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1. Marine Engines  

JMS has been building and racing boats for over 25 years. The Marine market has very special needs and JMS is capable of meeting those needs. We have offshore, drag, circle and ski race boats competing at the top levels of competition.

JMS can design and build your boat engine from regular 454 Chevy's to our blown 600 cu. in. monster motors. While producing the torque necessary to propel a boat through the water JMS also prides themselves on outstanding reliability. With numerous class wins and world records JMS has the background to make your boat engine buildup an affordable and enjoyable experience.

   
2. Performance  

Pro street cars have become a big part of the JMS customer base. With their big tires they need big horsepower like this Willy's blown 502 Chevy. Along with the power, drivability is also very important. JMS has years of engineering these type of needs in their power plants.

   
3. Engine Dyno  

JMS has a 1500hp DTS dyno and the experience to run it. This very versatile dyno has seen the likes of blown Alcohol big blocks to 150 hp Model A engines. JMS can break in, tune, check your engine for leaks and have your new engine ready to install.

No need to worry about pulling your engine back out because of a small problem that could have been fixed in the dyno. The JMS dyno has been used by many magazines and accessory company's for research purposes.

All of this knowledge is transformed into your product. The information attained on the dyno is essential in choosing stall converters, gear ratio etc. Knowing where your engine makes it's power and torque makes setting up your car or boat much easier.