Trying to pass on a two-lane road, pulling into traffic. You want your power to be where you ride. Most people don’t ride there, and those that claim they do must have less traffic and more forgiving police than the rest of us. I did a blog post about it a couple years ago here.The short version is this: Peak horsepower on Harley big twins happens near 6000 RPM. People don’t pick a cam to match their heads, and/or and exhaust to match the cam and heads.Another common mistake is misunderstanding Horsepower and Torque. The components need to complement each other.Over all my years of tuning, this is the most common mistake I have seen. You just can’t grab any cam/head/exhaust and get the results you want. It really is a paint-by-number job.The actual “Black Magic” in making power is in matching the components (heads, cams, exhaust, etc.) to get the optimum airflow for the RPM range you want to ride. Of course, if you increase airflow, you need to increase fuel – or maybe adjust the timing which is where a tuner comes in.When we use a tuning tool like Super Tuner or Pro Street Tuner, we tell the ECM what the new airflow is from the new hard parts, and maybe the new injector size and/or engine size. And the only way to do that is by changing hard parts, cams, heads, exhaust, big bore or stoker kits. The only way an internal combustion engine makes more power is by flowing/ combusting more air.There is nothing in any tuner available for Harley’s Screamin Eagle or aftermarket that can increase airflow.The only way to make more power is to increase airflow in the RPM range you want to make power in. Instead, it allows you to make modifications to the engine that will make power. These are just a few of the companies that have received fines over the past several years.Power BasicsNo tuner really increases the power of a motorcycle. To view links or images in signatures your post count must be 10 or greater. If your not living on the edge, you're taking up too much room. Dynojet, Daytona Twin Tech, West Coast Choppers, Volkswagen. It is not the first time the Environmental Protection Agency (EPA) and/or the Air Resource Board (ARB) (formerly known as CARB) have handed out penalties and fines. Screamin Eagle Super Tuner Pro SoftwareĪnswers to your Pro Street Tuner QuestionsAnswering Your Questions about EPA, ARB, Super Tuner and Pro Street TunerWhat will we do without Super Tuner? And since Pro Street Tuner is EPA-compliant, will it actually make a power difference?We’ve been getting a lot of questions about this, so I thought I’d answer them for all of you here.The writing has been on the wall for years.
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