Guhl Motors ECU Reflash Donor Bike

[cablebandit]

http://lmgtfy.com/?q=ghul+motors

[Armyguns]

http://lmgtfy.com/?q=ghul+motors

Try this:  http://www.guhlmotors.com/

[Armyguns]

I was playing around yesterday looking at the 4th gear dyno chart and decided to look at the data in a slightly different way, one that might better show the performance gain.  I took the before and after torque and HP numbers at each of the major RPM points and calculated the percent increase in them at those points.  I then plotted the results.  So what we see in the attached plot is the percent gain in HP and torque across the RPM range from stock.  I have no doubt that the results are similar for each of the lower gears.

[DocPigskin]

Try this:  http://www.guhlmotors.com/

Thanks

[Kazairl]

http://lmgtfy.com/?q=ghul+motors

 Fail

[maxtog]

I am resurrecting this thread due to the other thread gaining popularity.  There never seemed to be any "conclusion" with this thread.  There was mention of more analysis was going to be done across all the gears- what happened?  There was mention of Guhl developing a flashing system- what happened?  It has been over a year now, Armyguns, are you still happy?  There was never any mention of anyone else flashing except Lt1?   I could find no other threads but this recent one:  http://www.zggtr.org/index.php?topic=12544.0

I was playing around yesterday looking at the 4th gear dyno chart and decided to look at the data in a slightly different way, one that might better show the performance gain. [...]

The "peak hp" and "peak torque" numbers from the flash are pretty much a waste of time.  But the 15% torque increase below 5000RPM should be noticeable.  But even that is not "dramatic".  As was mentioned before, it must be "response" that is most changed, which can't be seen on a typical dyno run chart.

I suspect it is almost all due to the flies, however and would have sparked a whole flies vs. flash thing that never really happened.

[VirginiaJim]

Thanks, Max.

[Armyguns]

<snip> It has been over a year now, Armyguns, are you still happy? 

Maxtog-  It has been over 13,000 miles and 1 1/2 years since my reflash.  I have absolutely no regrets.  Best 'bang for the buck'' I spent on ANY of the farkles I have purchased.  As the 5th gear dyno runs show, it isn't about peak HP or torque.  This mod is about making the numbers quicker.  As we all know, this bike in factory stock trim is no slug.  With the reflash there is a VERY noticeable increase in how quickly the bike accelerates and how hard it pulls.  I do a fair amount of 2 up riding and the performance hit the bike takes with the increased weight of a passenger is completely off-set by the reflash.  Acceleration is still strong and the need to downshift to stay in the 'power band' is greatly reduced.  Want to pass- just crack the throttle and GO.  No fuss, just GO.  I can't recommend this mod enough. 

[Conrad]

You guys with first gen bikes, when you spoke with Don, what options did you ask for in your reflash?

[maxtog]

You guys with first gen bikes, when you spoke with Don, what options did you ask for in your reflash?

Exactly, that was another on my list of unresolved questions.

And another was- what is the flies mapping while in ECO?  Does that stay the same or is modified?  Is the ECO map left unchanged for timing and AFR?

[VirginiaJim]

Exactly, that was another on my list of unresolved questions.

Why? You don't have a first gen bike.  Looking out for us Classic, FC (Fastest Color), and EA (Early Adopter) owners, Max?  Not that we need the speed increase.  We should probably be slowing our bikes down so we don't get hurt or speed off into another dimension we're so fast.  Thanks for looking out for us, though. 

[Armyguns]

Exactly, that was another on my list of unresolved questions.

And another was- what is the flies mapping while in ECO?  Does that stay the same or is modified?  Is the ECO map left unchanged for timing and AFR?

I don't have a first gen, so I can't answer that part. 

The ECO mode is completely UNCHANGED.  The map for that is in a different section of the ECU and Don (to the best of my knowledge) has not explored around in there. 

[maxtog]

Why? You don't have a first gen bike.  Looking out for us Classic, FC (Fastest Color), and EA (Early Adopter) owners, Max?

Yes.  I tend to think a lot about others

[maxtog]

The ECO mode is completely UNCHANGED.  The map for that is in a different section of the ECU and Don (to the best of my knowledge) has not explored around in there.

Thanks for the info.  The map can be unchanged but what about the secondary butterflies?  Is that at stock behavior while in ECO mode?

[Armyguns]

Thanks for the info.  The map can be unchanged but what about the secondary butterflies?  Is that at stock behavior while in ECO mode?

Flies are untouched on the ECO map with the Guhl reflash.  The ECO mode is factory stock across the board. 

[maxtog]

Flies are untouched on the ECO map with the Guhl reflash.  The ECO mode is factory stock across the board.

That is good news- it means one could almost have a "before and after" type experience... well, except that the ECO mode automatically cancels itself under heavy throttle/RPM

[Armyguns]

That is good news- it means one could almost have a "before and after" type experience... well, except that the ECO mode automatically cancels itself under heavy throttle/RPM

You absolutely can do a 'before/after' test except under max throttle.  Very instructive to play with the bike responsiveness under normal riding conditions, especially when two-up by switching between the two modes.  Honestly, I haven't switched back to ECO within the last year or more.  Once you have the power, you don't want to go back. 

[Conrad]

Why? You don't have a first gen bike.  Looking out for us Classic, FC (Fastest Color), and EA (Early Adopter) owners, Max?  Not that we need the speed increase.  We should probably be slowing our bikes down so we don't get hurt or speed off into another dimension we're so fast.  Thanks for looking out for us, though. 

 

Thanks Max!

[Cuda]

Group HUG for Max and Pussy
Max I believe he can install ECO as your standard mode then push the button for grunt mode, Incase you have that large KILLER Kitty  with you and you need more grunt
Since it is WINTER and I'm sure his work has slowed down , call for a group buy ? good time to send in your ECU for those of you who don't live in S Fl.
I'm going to bike week in Daytona ...anyone else ,  we should meet somewhere , Hooters?

[VirginiaJim]

If someone wants to work with Guhl on a group buy then by all means...  I'll sticky it for the duration of the buy to keep it visible.  We'll need to start a new thread for that.