View Single Post
Old 12-07-2010, 04:24 PM   #163
Poolside OP
Poolside's Avatar
Joined: Apr 2003
Location: Long Beach, CA
Oddometer: 11,887

Originally Posted by mike54 View Post
You're going to be build these in your garage? That's the was Apple and HP started. Now we've got the iPone and Carly Fiorina. There's a bar to get over.

I'm hopeful here. All ears and waiting to see what is born/borne of this.

I know nothing about controls like the Motronic. But I'd be interested in hearing about how you're altering it's behaviour with out spoofing the inputs from the sensors. If you could put in in laymans terms.
Yea, built in my garage. You're right, there are some tough acts to follow.

To your question. Like I was saying in an earlier post, the 1st of these 4 upcoming devices does alter the air temperature sensor signal. In layman's terms, it is a spoof of the temperature signal.

But, two things are different about it. First, it's adjustable. Adjustability gives the rider a performance choice, and gives the device a wider operating range. Second, without that adjustability it will not work well with the 2nd, 3rd, and 4th, (so far) upcoming products.

The 1st device, the IICE Air, works on the air temperature. The air temperature controls the 'Open Loop' operating range of the ECU.
On the chart it's the BLUE box. (Link to Chart)
During open loop operation the altered temperature signal informs the ECU that the air is a little denser than it actually is, so it adjusts the mixture to match. The end result is the mixture is slightly rich relative to the actual air density.

The 2nd device, the IICE Cool, works on the oil/coolant temperature. The oil/coolant temperature controls the 'Transient Enrichment' feature, and also Overrun Fuel Cutoff.
On the chart it's the two VIOLET boxes. (Link to Chart)
Transient Enrichment is where throttle response comes into play. The hesitation while opening the throttle is gone. When someone says "I like how the motor feels" they are talking about off/on transition throttle response.

Besides off/on throttle transitions, the other big area where transient fuel makes all the difference is when pulling away from a stop. You know how it is, you let out the clutch and it almost feels like the motor is going to stall. It goes soft. You must open the throttle more, and fan the clutch to get rolling. Ridiculous.

With the right amount of transient enrichment the motor just torques away from a stop. It gives the feeling of having more power than it needs. Beautiful.

The Motronic does have some very nice operating states, trouble is they're never there when you need them. Well, we're fixing that.


IICE Air Hotrod your GS  Fuel Injection  Tech Info  Buy  Order List  Installation

Poolside screwed with this post 03-17-2011 at 06:26 PM
Poolside is offline