With Tephra's V.5 map I believe it is now possible to trigger your meth kit to come on at a preset load %.

The way you could implement this would be to set up your system trigger to respond to the output channel normally going to the ICS activation wire (assuming you don't useor have an IC Sparyer)

Personally I use my HFS-5 with IDC trigger and I have not had any problems with accuracy and consistency of the triggering point but in theory I think this would be even easier and more predictable when it comes to tuning. The kit would always turn on at exactly the same engine load.

What do you guys think, I think this just might be the best system trigger possible????

 

Your mentioning using the ICS wire, does that mean you will not use it for map switching because with meth that is the greatest advantage of the new V.5 patch.

 

I would plan to use the spare ADC channel as the way to trigger the map switching and use the ICS trigger signal to turn on the meth kit.

 

Turbo boost pressure is a good measure for engine, that is how our VC-25 has been working for years. Set to activate at 1/3 your max boost.

 

Turbo boost has been used as a trigger for years, and we all know it works. But I think that load % is a better trigger. I think turbo boost can be difficult to tune since you can reach different boost pressure while still being at the same load value...making it harder to tune.

 

Agree, that is why we developed the VC-25D controller for the Mitsubishi. And also the new VCS3g that uses both Boost and IDC to deliver very flat A/F with meth injection without tuning.

 

I can appreciate the sophistication of your products but I would like to discus the merits of using load % as a triggering signal vs. boost vs. IDC %.

The linearity of injection achieved by a meth kit is a topic of discussion onto itself.

 

what loads would you shoot for? and how would you trigger it? I don't see it...

 

Ideally, if the system can be triggered just before the boost ramp so extra timing can be dialled in without fear of knock. Think of meth injection as a meth full tank of racing fuel but only used from certain enigne % load upwards.

Triggering point is laragely dependent of the dynamic range of a WAI system. Here is a quick summing up of type injection systems and their dynamic range.

1. Single point: no dynamic range - octane and cooling enhancement decreases as soon as engine load increase.

2. PPS (Progressive pump speed) system: effective dynamic range is about +70%. For example, it will be good for covering a power range between 100HP to 170HP. Beyond 170Hp, the octane enhancement effect starts to decrease.

3. IDC system with true PWM valve: Octane enhancement range can be as early as from "idle" to as late as the "entire" power range. This is becuase the WAI system acts more like a secondary fueling system, packed with high-octane fuel.

Just to sum up to your question. The ideal "trigger point" will depending on what type of system. Wider dynamic range provides "earlier" commencement of triggering point.

I think the triggering point is more accurate based on engine load rather than boost. Boost is only a single entity of engine load, absence of RPM reference. Injector duty cycle % is a more accurate representation of true engine load.

 

good info...thanks richard and everyone else.

 

how about backing your claim with some datalog of AFR vs. boost/idc/rpm/load @WOT 1st thru 4th?

 

Can we please try to leave that out of this thread. If possible I would like to keep this discussion independent from any one manufacturer.

I understand that the triggering point may not be as important as linear injection, but what do you think of using load % as an injection trigger rather than IDC %, boost, etc...

Thanks

 

For a load trigger I might go with something around 150%, I haven't thought about it too much to be honest. Also, Tephra's patch allows you to enable the ICS at a certain load %, I would just use this signal to turn on the meth kit.