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per injector.
WITCHHUNTER PERFORMANCE WitchHunter Performance uses specialized equipment for fuel injector testing. Our ASNU Fuel Injector Flow Testing and Cleaning Machines . The ASNU is pretty much the standard for injector servicing. WITCHHUNTER PERFORMANCE This one has four holes. This injector has 10 holes in the diffuser plate and sprays in a "V" pattern. This newer style injector has an extended tip with a "V" spaped spray pattern bent 25 degrees off axis. Last, we will look at the spray pattern of a TBI, throttle body injector. It is located where the carburetor used to be and the fueldoesn
WITCHHUNTER PERFORMANCE Variation of the the test fluid temperature can cause up to 2 % change in readings, depending on what fluid is being used. Even gasoline flow is affected by temperature changes. WitchHunter continuously pumps the fluid out of their machines, filters it through a 40 micron and then a 2 micron filter, the fluid is then heated or cooled as needed WITCHHUNTER PERFORMANCE WitchHunter Performance - Fuel Injector Cut-away. 9am - 6pm M-F (Pacific time) We are not accepting local drop-offs at this time. info@witchhunter.com. WitchHunter Performance. Duvall, WA. WITCHHUNTER PERFORMANCE Fuel Injector Connector types. Various types of electrical connectors are used on fuel injectors, all of them have just two contacts. and most of the newer designs are waterproofed to prevent corrosion. Each will require the proper type of connector. FUEL INJECTOR CALCULATOR FROM WITCHHUNTER PERFORMANCE This guideline can help in determining what injector size to use. * Brake Specific Fuel Consumption: is the amount of fuel consumed (in lbs. per hour) for each horsepower made. This should be .45 to .50 for naturally aspirated engines, .55 to .60 for supercharged engines, and .60 to .65 for turbocharged engines. WITCHHUNTER PERFORMANCE Fuel Injector Flow Rates & Pictures. Many sites have fuel injector flow data but most of the data was copied from various places using different methods, test pressures, fluids, etc. Click here to read why shops get varied results This data was obtained from actual flow bench testing at our shop and should be used as a guide only. WITCHHUNTER PERFORMANCE Fuel Injector Impedance. A fuel injector is a electrical-mechanical valve that uses magnetic field from its coil winding when current is applied and pulls the metal pintle back away from it's seat to allow fuel to flow. A spring returns the pintle to the closed position when no electrical current is flowing. WITCHHUNTER PERFORMANCE Squeeze the two tabs on the injector connectors to remove them. Remove the 8 Torx screws holding the top cover in place. I used a large screwdriver to gently pry the top cover loose. With the cover removed, grab the center of the injectors an rotate it to break it loose and pull to remove. Here is the assembly with the injectors removed. WITCHHUNTER PERFORMANCE WitchHunter Performance offers fuel injector cleaning and flow testing with our computer controlled injector testing machines. We provide professional ultrasonic injector cleaning and can flow test up to 8 injectors at once for an accurate side by side comparison. only $23per injector.
WITCHHUNTER PERFORMANCE WitchHunter Performance uses specialized equipment for fuel injector testing. Our ASNU Fuel Injector Flow Testing and Cleaning Machines . The ASNU is pretty much the standard for injector servicing. WITCHHUNTER PERFORMANCE This one has four holes. This injector has 10 holes in the diffuser plate and sprays in a "V" pattern. This newer style injector has an extended tip with a "V" spaped spray pattern bent 25 degrees off axis. Last, we will look at the spray pattern of a TBI, throttle body injector. It is located where the carburetor used to be and the fueldoesn
WITCHHUNTER PERFORMANCE Variation of the the test fluid temperature can cause up to 2 % change in readings, depending on what fluid is being used. Even gasoline flow is affected by temperature changes. WitchHunter continuously pumps the fluid out of their machines, filters it through a 40 micron and then a 2 micron filter, the fluid is then heated or cooled as needed WITCHHUNTER PERFORMANCE WitchHunter Performance - Fuel Injector Cut-away. 9am - 6pm M-F (Pacific time) We are not accepting local drop-offs at this time. info@witchhunter.com. WitchHunter Performance. Duvall, WA. WITCHHUNTER PERFORMANCE Fuel Injector Connector types. Various types of electrical connectors are used on fuel injectors, all of them have just two contacts. and most of the newer designs are waterproofed to prevent corrosion. Each will require the proper type of connector. FUEL INJECTOR CALCULATOR FROM WITCHHUNTER PERFORMANCE This guideline can help in determining what injector size to use. * Brake Specific Fuel Consumption: is the amount of fuel consumed (in lbs. per hour) for each horsepower made. This should be .45 to .50 for naturally aspirated engines, .55 to .60 for supercharged engines, and .60 to .65 for turbocharged engines. WITCHHUNTER PERFORMANCE Fuel Injector Flow Rates & Pictures. Many sites have fuel injector flow data but most of the data was copied from various places using different methods, test pressures, fluids, etc. Click here to read why shops get varied results This data was obtained from actual flow bench testing at our shop and should be used as a guide only. WITCHHUNTER PERFORMANCE Fuel Injector Impedance. A fuel injector is a electrical-mechanical valve that uses magnetic field from its coil winding when current is applied and pulls the metal pintle back away from it's seat to allow fuel to flow. A spring returns the pintle to the closed position when no electrical current is flowing. WITCHHUNTER PERFORMANCE Squeeze the two tabs on the injector connectors to remove them. Remove the 8 Torx screws holding the top cover in place. I used a large screwdriver to gently pry the top cover loose. With the cover removed, grab the center of the injectors an rotate it to break it loose and pull to remove. Here is the assembly with the injectors removed. WITCHHUNTER PERFORMANCE Fuel Injector Connector types. Various types of electrical connectors are used on fuel injectors, all of them have just two contacts. and most of the newer designs are waterproofed to prevent corrosion. Each will require the proper type of connector. WITCHHUNTER PERFORMANCE Injectors are externally cleaned, visual inspected, and numbered. Test injectors for resistance, shorts, and current draw. Perform leak test, spray pattern, resistance while operating, and flow testing, (both pulsed and static), on one of our flow benches. Our modified test machines are set up specifically for various types of injectors. WITCHHUNTER PERFORMANCE Top-feed. Top-feed injectors have the gasoline entering from the in the top and exits the bottom. These early designs had provisions for fuel to enter through a rubber hose attached to the top. We refer to these as hose-end injectors. Next in this category are the most common type of top-feed injectors. The use an o-ring on the fuel inlet end WITCHHUNTER PERFORMANCE Bosch top feed. Probably the most common type in use. Fuel goes in the top and exits out a single hole in the bottom. Most have a high impedance coil and uses a tapered needle (pintle) that seals into a tapered seat until energized. WITCHHUNTER PERFORMANCE Welcome to the WitchHunter Performance Fuel Injector Basics page. We will attempt to pass on some fuel injector knowledge and dispel misinformation that is circulating on the web. This a work in progress and plan to add more information as time permits. Injector types. Impedance. Connectors. Spray Patterns. Pintle caps - coming soon. WITCHHUNTER PERFORMANCE 2) Be suspicious of any shop that make outrageous claims. Guaranteeing that your injectors will flow within certain percentage after they are done with them. Since most fuel injectors can not be adjusted to change flow slightly, and even new injectors flow can vary, claims like this is a lie. Most likely, places like this are changing thetest
WITCHHUNTER PERFORMANCE Various GM late 80's to early 90's (gray or black top) Verify the resistance is within 10% of each other. Normally 12-16 ohms. Bosch top-feed external leaking from where pintle stem and main body meets, (just above lower o-ring). Also possible leaking where upper plastic meets metal body. Mid to late 80's Porsches and BMWs. WITCHHUNTER PERFORMANCE Contact us if interested. 1 (Set of 4) Matched Denso 23250-74090 440cc side-feed injectors with test data. $160 shipped. WITCHHUNTER PERFORMANCE SHIPPING INSTRUCTIONS Packing and shipping. Wrap your injectors individually in a paper towel and put them in a plastic bag to keep the package from smelling of gasoline. This keeps the shipping folks happy. It is recommended that your injectors are shipped in a box and not in a padded envelope to keep them from getting damaged. Please get delivery conformation ora
WITCHHUNTER PERFORMANCE All testing is done using a certified flow testing fluid. WitchHunter Performance uses the SAE standard J1832 as a guideline for our shop methods. This is the technical standard for testing gasoline fuel injectors by the Society of Automotive Engineers. The owner has worked 20+ as an electrical engineer in the past, and has also worked withthe
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SUBARU INJECTOR MODS FOR SALE TESTIMONALS Contact us __ PROFESSIONAL FUEL INJECTOR CLEANING AND FLOW TESTING SERVICE WitchHunter Performance offers fuel injector cleaning and flow testing with our computer controlled injector testing machines. We provide professional ultrasonic injector cleaning and can flow test up to 8 injectors at once for an accurate side by side comparison. COMPLETE CLEANING AND FLOW TESTING OF GASOLINE INJECTORS FOR ONLY $23 PER INJECTOR. PRICE INCLUDES PARTS AND BEFORE/AFTER TEST DATA. Click Here for Shipping Instructions WHY HAVE YOUR INJECTORS CLEANED? OFF-THE-CAR injector cleaning and testing is the only way to verify that each injector is doing its job and allowing each cylinder to operate evenly for peak performance that can also improve fueleconomy.
Replacement cost of a new fuel injector can be $150 or more. With our cleaning service, we can restore most fuel injectors to like-new condition for a fraction of the cost of a new injector. Most injectors can be restored to a like-new condition through our ultrasonic cleaning process and then verified with our testing process. On today's computer controlled engines the oxygen sensor(s) can only average the air / fuel mixture of all the cylinders. This can cause some cylinders to run rich and others to run lean if all the injectors are not flowing equally. Side by side flow testing is the only way to verify they are working well together. We can also service cold-startinjectors.
CURRENT TURN TIMES
AS OF 3/11/20 OUR BACKLOG IS ABOUT 30 DAYS... DUE TO ILLNESS. WE WILL NOT BE ACCEPTING MORE INJECTORS FOR THE NEXT FEW WEEKS. WitchHunter Performance is full-time injector shop with 15 years of servicing fuel injectors. We do one thing... AND WE DO IT WELL. WE LIKE WHAT WE DO FOR OUR CUSTOMERS * Increase performance* Save fuel
* Reduce pollution
Please take the time to look through our site, it has a lot of usefulinformation.
WE ARE STARTING TO SEE QUITE A FEW CHINESE MADE INJECTORS THAT ARE JUNK, MOST HAVE THE FACTORY PART NUMBER AND NOT THE CORRECT LOGO. BE CAREFUL WHEN PURCHASING SO-CALLED, NEW INJECTORS FOR A VERY LOW COST. WE DO NOT SERVICE DIESEL, GDI, (DIRECT INJECTION), GM SPIDER, OR CISINJECTORS.
Please contact us if you are unsure if have any of these. 9AM - 6PM M-F (PACIFIC TIME) WE ARE NOT ACCEPTING LOCAL DROP-OFFS AT THIS TIME. info@witchhunter.com WitchHunter PerformanceDuvall, WA
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