Place your pulley face down on a flat surface, then put your ruler or caliper on top, measure from outside edge to outside edge across the circle of the pulley. Check carefully to make sure you are measuring across the center.
How do I measure the diameter of a Vortech pulley?
How do I measure the diameter of a Vortech pulley and/or crank pulley? Using a set of calipers, expand to slide over the center of the ribbed area and rest it at the top of the ridges, rotating caliper slightly to either side to help keep caliper ends from slipping into an individual groove.
How do you measure pulley size on a lawn mower?
Using a set of calipers, expand to slide over the center of the ribbed area and rest it at the top of the ridges, rotating caliper slightly to either side to help keep caliper ends from slipping into an individual groove. This will give you the most accurate measurement for the pulley size.
How to remove or install the supercharger pulley?
What is the best way to remove or install the supercharger pulley, and the appropriate torque specs for the supercharger retaining bolt? Using a plumber's torch, carefully heat up the outside perimeter of the pulley to be removed or installed, as this will help to expand the opening to ease installation.
How much Loctite do you put on a supercharger pulley?
About 25-30 ft./lbs is suggested for the retaining bolt. It is also recommended that a small amount of blue Loctite be applied to the threads prior to inserting the bolt in the input shaft and apply a small amount of anti-seize on the input shaft and key before installing the supercharger pulley.
How is pulley size measured?
Place your pulley face down on a flat surface, then put your ruler or caliper on top, measure from outside edge to outside edge across the circle of the pulley. Check carefully to make sure you are measuring across the center.
How do you determine pulley size from RPM?
Calculating Output Speed Using Pulley Diameters and Input SpeedRPM Output/RPM Input = Multiplication Factor. On a belt-driven fan the two primary speeds required are the RPM of the Motor and the RPM of the fan. ... Formula. RPM Input/RPM Output = Diameter Out/Diameter In.Formula. ... RPM Out = 1,002.13.
Does a bigger pulley on a supercharger make more power?
0:5012:26BOOST! - Upgraded Supercharger Pulley & Bigger Injectors - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd when the car is running it is spinning the supercharger faster and thus making more boost thisMoreAnd when the car is running it is spinning the supercharger faster and thus making more boost this pulley right here should make about 8 pounds of boost give or take about 1 pound.
How is sheave diameter measured?
0:462:29How to Measure a Sheave - YouTubeYouTubeStart of suggested clipEnd of suggested clipThis one uses a caliper you take the caliper. And place it to the bottom of the groove. And the topMoreThis one uses a caliper you take the caliper. And place it to the bottom of the groove. And the top of the shiv. Until they line up this is 0.5. Then you take that measurement.
What is the formula for a pulley?
Calculate the tension in the rope using the following equation: T = M x A. Four example, if you are trying to find T in a basic pulley system with an attached mass of 9g accelerating upwards at 2m/s² then T = 9g x 2m/s² = 18gm/s² or 18N (newtons).
Does a bigger pulley increase speed?
The bigger your driven pulley (vs the driver), the slower it will turn but the more torque it will produce. The smaller your driven pulley (vs the driver), the faster it will turn but the less torque it will produce.
What does upgrading a supercharger pulley do?
APR's Supercharger Crank Pulley Upgrade increases the diameter of the factory pulley from ~162mm to ~187mm, which in turn spins the supercharger ~15.4% faster. This results in a larger bump in horsepower and torque across the entire RPM range, as the supercharger is spinning at an even higher rate of speed.
How do you increase boost on a supercharger?
1:134:15Superchargers 101 - Displacement, Boost, and Volumetric EfficiencyYouTubeStart of suggested clipEnd of suggested clipBut how do you turn up the boost on a supercharger superchargers tend to move a specific amount ofMoreBut how do you turn up the boost on a supercharger superchargers tend to move a specific amount of air per revolution. So the solution is to move more air by creating more revolutions.
What does a reduced supercharger pulley do?
The Cravenspeed Reduced Supercharger Pulley will create more boost by spinning the supercharger quicker. There are 2 sizes of pulleys available, 15% and 17% reduction from standard.
What size sheave do I need?
The groove of a new sheave should have a diameter 5% greater than the cable diameter. Cables should not be run over sheaves if the sheave groove diameter is 10% greater than the cable diameter. The sheave groove should be machined to support from 135 to 150 degrees of the cable diameter.
How do you find the pitch diameter of a V belt pulley?
Pitch Diameter (P.D.) = (Pitch x Number of teeth) / Pi (3.14159) Timing belt pulley Outside Diameter (O.D.) further builds upon the relationship between the timing belt pulley and timing belt.
How do I know what size pulley I need for my electric motor?
7:2811:00How to calculate pulley size to set the Compressor speed - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo with a 10-inch compressor pulley 3600 rpm electric motor I needed a two and a half inch pulley.MoreSo with a 10-inch compressor pulley 3600 rpm electric motor I needed a two and a half inch pulley. For this thing to run at 900 rpm operating. So again you use the RPM of your electric motor.
What is the formula for calculating RPM?
For an AC motor, the number of poles and the frequency determine the no-load RPM....For a 60 Hz system with four poles, the calculations to determine RPM would be:(Hz x 60 x 2) / number of poles = no-load RPM.(60 x 60 x 2) / 4.7,200 / 4 = 1,800 RPM.
How do you calculate pulley speed?
Find the speed of the driven pulley by solving the pulley speed equation (N1)(D1)=(N2)(D2). D1 is the diameter of the driven pulley, D2 is the diameter of the drive pulley, N1 is the speed of the driven pulley and N2 is the speed of the drive pulley.
How do pulleys increase RPM?
The RPM of the first Driven pulley is transferred to second set Driver pulley and so on. To Decrease RPM, choose Initial Bottom pulley and work up. To Increase RPM select Initial Top pulley and work down. Drag the Rotate slider to animate the diagram and see the actual RPM reduction through all the pulley sets.
How Do I Measure My Pulley and Find the Right One To Buy?
The most common measurements used to find the right pulley or sheave are the outside diameter, inside diameter and the width. There are also a few other measurements that are helpful to know in order to find the right size pulley or sheave for your needs.
Measuring Pulley Outside Diameter
Place your pulley face down on a flat surface, then put your ruler or caliper on top, measure from outside edge to outside edge across the circle of the pulley.
Measuring Pulley Flat Diameter
You only need to get this measurement if you are using a flat idler pulley.
Measuring Pulley Width
Measure from side to side across where your belt sits, from outside edge to outside edge. The width dimensions on our site do not include the hub of your pulley.
Measuring Pulley Frontside and Backside Offset
The offset is the distance from the centerline of the pulley to the outside edge of the bore. On a V-groove drive, for instance, the centerline or “middle” of a pulley would be the lowest point of the V, and you would measure from there to the edge of the hub.
Measuring a Pulley's Keyway
A keyway is a notch made into the hub from the inside hole of a drive pulley and is where your key will be inserted to lock the pulley in place on the shaft. Most keyways are standardized to the shaft your drive pulley goes onto.
Measuring Pulley Pin Diameter
In the pulley world, a “pin” is a precisely-cut cylinder that links to the engineering standards of a specific belt type. During the design process, pulleys are “married” to a pin size which will be used in design processes for new equipment.
What is boost in a supercharger?
As we told you in Blower Basics (Part 1), boost is the amount of air pressure created by your supercharger and is the result of a combination of factors: engine displacement, blower displacement, and blower drive speed. A proper amount of boost is good—very good. A supercharger creating the optimum amount of boost can produce substantial power ...
Why use a bigger blower on a bigger engine?
Assuming a constant speed ratio between the engine and the blower, a larger blower will make more boost than a smaller one on the same size engine. As engine size goes up, the supercharger will begin to make less boost; therefore, it’s ideal to use a larger blower on larger cubic-inch engines.
How to make boost adjustments?
Keep in mind, you can make boost adjustments by running larger or smaller drive pulley sizes. You can use smaller pulleys (overdrive) to run a blower faster for more boost; you can add larger pulleys (underdrive) to run the blower more slowly for less boost. Using the popular 6-71 supercharger, the chart below shows you how pulley size can effect the boost pressure of a given blower:
What is the effective compression for 92 octane gasoline?
For street engines running on 92 octane gasoline, you should keep your effective compression to 12.0:1 or below, according to Weiand. Once you exceed the 12.0:1 effective compression mark, detonation begins to become more likely. Naturally, you can attempt to control detonation with boost retards and other modifications, ...
Is a supercharger good?
A proper amount of boost is good—very good. A supercharger creating the optimum amount of boost can produce substantial power gains and/or improved starting and low-end performance, depending on the supercharger style. Too much boost can be bad—very bad. It can lead to detonation, which can be catastrophic in forced induction engines.
Can you run a supercharger on a large engine?
However, it is not practical to run a small, overdriven supercharger on a large engine, because you would have to run the blower very fast to create a reasonable amount of boost. At some point, the blower would become inefficient and could actually heat up the air, causing loss of boost.
Can you run higher boost levels than those recommended in the chart?
Can you run higher boost levels than those recommended in the chart? Sure. But you’ll need to make modifications (covered in our next installment) to your engine to do it reduce the chances of detonation or mechanical failure. To bring safe, practical performance increases to your street-driven vehicle, follow Weiand’s basic recommendations above.
What is the best way to remove or install the supercharger pulley, and the appropriate torque specs for the supercharger retaining bolt?
Using a plumber's torch, carefully heat up the outside perimeter of the pulley to be removed or installed, as this will help to expand the opening to ease installation. When installing the pulley, apply a small amount of anti-seize on the input shaft and key, and then slide it on. Steel pulleys may rust themselves to the shaft if not lubricated. Never force or hammer on the pulley or supercharger shaft. It is also recommended that a small amount of blue Loctite be applied to the threads of the retaining bolt prior to inserting into input shaft and then torque to suggested 25-30 ft./lbs.
How do I measure the diameter of a Vortech pulley and/or crank pulley?
Using a set of calipers, expand to slide over the center of the ribbed area and rest it at the top of the ridges, rotating caliper slightly to either side to help keep caliper ends from slipping into an individual groove . This will give you the most accurate measurement for the pulley size. Do not measure with caliper resting in the "valley" of the ribs/grooves, or on the outer lips/flanges.
Why should I use Vortech pulleys?
Some non-Vortech pulleys available do not provide the precision fit and balance which are essential for performance and durability and are therefore not recommended. Never force or hammer on the pulley or supercharger shaft. The pulley should barely slip over the shaft when it is 75-80 degrees F. The key to keyway fit is also critical, as is balance. Always use a small of oil or grease on the shaft. Steel pulleys may rust themselves to the shaft if not lubricated.
What is the benefit of using Vortech pulleys over other aftermarket brand pulleys?
Some aftermarket pulleys available do not provide the same precision fit and balance that are essential for performance and durability , and are not recommended.
Why would a Vortech supercharger belt come off or wear unevenly?
The propensity for grooved belts to move over one or more grooves, or come off completely, is always due to an alignment problem. Either statically (the pulleys are misaligned due to an installation or tolerance problem) or dynamically (the loading or unloading of the system), mainly the mounting plate causes misalignment due to flex or movement. Misalignment can also be caused by over-tightening (and failing) of the belt which may be detrimental to the pulley bearing.
Can I operate a Vortech supercharger system without a fuel management system?
Even with a perfectly calibrated mass air flow system, you still need a fuel management unit for enrichment under boost. The air/fuel ratio must change from 14.7:1 (stoichiometric) naturally aspirated, to about 11.5:1-12.0:1 (rich) under full boost.
Can I use a 190 liter per hour fuel pump by itself and eliminate the T-Rex?
It is not suggested that the 190 LPH fuel pump be used without the T-Rex fuel pump. The biggest single contributing factor to engine damage is inadequate fuel delivery. Supercharged applications should have excess capacity rather than inadequate capacity as the damage that can be incurred is far more expensive to repair than the cost of the fuel pump.
