Road racing has some similar things with street riding, but usually the street rider is the most demanding when it comes to throttle quality and feel. But, having driveability that far surpasses stock is what separates a good tuner from a guy who follows the dyno tuners manual, or spends his work life on the dyno or at the dragstrip only.Ī tuner that tunes primarily for the dragstrip or spends most of his time on the dyno has little to do with street riding. The big HP is easy to get for any tuner that knows a little bit. I will not release any tuning program to anyone until it passes my personal picky standards. Throttle response needs to be smooth and predictable. and at all throttle positions, including max power at full throttle. The rest is your riding skill.Ī street rider or road racer on the other hand, needs everything to be as perfect as you can get it. If it runs just ok at part throttle, this is good enough. You just need the wide open throttle to be fine tuned and not much else. If your primary riding is just at the dragstrip, you don't need an engine that runs perfect at all throttle positions. Ivan himself on his website even says this.Īdding a free intake will result in the most HP, exhaust adds about 2 to 3 HP. The Flash was never about horsepower, that is a huge misconception in the internet world. After the flash you have to re-learn the bike because it is completely different in a great way. The Ivan' flash is the best mod you can get for a V Star or any of the fuel injected bikes he works on. Allows the radiator fan to come on at a lower temp to promote better cooling during stop and go. This causes hard deceleration, backfiring and popping when using less restrictive exhaust.ĥ. Disables "fuel cut" Fuel cut is an EPA mandate to have the fuel injectors turn of every time you let off the throttle above a certain RPM (Idle). Results in more power in the lower RPM range and runs the A/F at the correct range instead of the over lean factory condition.Ĥ. Enriches and leans the fuel tables/maps as needed. Adjusts the throttle mapping for a smoother roll on instead of the ON/OFF behavior of the throttleģ. This also allows the engine to run cooler and produces less heat and vibration.Ģ. This helps eliminate the surging and lack of torque at lower RPM's. Advances the ignition timing throughout the power band. A open air intake and exhaust is where you will see the increase in power. The Bren tune should fix that with the 2014 throttle mapping.Ivan's flash is not for power like most mistakenly assume, it is for smoothness and ride-ability. I think people would refer to the stock throttle as being sloppy because of all the extra free play. If Bren didn't do the throttle mapping people would be complaining that the feel of the throttle hasn't changed (and it probably won't on 2014 models but I'm not sure) but the bike is producing more power. However Bren is not just doing throttle mapping they've remapped the fuel injectors for more flow. I keep reading complaints that the newer stock K1600 models require to have the throttle twisted much more then earlier models to get similar performance from earlier stock K1600s. So the newer model bike's throttle response will be the same as the 2014 model, however with the Bren tune the fuel mapping is more aggressive. If I understand what Bren has done, they used the throttle mapping from the 2014 (how much you have to twist the throttle for a given amount of acceleration) and then they also changed the fuel flow of the fuel injectors to achieve the better performance. I'm now making do in those steep hill situations by just revving it up to about 6k, and letting the clutch out ve-ry slow-ly while still tweaking the throttle upward if necessary, but I just don't care for the feel of it, and anyone looking on who's ever ridden has to think I'm an idiot noob who doesn't know how to ride, and that's a bit annoying, too. Just last Friday with a Rally group in South Central KY, I had to turn right where cross traffic didn't stop, but just over on the backside of a blind hill, so that if I stalled or TSC kicked in while turning right, and someone came over that hill doing over 80, I'd be a wet spot in the road. In some of those situations, you just can't have it. I've stalled it a couple times thinking I'm in 1st when I'm really in 2d, since my cell phone covers up the gear indicator (no way I'm covering up the tach), but even with hill start, when having to turn after a dead stop at the top of a steep hill, there seems to be a fine line between a stall and spinning the rear and having the electronic nanny kick in. Everyone has to love options in a capitalist society.:tb
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