverts back to non HOM mode (thinks that you do not have race gas in the tank and switches to back to base map), this is for the safety of the engine.
From what I?ve reading (correctly or incorrectly), WI if installed, setup correctly, and properly tuned may allow the use of the HOM switch without using race gas. Besides some of the other benefits of WI this is my main goal of using WI on this car.....if it can be done.
I have had the piggy back controller for awhile now and have always intended to use the piggy back and WI together. Right now the Piggy back is setup/tuned to make more power, keeping the A/F around 11.0 - 11.5 (no higher till EGT probe hooked up). Without the piggy back the factory tune was dumping fuel (around 9.00 -10.5 under full boost). Also, at this time the piggyback I?m using can not be used to advance timing only retard (see web link).
I recently purchased an Aquamist 2C system as the basis of my WI system. I was intending to install the Aquamist jet and HSV post intercooler but before throttle body in order to reach or meet my goal of using the HOM switch without buying race gas. However, If the car has a piggyback controller that can control a HSV (see web link), should I be looking more closely at injecting into the intake manifold (port injection)? What setup or placement of injector(s) do you think will help most in simulating race gas? If it applies, what WI mixture do you think will be needed for this? With regards to fluids, keep in mind the idea is a low cost replacement to race gas, I would like to keep things simple once setup, and not have to spend time on a weekly or monthly basis sourcing anything exotic or expensive (distilled water=less than $.99 per gallon).
Here?s a link to the piggyback I?m using from PSI-FI motor sports
http://www.psifimotorsports.com/ECU.htm
Here?s a link to a description of the stage II with toys from Mopar
http://www.mopar.com/srt_stage_2.htm
Here?s a link to the Zeitronix wideband
http://www.zeitronix.com/Products/zt2/zt2.htm
Hers a link to my Exhaust upgrade from MaxFab and Mopar
http://www.maxxfab.com/welcome1.html1.html
If anybody has some comments or needs additional info or just wants to talk about what I?m proposing to do with WI on this car, please feel free to post.
Thanks
Jack