I thought I would post an update on our tuning since there appears to be some confusion, as well as share some details about this engine control management with other forum members.
We've noticed some members wondering as to when tuning will become available. Tuning support for 1996-2006 V8 4.6L engines and five-speed transmissions has been available for a while. When we announced tuning availability for 2004-2006 LH2s, we mentioned that we observed some knock retard on our vehicle. This was not a byproduct of custom tuning - it was observed on the factory calibration. Since then, we've confirmed that a number of vehicles running this engine management system are experiencing the same issue. This means that even when running premium gas, many of you are not seeing the full power the engine should be delivering.
Now a little bit of information on knock retard. This is a function that normally prevents engine damage when engine knock is observed, or in some cases, "guesstimated." What the engine management system does in such cases, is it reduces the amount of final ignition timing, thus reducing delivered power.
I think the following article is a good read for any 2004-2006 LH2 owners:
The article mentions an "individual cylinder knock control" feature which is present in these ECMs. In the course of our tuning development, we've studied this technique in great detail and in our opinion, this system is perhaps too sophisticated for its own good. In fact, it is so complex and convoluted, a second processor in this ECM is almost entirely dedicated to it.
Furthermore, this particular ECM has a system in place for judging "ignition efficiency" (the quality of the actual ignition given the fuel used and ambient factors). It has the capability to reduce your engine torque by as much as 60% based on this calculated quality.
To combat some of these issues, one might consider our "knock retard desensitizing" option in a custom calibration, or, in a race-only vehicle, choose to disable the knock retard altogether.
Another observation we've found interesting is that this ECM may have also been intended for the supercharged line because certain parameters are defined to cover over 500 ft. lb. of torque. If some owners would like to do a forced induction conversion, we would be very interested in helping with such a project.
Other areas of interest for us have been developing a Vehicle Theft Deterrent (VTD) bypass solution for retrofit applications and we do believe we have a full solution now. If you have a retrofit application, please let us know.
We're currently developing and testing tuning for the suspension control module as well. We can work with owners who choose to remove the Magneride system from their cars to compensate for the reduced speed range.
Any other changes including tire size/gear ratio changes and all the usual things one looks for in a custom calibration are not an issue.
If you have any questions, please let us know and we will be happy to clarify them for you.
PS: I'd like to mention to moderators that we've attempted to purchase our usual "Authorized Tuner" subscription and it is unavailable. Your "Upgrade" button above points to a dead link. We've used the "contact us" form to notify the forum owners about these issues.