About Head Rush

Head Rush Racing Engines is Greg Walsh's shop, a few miles from Wellsville in the Southern Tier of New York. It builds racing engines for dirt karting, and not much else. Clones, Predators and 212s go in as production engines and come out as HEAD ACHE Series engines: measured, blueprinted to the AKRA, NKA or WKA rulebook you race under, head ported to the current specs, our own HR1.2 cam, the lightest legal parts we can find, and a run on the dyno before anything leaves the building. Engine number one thousand went out the door in 2024.

Most of the work is building, and the rest is keeping engines fast. Rebuilds and freshen-ups, head work, house engines for a racer who needs one this week, conversions of another builder's engine to HEAD ACHE spec, and the things that decide a weekend as much as horsepower does: tires cut and prepped, clutches built and rebuilt, the kart scaled and set up. If a part is needed, it is usually here in a day or two.

The shop runs on the dyno and on long nights. Every season's rule changes get tested before they get sold, and the results get posted, win or lose. Customers say the same thing in different words: you can call, you get the builder on the phone, and you get a straight answer.

Team Head Rush

Team Head Rush is the racers who run our engines, from first-year red-plate kids to adult clone heavy. Through 2026 they have won features and championships at AMS, KB Speedway, Stateline, the Little R, Genesee Kartway, Pittsfield, Lockhart, Weedsport, Ransomville and Evans Mills in New York and Pennsylvania, and farther off at Merrittville in Ontario, Miller Raceway and Jennings County in Indiana, the Georgia Karting Complex, and Silver Dollar and Slaton Speedways in Texas. In 2026 that included two track championships at Genesee Kartway, one of them a fifteen-for-fifteen season. The Team page keeps the list, and the Facebook page keeps it current.

Who we work with

Clutches from MartinBuilt. Graphics from Spats Race Graphix, who cut the decal on every engine. Safety gear from FervoGear, where Head Rush is a dealer. Tires through JC Tire Tech and chassis through Charger Racing Chassis. We sponsor local shows when we can, and once a year an engine goes to a deserving racer for the price of a raffle ticket.

Talk to the builder

Call or text 585-610-3027. Tell us your class, your track and your rulebook. PayPal, Venmo or cash.