Hotrodding the GS

[J_White]

Still eager to hear about what goes on with the stock system at idle,
cold start and at temp...

[mdmaroon]

I am definitely buying one of these contraptions.

I hate the surging, and I hate the "on-off" throttle response when trying to ride slow. I was considering selling my GS and buying something like a VFR 800 to rid myself of these annoyances.

If I can eliminate these problems, I'd certainly rather keep my GS. (Although I'm tempted to buy a VFR anyway... My brother had one and those are one sweet bike. Gear driven cams in a V4...OMG...sounds heavenly, and the power delivery is so smooth and predictible. It's like a turbine engine).

[Mike Figielski]

Can you eloborate on how your solutions (devices) will differ from those already available like the Power Commanders and Dobeck Performance (Techlusion) controllers? Very interested in differences and similarities. Thanks,
Mike

[johnjen]

Originally Posted by Mike Figielski

Can you eloborate on how your solutions (devices) will differ from those already available like the Power Commanders and Dobeck Performance (Techlusion) controllers? Very interested in differences and similarities. Thanks,
Mike

We are writing a series of explanations describing the key areas in the algorithm that are 'deficient' and what our solution will entail.

The key difference is we are approaching this from a through understanding of the design of EFI hardware and software that is used. Not merely how to spoof them.

Well really it's Poolside who has all the smarts on this one.
I'm just the wide eyed eager lab assistant. You know the one who holds the 2 wires and gets the afro hair do after the ZZZAAAAAPPPPPPPPing stops…
Followed closely thereafter by the off-hand, eureka!. It's a success! Now lets work on a different hair style…

JJ

[johnjen]

Originally Posted by J_White

Still eager to hear about what goes on with the stock system at idle,
cold start and at temp...

Yes we are planning to provide solutions to 'improve' those 2 states of running the engine. But they will probably happen at a later date.

JJ

[Poolside]

Some parts arrived on Friday, so I can put together a production example. This assembly will be representative of the first product we're going to be selling. I'll be figuring out what the assembly process will be, and see what sort of fixtures will be needed. I'll be sure to get some pictures up when it gets to the 'hello world' stage

[Sandman]

Sign me up for one!

[mike54]

Originally Posted by Poolside

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.

[J_White]

Originally Posted by johnjen

Yes we are planning to provide solutions to 'improve' those 2 states of running the engine. But they will probably happen at a later date.

JJ

I appreciate the answer, but what I was really hoping for was for ya'll
to fill in the blank blocks on the chart that was posted. Just
one of those "wanna know what makes it tick" things

[johnjen]

Originally Posted by J_White

I appreciate the answer, but what I was really hoping for was for ya'll
to fill in the blank blocks on the chart that was posted. Just
one of those "wanna know what makes it tick" things

The blank blocks will remain blank (well except for two of them) but a more in depth explanation is in the works even as I write this. But 1st up will be a definition of specific fuel injection terms just to help make things clear(er).

JJ

[Poolside]

Here is a table summarizing the operation of Electronic Fuel Injection. After the chart is a Glossary of Terms. I'm hoping to make the subject of fuel injection a little more understandable, or at least approachable. You may not believe it, but the fundamental operation of EFI, if not the electronics and software themselves, is fairly easy to grasp. A lot of people who ride are interested in knowing what the ECU is doing, good and bad, to affect the pleasure of riding. If you're one of those people, I hope you find this useful. Begin at the top left, and work your way down the blue column. The blue column lists a common sequence of rider inputs. For example, traveling at a constant speed, rolling on the gas, speed increase, rolling off the gas, speed decrease, etc. The green boxes along the top are the ECU subroutines, or algorithms if you like. The subroutines are triggered to 'execute' based on what the rider is doing with the throttle. The subroutines are a set of instructions and procedures designed to carry out a particular task. The IICE Air operates in the Blue range - Really ramps up open loop acceleration. The IICE Cool operates in the Violet ranges - Puts the punch back into the throttle response. The IICE Smooth operates in the Pink range - This one is the fix for Surging! But it also goes a long way to improving throttle response. Following the chart is a definition of terms.

Steady State Just like it sounds. Throttle is steady and the motor is turning at a constant RPM. Steady State includes a constant throttle and speed on uphill or downhill grade. Tip-in Refers to an opening throttle movement. An increase in throttle angle. Tip-in isn't the amount of throttle movement, it's the movement itself. Specifically refers to the duration of time when the throttle angle is actually increasing. Tip-out Refers to a closing throttle movement. A reduction in throttle angle. Tip-out isn't the amount of throttle movement, it's the movement itself. Specifically refers to the duration of time when the throttle angle is actually decreasing. Overrun Fuel Cutoff (or OFC) Starting from any steady state throttle position, if the throttle is tipped out 15% or more the ECU cuts off all the fuel flow. If the rider closes the throttle completely and allows the bike to slow, fuel cutoff continues. Fuel delivery resumes below 1700 RPM, and is felt as a distinct lurch. Leading Throttle Say you're traveling at 35 mph and you tip-in the throttle to 75% and hold it there. The bike is increasing speed but hasn't yet reached its final velocity for the new throttle setting. You can think about that condition in terms of the motor trying to 'catch up' to the throttle. The throttle is ahead of the motor, and is leading it to a new RPM. Trailing Throttle Opposite polarity to Leading Throttle. You've backed out of the throttle some and bike is slowing but hasn't yet reached its final velocity for the new reduced throttle setting. The throttle is trailing the motor. Closed Loop Closed control loop operation is probably the most complex routine in EFI systems. But to explain it simply, Closed Loop is when the ECU is using O2 Sensor feedback to adjust its fuel calculations. When the ECU is running in Closed Loop, some sensor outputs are ignored and are left out of the fuel delivery calculation. Open Loop During Open Loop operation the ECU does not use O2 Sensor feedback to adjust its fuel calculations. And just as with Closed Loop, when the ECU is running in Open Loop, some sensor outputs are ignored and are left out of the fuel delivery calculation. Transient Enrichment (aka: Accelerator Pump) Without Transient Enrichment, the motor would stall when you open the throttle. With the right amount of enrichment, the throttle response is crisp. Puts a smile on your face. With emissions-based enrichment, it feels like a GS. Transient Enleanment The opposite of Transient Enrichment. How's that for sidestepping the answer? Seriously though, the two terms are actually the same term, but different signs. You know, one is positive and the other negative. Generally the two are collectively referred to as Transient Fuel.

[jadoca]

"With the right amount of enrichment, the throttle response is crisp. Puts a smile on your face. "

[gelandestrasse]

50 state legal?

[Poolside]

Oh yea, of course.

[jbdesigns]

I just read this thread and I am all tingly thinking about when this product is released so I can get my hands on one. I just love my 1150gsa even though there is a little wierdness with the fueling. not enough bad habbits to make me want to get rid of it, but not as smooth as I think it could be. if this device does even half of what it is being predicted, I will be happy.

I changed the pipe to a Akra and got rid of the cat to make it sound better (to me). wasn't looking really to gain any performance but i would certainly like the EFI settings to be more in tune with the newer, freer flowing exhaust.

I will be checking back every day to see progress. cheers to you both for working on something that should benefit us all.
John