Yep the O2 sensor actually is being looked at from 500 to 4000 rpm, right where we ride.SO the A/F ratio is more in line with power and not EPA. The ECU mod does not add fuell like a tuner, but adjusts the fuel tables for better ride ability and disables the ECU looking at the O2 so it can lean the mixture. The ECU mod does not add power, but gives the bike a tune so that more power is delivered sooner in the lower RPM range. You can actually short shift like a big V Twin with no chugging. Since the timing is no longer retarded, 89 octane or higher must be used. This means the timing is advanced from stock, when means the bike runs much better and has way more power at lower RPMS. The stock programming runs the timing retarded to keep the exhaust hotter to keep the catalytic converter hot for emissions, the down side is the bike runs hotter and is more sluggish, great for EPA, sucks for riding. The re-curve of the ignition timing is set for performance and efficiency. Also when you let off the throttle, since fuel cut has been disabled, the bike doesn't surge in deceleration, so up and down shifting is very smooth. The throttle has a much smoother feel like a carb bike. No more On/off responses, jerking from idle to on throttle. The fuel mapping has been changed to the throttle response is smooth and more predictable. The factory setup in the ECU is not optimal at all for rideability, it is setup for emission which make the bike have the fuel injected quirks we all hate. I have this mod ad will give the details. On a side note, he actually offered to give me further explanation of his service to specific questions i had, which i sent him, and then never heard from him again.īonus points if anyone can explain the following from his site for the 950 model:Ī) Gets rid of part throttle timing retarder for more response and less vibration when cruising and moderate acceleration.ī) Gets rid of high rpm timing retarder allowing the engine to make maximum power for longer.Ĭ) Set timing for maximium power and driveability across the entire rpm range & all throttle positions"Īre all these just the effects from the single action of raising the rev limit of each gear? i could go on and on about the new questions that are raised with the new info he's put up, but that road hasn't gone anywhere. and since he fine tunes each person's ECU to their specific setup (air/exhaust mods), i was hoping Cipher could answer what was specifically, or even vaguely, done to his instead of just the usual after effects dialogue of 'it runs better'. i'm curious what specific things are referred to as "problems". he also claims he fixes "fueling problems" on the various models. specifically, "Raise rev-limit in all gears to 6600 rpm." for this 1300 model. and it seems that only recently has he put up information that gives more details into what he does with the ECU than had been on his site for a long time. I will be running the bike more over the week and will provide an update to the review after. (very nice feature of getting the power commander from Ivan' All the maps are already loaded for My setups and future additions. The power commander already has the Maps loaded for an open air intake so i just have to switch over to it once I get one. Hopefully soon I will pick up a Air intake (most likely a cobra Powerflo. I couldn't be happier with the overall performance and responsiveness of the star now. There is no longer any popping during decel. I no longer need to drop a gear to pass with "care". At higher speeds one simply needs to just crack the throttle a bit and the power is there. The acceleration is very smooth through the entire power band. There is no more "lugging" when twisting the throttle during low speeds. The throttle response is crisp and very responsive. I have to say "wow" it's like having a different bike. the ride home was approximately 256 Miles. I had a nice long conversation with Ivan and we went over the things that where done to the Bike. I am happy to say I went down and picked up the bike today. Just a little review on Ivan's ECU flash for the V-star 1300.
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