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6 Results Found For "ratio"

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Powermaster Ultra Torque High-Speed Starters

Powermaster Ultra Torque high-speed starters deliver 25 percent more cranking rpm at the flywheel than the standard Ultra Torque starters. They are perfect for use in blown alcohol engines, or any engine requiring higher than normal cranking speed. The Powermaster Ultra Torque high-speed starters feature a 2.2 kW, 3.0 hp motor and have a machined aluminum adjustable mounting block. They will fit all oversized and kickout-style oil pans with no clearance problems.

4.47 out of 5 stars ( 30 )

$335.99

Powermaster PowerMax Plus Starters

Powermaster PowerMax Plus starters are rated with high cranking torque and feature an offset gear reduction for increased performance. Their mounting blocks are made from durable billet aluminum and can be rotated in four positions to fit multiple locations. PowerMax Plus starters are available in either a natural or chrome finish and contain a tested dyno report in every box!

4.38 out of 5 stars ( 205 )

$197.99

$261.99

Powermaster XS Torque Starters

Powermaster's highly efficient XS Torque starters feature extra-powerful motors that churn out up to 200 lbs.-ft. of torque. Coupled with their 4.4:1 gear-reduction ratio, that equals reliable cranking power for engines, up to a whopping 18.0:1 compression ratio. These starters come with a billet adapter/mounting block for durability. They'll also clear your oil pan if the OE starter did. Some models are available in a chrome plated finish. Starter dyno test results are included. Order the replacement designed for your vehicle application.

4.57 out of 5 stars ( 910 )

$184.99

$426.99

Powermaster PowerMax Starters

With their gear-reduction drives, heavy-duty Powermaster PowerMax starters really crank out the power--180 lb.-ft. of torque. So, they can handle engines with moderate compression ratios. If your stock starter clears your oil pan, the Powermaster PowerMax starters will, too. Some will also clear kicked-out pans. Powermaster PowerMax starters can be mounted in multiple orientations to fit your needs. Starter dyno reports are included.

4.57 out of 5 stars ( 1160 )

$141.99

$281.99

Powermaster Mastertorque Starters

With their gear-reduction drives, heavy-duty PowerMaster Mastertorque starters really crank out the power--180 lb.-ft. of torque. So they can handle engines with compression ratios as high as 14.0:1. If your stock starter clears your oil pan, they will, too. Some will also clear kicked-out pans. A selection of Mastertorque starters can be mounted in multiple orientations, and some will work inverted with the solenoid down. They feature a black wrinkle finish and select models are available in a chrome plated finish.

4.57 out of 5 stars ( 626 )

$169.99

$222.99

Powermaster Street Series Alternators

Powermaster Street Series alternators feature all of the quality construction and dependability the company is famous for. The "electrical generators" are available in a variety of amperages and styles, allowing you to choose the best model for your specific ride and the accessories you run. So whether you need an alternator for your truck, hot rod, muscle car, sport compact, or audio competition vehicle, Powermaster gives you the power needed to get it started and keep it going. These race-inspired alternators offer great output to weight ratio. Here are more product details: For most people, the only alternator rating they're familiar with is the amperage rating. Alternators are spoken of as a 65 amp or 100 amp alternator. When replacing the alternator on the family car, this is probably the only information that's necessary. After all, all one needs is an alternator that matches the original. When building a custom car from the ground up, however, a deeper understanding of the power curve of an alternator is required. Usually a custom pulley or so-called "power pulley" set is used with a performance alternator. A mismatched pulley ratio and alternator will spell trouble, especially at idle speeds where alternator performance is critical. To avoid this, it's important to understand the alternator's capability at slow speeds. An alternator's output is dependent on speed, but this can be deceiving because this output is not linear. Instead, it follows a curve. Each alternator has a unique curve, and at idle small changes in the alternator's speed can make a big difference in its output capacity. Because of the preceding, pulley ratios are very important, especially when using high amperage alternators. The pulley that are supplied with the alternator are matched to the winding and power curve. It's important that any dress-up pulley sets do not deviate from this ratio. Typically, a street driven car should have a pulley ratio of at least 3:1. If the vehicle has an automatic transmission with a low idle and the vehicle spends a lot of time cruising, then a higher pulley ratio—perhaps 3.5:1—should be used. Alternators can take high speeds up to 20,000 rpm for short periods, so overdriving the unit is not a problem. The output of high amp alternators can drop off substantially under 2,400 rotor RPMs. Therefore, Powermaster does not recommend power pulleys with high amp alternators. Powermaster uses a state-of-the-art computer alternator dyno to measure the performance of each alternator they manufacture. Output curves, engine idle speeds, and alternator pulley ratios are carefully considered to assure good drivability at idle and slow cruising speeds.

Not Yet Reviewed

$308.99

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