When asked about a manufacturer of high performance engines, the majority of American V engine enthusiasts name S&S. The engines still power more custom bikes than all the others put together and they have always been our first choice when it comes to upgrading standard machines with extra power and performance. The sometimes quite tame standard Harleys are thus transformed into respect-inspiring muscle bikes in the blink of an eye. S&S sums it up very aptly in their motto "Proven Performance".
The typical stroker engines of the 60s and 70s were rather crude units compared to today and established a reputation of high unreliability and low durability. But that was a long time ago and S&S has made great strides in its company history, not only in terms of performance, but also in reliability and mileage.
Double the power with longevity same as stock - is this possible?
Unfortunately, the performance depends on which restrictions - depending on the country - must be observed for the air filter and exhaust system, so as not to attract too much attention from the "authorities". Lifetime is also possible, the materials used give that. Who restrains himself during the running-in and prepares the engine for its years of service with understanding, and then demands the S&S engine like every other only then correctly, if it was driven properly, is on the best way to long durability. Answer to the question in one sentence: Buying a factory assembled S&S engine is in our opinion the safest way to achieve this goal.
How do I know that I have a true S&S engine?
All complete engines come with a certificate confirming that it is "The Real Thing". If this certificate is missing, it should be assumed that the unit was not assembled at S&S in Viola WI, USA.
Are there spec sheets of the power available?
No, there aren't any. The power output of the individual engine idepends too much on parts such as the air filter and exhaust. If you need performance data for certification, you have to go to a dyno. Anyone who needs the displacement for the tax may look in the certificate.