Once you have downloaded and installed the reader, simply click on one of the Manufacturer Logos to download the Dyno Sheet that matches your vehicle. 58mm and fits stock, 58mm or 62mm HPi throttle body. Designed to replace the stock throttle body and will bolt to a stock throttle with a slight step. In order to view our Dyno Sheets, you will need to have Adobe Acrobat Reader. Description Additional Information Horsepower Inc. Use these sheets as an idea of the performance you might expect but keep in mind your vehicle results may be different. Mary Jo was a smart enough business women to realize that the work her employees were doing could be turned into a new revenue stream, and so she set about creating Horsepower Inc., which at that time was the first company to manufacture an aftermarket throttle body and intake replacement for Harley- Davidson engines. Note that the number reflected in these dynamometer charts are at the drive wheels and not at the crankshaft as rated by the manufacturer, normal loss between crankshaft horsepower ratings and the horsepower at the drive wheels is a loss of 5-20% or more. In addition to the dynamometer testing each vehicle is tested under real world driving conditions to insure the vehicle has good drivability. performance Harley-Davidson throttle body and injector review 1,179 views 9 Dislike Share Save V-Twin Visionary 1.85K subscribers Jeff G. Once we have established the stock horsepower numbers we test, tune and test again until the maximum horsepower gains are achieved in all of the RPM ranges. from 250hp to 260hp the fuel pressure should be bumped up to 13-14psi on stock 350 truck injectors which will change their flow rating to 60lb/hr.
Each vehicle is tested extensively in stock trim to get baseline horsepower readings prior to doing any tuning. Stock 210hp 350 V8 up to 250hp the stock 55lb 350 truck injectors at the factory 11-12psi is fine. JET Does all of it’s testing and tuning on chassis dynamometers.
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