Einstein Engines

Smart Power for Serious Racers

Backed by factory racing experience and proven speed secrets, Einstein Engines delivers high-performance kart engines built with precision, durability, and a winning edge.

Welcome to Einstein Engines!

Built from Experience. Tuned for Victory.

Thank you for taking the time to come snoop around a very informative website on kart racing engines and how it’s done.

I’m Rob Holubar, and my history starts early with engines as a Hillclimber in eastern Iowa, racing and building 750 Nortons and YZ490’s. I then worked on a very detailed education in internal combustion, and wound up in a Major Motorcycle Factory’s racing program as lead engine builder. I learned under Legendary Bill Werner, one of the greatest internal combustion tuners of all time with over 17 World Championships. I picked up some absolute speed secrets along the way, and we were very innovative in our development of making power last the full engine life cycle. We use the exact same equipment Rolls Royce and Ferrari use to assemble their power platforms. I have now brought these very proprietary methodologies to Kart racing engines!

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Years Experience

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Multi-Engine Optimization

Build Your Best from What You’ve Got

Got multiple engines and spare parts? We’ll disassemble, measure, and combine your best components to create a top-performing engine—or two. It’s a smart, efficient way to unlock hidden potential and maximize your investment.

What Racers Are Saying

Don’t just take our word for it—hear from racers who’ve experienced the Einstein Engines difference firsthand. From faster lap times to longer-lasting performance, their results speak for themselves.

This is the smoothest engine I’ve ever felt. Everything on it feels amazing just after the first session. There’s no weak points, only strong and stronger. Typical engines I’ve ran struggled in low and mid range and were okay, but great on the top end. This is amazing everywhere. I could feel everything just engaging and kicking, no lag just straight power. Coming out of low corners it feels amazing, mid range amazing, top end just feels wonderful. This first impression is amazing. Even the pull to start it up was smooth.

Nik

I've been running Einstein Engines for a couple of years and they've delivered flawless performance every time. The power is smooth, strong across the entire range, and incredibly responsive. It's clear Rob uses only precision equipment and attention to detail.

Jesse

Hi, my name is Gavin Ebersole, I am a 2x state champion and I wanted to share my experience with Einstein Engines and express how impressed I've been. Einstein Engines delivers consistent performance every race, and the acceleration is noticeably stronger compared to other engines I've tried. Even after multiple race weekends and 30 hours of runtime, it's still running like its brand new! I'll definitely recommend Einstein Engines to other racers because it is such a high-quality engine.

Gavin

The engines made a huge difference, Marin had her best weekend yet by far and Jakob was quick at times too, but unfortunately he was sick and wasn’t driving so good. Thanks for building us some great engines! Looking forward to seeing what we can do next weekend and to continuing to work together in the future.

Adam

I can’t say enough good things about Einstein Engines. I’ve worked with several engine builders over the years, and nobody delivers the level of performance, attention to detail, and customer care that Einstein does.

James

Smart Power for Serious Racers

Welcome to Einstein Engines!

Built from Experience. Tuned for Victory.

Our Featured Products