Eruption AIT Spoofer Mod

[drzcharlie]

When I first read about the Eruption I decided to go ahead and do the mod. Well, today I got my thermistors so I did the mod. The thermistors are a LOT smaller than I thought.

I pulled the AIT out. That part wasn't hard but the spring clip flew off when I pried on it and it took me a while to find it again. It was on top of the engine head kinda hidden.

The next step was to cut the "cage" off of the the AIT to expose the existing thermistor.

So now I have this.

This is the plug that will go back into the air box. I have removed the cage and post that housed the old thermistor and stripped back the wires and tinned them.

The thermistor bundle (8) twisted together tinned and soldered to the leads on the plug and then I set the heat shrink tubes.

In order to make the sensor stiff enough to withstand the vibrations of the bike you need to put consecutive layers of heat shrink tube on to stiffen it up.

Finished AIT spoofer

I didn't get the picture before I pulled out the stock AIT but it was 54.5 degrees in my garage according to the gauge on my dash. This mod is supposed to fool the ECU into believing that it is 20* colder so that it richens the mixture and delivers smooth idle, no hiccups or complete stalls.

As you can see the temperature was exactly 20* colder on the gauge after the modification.

So, the mod was a success. Previously when I started the bike the ECU would hunt around trying to normalize the engine into running at a steady idle. It also took about 10 minutes for the bike to warm enough to get that steady idle but I still would get stalls and hiccups. I took the bike out right before the rain got heavy here. The bike warmed almost immediately and ran smooth as silk. I guess time will tell if the mod continues to work correctly.

 

[bikehunter]

Nice job,I have not had any issues with the Eruption set up, even with the GPR exhaust and Foam filter added. In fact it runs better than ever
Shame about the tempartue on the dash, but I can live with that as I can tell when its freezing out due to feeling bluddy cold LOL

 

[drzcharlie]

Nice job,I have not had any issues with the Eruption set up, even with the GPR exhaust and Foam filter added. In fact it runs better than ever
Shame about the tempartue on the dash, but I can live with that as I can tell when its freezing out due to feeling bluddy cold LOL

So, "no problems" meaning no stumbling at all? Some riders state the ECU learns and eventually negates the benefits of this arrangement. I don't buy that as we are just richening the idle circuit during warm up.

 

[run-it]

It's gratifying to help - much of the credit for The Eruption goes to a couple of Italian riders. The Eruption behaves like Booster Plug & The Juice except those are expected to deviate from their 20C target enrichment in extreme riding temperatures (they go rich when hot & lean when cold).

All these spoofers are in effect when using OTHER THAN steady state throttle position on the TR. Therefore cruising on the freeway should not change fuel economy to speak of.

All these spoofers will make the TR run richer during initial start until warmed up, it seems the mfr got the cold engine map pretty well already. For any of these spoofers, if you ride in extreme cold you may have to tape / block off your radiator to help keep operating temps where they would normally be on a standard day.

As for the ECU learning, I don't know, it's possible there are situations where the transition from open & closed loop are narrowed, but I haven't noticed any permanent bridge or narrowing between them, The Eruption is definitely still affecting the OL map.

 

[nev..]

For any of these spoofers, if you ride in extreme cold you may have to tape / block off your radiator to help keep operating temps where they would normally be on a standard day.

Are you sure? Surely the mechanical thermostat is going to regulate the coolant flow through the radiator independent of any electronics.

 

[run-it]

...Surely the mechanical thermostat is going to regulate the coolant flow through the radiator independent of any electronics.

Yep, not saying otherwise - what I'm trying to convey is there may be a low enough ambient where the stat is beginning to allow flow & the (increased) temp drop through the radiator prevents reaching normal operating temps. I don't have the joy of experiencing those sort of riding conditions though so no firsthand experience, just a supposition, but if the bike can't get warm it'll run rich.

 

[bikehunter]

So, "no problems" meaning no stumbling at all? Some riders state the ECU learns and eventually negates the benefits of this arrangement. I don't buy that as we are just richening the idle circuit during warm up.

WTF? does that mean, is the ECU developing thought paterns

 

[bikehunter]

First thing is that the mixture increase is only 6% tops, secondly with the new full flow exaust and filter will bring down the mixture. But I suppose you would rather run the bike lean as standard and enjoy the stalling, hunting at tickover, and having to keep the revs up in lower gears just to stop it vibrating!
personally the bikes never been better and I will take the chance that the bikes going to realize that its being cheated and change the perameters !

 

[drzcharlie]

It's not bitter here but it's cold for Arkansas . Current temp is 31* F (-0.5* C). I just took the bike out for a short but spirited ride (I'm still shivering). I ran through the gears on a bit of mild single track, some gravel roads and the pavement from my place to the gravel.

I of course had the snow flake flashing the whole time. When I turned the bike on my dash (this is the second time out since the Eruption mod) temp gauge showed 11* F (-11.6 C) The engine/ECU hunted for smooth idle for about 5 seconds tops. Compare this to about 5-8 minutes prior to Eruption. It found a good steady idle quickly and seems to want to idle slightly faster than before. My bike developed the stumble out of the box. When I would stop in traffic I would have to fiddle with the throttle to keep the bike from dying while sitting still. That is not the case anymore. It idles smoothly, and without hiccups. When I accelerate now the flat spot I had at about 3k rpm seems to be gone. Transitions between shift points also seem smoother though I doubt that's the case because I am starting to learn my Red Headed Mistresses sweet spots now.

So, initially my evaluation is that the Eruption spoofer has cured some aggravating problems for me. Continued use of the bike with the mod installed with be the telling factor. My initial reaction with the Eruption Mod is that I am very pleased with the result thus far.

 

[bikehunter]

Well done Charlie, I'm sure you will enjoy the riding with the Eruption during the summer and I'm surprised to read on this subject that the radiator thermostat is linked to the ECU or maybe I read it wrong.

 

[run-it]

Well done Charlie, I'm sure you will enjoy the riding with the Eruption during the summer and I'm surprised to read on this subject that the radiator thermostat is linked to the ECU or maybe I read it wrong.

Sorry for the confusion, not saying the ecu & radiator t-stat are linked directly. Rather, the ecu may have a cold engine fuel map, which would be richer than its normal operating temperature fuel map. With any spoofer if the engine can't come up to operating temp it will likely run rich.

 

[bikehunter]

Sorry for the confusion, not saying the ecu & radiator t-stat are linked directly. Rather, the ecu may have a cold engine fuel map, which would be richer than its normal operating temperature fuel map. With any spoofer if the engine can't come up to operating temp it will likely run rich.

No problem, just getting my head around it. I suppose the temparture may change a bit but even the other way round with a weak mixture (standard) you have the fan coming on more! I still get the same MPG before and after, but she is just a better all round machine now and I think that the bike will eventually get to operating temparture as thats what the cooling does, it gets hot and the fan cuts to bring the temparture down.
All my machines are enrichened for the factory settings are set weak for the emission test so they can sell the product, but they never run good!
I think that the correct running temparture with the richer mixture is right as the weaker mixture is not good for the engine, you can tell that just by riding it!