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Q. Does the pitch of one brand impeller compare in performance to a different brand impeller with the same pitch?
A. No, unfortunately it is not as easy to compare impellers on watercraft as other types of drivetrain like typical gearing on most vehicles. Each of the impeller manufacturers today (including the original impellers on current PWC) measure the blade sweep in a different way. Which means the percentages of blade length per angle of progression vary from model to model. There are also many geometric differences between the different brands and models of impellers, for example- blade length, hub size, root angle, and position of the impeller in the pump. These and many other factors are at least as critical as outer blade angle, and all have a large effect on the load and efficiency within the pump.

Q. Does the number that my impeller is labeled mean that is literally the pitch of my impeller?
A. Not exactly. The numbers refer to the outer blade angle of each impeller blade. Although commonly used in this industry, the word pitch does not apply to a PWC impeller the way it does a boat propeller. Where the pitch on a boat prop refers to the distance the unit moves forward per revolution, PWC impellers use numbers that reflect the outer blade angle, which identify how aggressive the impeller is, and also as stated in the question is a “label” to distinct between other labeled impellers for ease of applying each impeller to a particular watercraft. The number of that angle cannot always be taken literally, because all of the impeller manufacturers today have been known to slightly change an angle or length of the blade to optimize performance, and not change the ID of the impeller because the label of that impeller is already known to perform with certain characteristics on certain watercraft.

Q. Does making a few modifications to my PWC like changing the pipe or raising the compression mean that I have to change the impeller to a different one?
A. Not usually. People commonly feel that they should or need to change the impeller with every modification made to the motor. This is usually not the case, typically the same impeller that works well in a stock application, works well on a boat that is classified as a limited. Our impeller recommendation charts will give you a very good idea of the type and pitch impeller that works best on each watercraft. Owners of watercraft modified to limited or more need to remember that a higher pitch does not always mean more speed, motors have a range that peak horsepower is produced, and the impeller can limit or allow the rpm's to reach a certain level.

Q. Does the combined weight of me and my passenger(s) make a difference on which impeller pitch I should buy?
A. Sometimes. The recommended impeller is determined to be an improvement when directly compared to the performance of the stock impeller. If the watercraft was carrying the same load previous to the impeller change, the increase will still apply. Sometimes people will drop down a step to maximize the acceleration of the watercraft when normally carrying heavy loads.

Q. If I buy an aftermarket performance impeller, will my watercraft gain top speed?
A. Not always. Some impellers are designed to increase top speed of the watercraft, some are designed to increase the acceleration, and sometimes we can squeeze both out of an impeller design. It is always best to specify the type of performance increase that you are looking for when purchasing an impeller, or refer to our Impeller application charts located in the impeller section of this web site.

Q. If I install an aftermarket impeller on my watercraft, how much performance gain should I expect?
A. The increases an impeller will provide whether it is top speed or bottom end, vary with each application. Sometimes we can get a specific design impeller to produce 2-3 mph top speed with no other modifications, and sometimes we can only promise 1-mph gain. Some impellers are designed specifically to reduce E.T., which are very popular for closed course racing, and recreational riders interested in more acceleration or towing power. Also, when we develop an impeller design that is more efficient than the original impeller, we offer a variety of choice's to accommodate the many different variables that are usually present like, rider weight, altitude, motor modifications, and the riders performance desires.

Q. If aftermarkets manufactured the original impeller in my watercraft, does that mean I already have the best impeller available?
A. Not necessarily. Solas /Skat-Trak are proud to manufacture impellers for some of the watercraft manufacturer's. The quality of the product will be uncompromised, but they don't always get to play a part in developing the impeller. Since they specialize in manufacturing performance impellers, they can spend more time than others developing a more efficient design. In that case, they may come up with a new version of a performance oriented impeller design intended to increase certain characteristics where the original impeller may be compromised.

Q. If I purchase a Stainless steel impeller, am I getting the same type of impeller that the professional racers use out on the racecourse?
A. Almost always. Every one of our impellers go through the same type of production process and quality control phases. There are a few exceptions to this question, and that is because the watercraft owner may have modified the pump in a way that an impeller off the shelf would not fit correctly, or the individual requests a special type of impeller and/or pitch.

Q. Does aftermarkets test each impeller design on the watercraft before selling them as a performance increase?
A. Absolutely. Developing a performance impeller is not as easy as it used to be. Countless hours are spent designing, prototyping and testing various impellers by R&D teams, as well as confirmations by reputable mechanics, engine builders and performance gurus before they determine the product to be sold. In the case that the impeller is not deemed a performance gain, but simply equal in performance to the original impeller, the customer would be informed of this prior to the purchase.

Q. Will a Swirl type impeller make my watercraft go slower?
A. Not always. Like all other impeller designs, there is a specific pitch recommended for each watercraft, and by installing the wrong pitch on your PWC in an attempt to maximize performance gains, you can actually lose performance. In most cases, the Swirl design maximizes low to mid range acceleration, while retaining top speed compared to the original impeller. This style is very desirable in closed course racing, or conditions where the water is usually rough. In some applications, we find top speed gains as well.

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