Our Performance Engines

A popular way to buy a performance engine these days is to buy a Crate Engine. Most Crate Engines we see in the market are mass produced engines. Typically, Crate Engines are manufactured in large factories that utilize “Machine Operators” and “Assemblers” that are not engine specialists. These individuals are trained to perform a specific task and do not understand overall engine assembly and function.


Marty Cochrane, from ProMax, says “We understand both the Production and Performance Industry”. Having come from a manufacturing background at Dana Corporation, and later operating one of only 4 PER (Production Engine Rebuilder) facilities in Canada, Marty understands the difference between a Custom Performance Engine and mass produced “Crate Engine”.

Gene Kucera of Promax knows the difference between the right parts and what you get when you buy "the big factory" crate engine. Gene has more than 35 years expierience in the perfomance industry. “Lots of people end up with a factory crate engine that needs different parts. Parts installed on “Crate Engines” are often incorrect for the intended application, or are inadequate for the intended usage. We see oil pans that don’t fit, flywheels or flexplates that don’t bolt up, incorrect balancers or flywheels, antiquated ignition systems, carburetors, and intake manifolds.”

Marty can also testify to other problems. “Machining is not what we are accustomed to in the performance industry. We find that deck heights are not even and square to the crank/cam centerline, decks are often different heights, and some are rolled over. Main bores are often at minimum resulting in minimal vertical oil clearance on main bearings. Most of what we see would pass in a stock production engine, but customers are paying for a Performance Engine designed to run at higher loads and RPM.”


Promax uses the latest CNC computer controlled equipment to machine the engines we sell. We can sell you a complete carb to pan “crate” type engine, custom built to your exact needs, or a Long Block Assembly (bottom and top end no covers), Short Block Assembly (bottom end only), or a machining and or parts package.




ProMax Performance - engines for racing, street/strip, street rod, muscle car and restoration

Chevy 383 stroker with weiand 177 blower
Chevy 383 stroker with fast ez efi
Chevy Econo 350
Chevy 383 stroker with fast xfi muliport sequential fuel injection
chevy small block 427 with wieand 8-71 blower
chevy 383 ls stroker with fast lsx manifold and fast 102 mm throttle body
chevy 6.0L ls with GM Performance Parts LS3 CNC Ported heads
chevy ls 383 with holley efi
ls 408 stoker with dart heads
chevy gen v 454 with edelbrock heads
chevy 496 with Billet Speciialties Serpentine Drive Conversion
chevy 706 with sonny's heads, sonny's custom intake, and fast xfi efi
pontiac 455 with fast ez efi, custom paint and march serpentine conversion
pontiac 455 with edelbrock heads, and factory cast iron type exhaust headers
pontiac 535 cid with aftermarket block, custom ported heads, and fast xfi 2.0 sequential multiport efi
forb small block 408 stroker with fast ez efi
ford small block 347 stroker with newest version of fast ez efi 1.0 efi
ford 289 with edelbrock e street heads
ford small block 347 stroker with fast ez efi
ford 390 stroker (438 cid)
buick 400 with edelbrock heads and t/a intake and valve covers