the guhls seems to be more indepth from what I have read. I still don't understand it all. is the ecu flash done in conjunction with a separate unit for fuel tuning?
I've sort of been wondering the same thing. My ecu is out as of this afternoon. I think I'm going to guhl's based on the fact that they are close to me and I've found more specific information about what their flash does. The other forum pretty much prefers flash tune and this forum seems to prefer guhl's. $175 is a big cost difference if you only have basic mods though.
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In conjunction with power commander or juice box pro or bazzazz...? No....the reflash renders all of that useless..well...according to some members that have had it...I guess they had to dyno a fz8 at some point for a starting point and then go off that...? I'm not 100% either..
If you read the entire guhl flash the flash was developed at guhls on his dyno with my bike. There is also an attached video of the bike on the dyno with dyno charts. So with that said he can change the fuel tables in the factory ecu to accommodate the mods on the bike.
What kind of gains did you see? Do you have any dyno charts to show numbers compared to guhls. All dynos read different so a before and after to truly show the gains
Not necessarily. To be fair one would need to look into the specific changes each make to the ignition and fueling maps, and dyno test each one for comparison. After having put several hundred pretty aggressive miles on mine with the Guhls, I can say that for them to have done so much with the reflash means Guhls had to have done a close analysis of the engine mechanics. That is, I feel they actually looked at the cam timing, lift and duration, throttle body size, engine compression ratio, and other aspects of the engine design in order to calculate just how much performance they could get away with, and where. The ignition timing has clearly been advanced to a significant degree but in a very calculated way, blended with the fueling and electronic (secondary) butterfly opening. I didn't ask but I think the bike do better with premium fuel after the reflash. I always use it anyway. I can roll the throttle wide open and absolutely no detonation with 91 octane and hard acceleration.Are they doing the EXACT same thing? Need ecu mod very soon..torn between which to go with..please help sway me in a direction lol
Not necessarily. To be fair one would need to look into the specific changes each make to the ignition and fueling maps, and dyno test each one for comparison. After having put several hundred pretty aggressive miles on mine with the Guhls, I can say that for them to have done so much with the reflash means Guhls had to have done a close analysis of the engine mechanics. That is, I feel they actually looked at the cam timing, lift and duration, throttle body size, engine compression ratio, and other aspects of the engine design in order to calculate just how much performance they could get away with, and where. The ignition timing has clearly been advanced to a significant degree but in a very calculated way, blended with the fueling and electronic (secondary) butterfly opening. I didn't ask but I think the bike do better with premium fuel after the reflash. I always use it anyway. I can roll the throttle wide open and absolutely no detonation with 91 octane and hard acceleration.
Only way to know how to make it work that well is through the science of high-performance tuning. Guhls has been doing that kind of tuning for true race vehicles for years so they know exactly how to do it.
Every time I ride my bike I am still stunned at not only how much better and more fun it is to ride, but how much faster it is everywhere.
It is truly a different motorcycle after the Guhls ECU reflash.
I don't say that another company might be able to do the same thing, but I can definitely vouch that I think Guhls got every bit of added performance and driveability out of my FZ8 that was possible given the only mod was a K&N air filter. That takes knowledge and experience.
Yamaha will absolutely not reflash your ECU. They can't, it's not an "approved" procedure.so im guessing my best option is to get a power commander or something. I basicly want to cut down my flies and adjust fueling so I don't run lean. I have airbox mod ais and exhaust mod. it seems atm when I take off the flies are restricting the airflow until about 2.5 to 3k rpm. after that it pulls smooth and before that is hesitates.
I thought people were saying you could take your ecu to a Yamaha dealer and get it flashed. I ride every day here in aus and couldn't have my ecu gone for even a week.
so im guessing my best option is to get a power commander or something. I basicly want to cut down my flies and adjust fueling so I don't run lean. I have airbox mod ais and exhaust mod. it seems atm when I take off the flies are restricting the airflow until about 2.5 to 3k rpm. after that it pulls smooth and before that is hesitates.
I thought people were saying you could take your ecu to a Yamaha dealer and get it flashed. I ride every day here in aus and couldn't have my ecu gone for even a week.
Yes, you can map fueling with a Power Commander but you can't change the ignition timing, remove any factory restrictions, or change engine braking or the way the secondaries behave.
All that can be done in the ECU.