Motorsport tuning. Calibrated for Competition.
Specialist engine development, tuning, mapping, motorsport electronics and race support for cars and motorcycles across Northern Ireland and Ireland.
At Simms Performance, we combine hands-on motorsport experience with the best specialist equipment and a technical approach to help competitors and performance enthusiasts get the best from their vehicles.
From engine development and ECU mapping to race preparation, diagnostics and trackside support, every project is approached with the same focus – performance, reliability and attention to detail.
Performance Built on Experience
Simms Performance was established by Ally Simms following more than a decade of hands-on experience within motorsport.
Having worked with race teams and supported competitors at some of the biggest events in motorcycle racing, Ally is now bringing that knowledge and experience into Simms Performance – providing specialist performance, engineering and race support services for both cars and motorcycles.
Whether you're developing a competition car, preparing a motorcycle for race day or looking for specialist help with tuning, mapping or electronics, Simms Performance provides a knowledgeable, practical and professional approach.
Why Simms Performance?
Race-Proven Experience
Over a decade of hands-on experience within competitive motorsport, applying proven engineering principles and practical knowledge to every project.
Specialist Knowledge
A methodical, data-driven approach supported by specialist equipment, technical expertise and a commitment to continuous improvement.
Versatile Expertise
A broad range of technical experience across different motorsport disciplines and performance applications, allowing us to adapt our knowledge and approach to the individual demands of each project.
Performance With Purpose
Performance is about more than chasing peak figures. Our focus is on developing reliable, consistent and usable performance, tailored to the demands of each application.
tell us about your project?
Whether you're building a competition car, developing a race bike or looking for specialist tuning, mapping or engineering support, we'd be happy to discuss your requirements.