Auto Machine Specialties

Auto Machine Specialties is a full-service Fresno engine machine shop building high-performance engines since 1984. It also reconditions industrial diesel engines and offers custom CNC machining and design.

Capabilities

• Engine machining and engine assembly
• Performance engines and hot rod services
• CNC head porting
• Engine dyno and chassis dyno
• Industrial diesel engine reconditioning
• Tractor implement and hydraulic cylinder repair
• Custom CNC machining
• CADD and design consulting
• Custom AN fittings and hoses

Industries served

Automotive performance, industrial and agricultural.

Request a quote

To request a quote from this shop, use the Request a Quote form. Tell us the part, material, quantity and deadline, and we will pass your request to the shop.

Performance Engines, Head Porting and Dyno Testing in Fresno: Auto Machine Specialties

Building an engine for performance is different from fixing one. Instead of returning parts to their original specification, a builder chooses parts and machining to reach a goal, such as quicker acceleration or reliable power at the track. That involves planning, careful assembly and testing. Drivers and racers in Fresno who want more than stock often search for an engine shop that handles the whole process. Auto Machine Specialties is listed here for precision machining, assembly, engineering and design, repair, engine rebuilding, cylinder heads, performance engines, CNC head porting, engine dyno, diesel engines, hydraulic cylinder repair and hot rods. This page explains what those services mean.

Planning a performance build

A good build starts with the goal. What is the vehicle, and how will it be used? What power level is wanted, and what will the budget allow? The answers guide choices about parts, machining and tuning. A parts list that works together beats a collection of individual upgrades.

Engine machining and assembly

Machining prepares the block, crank and rods to specification. Assembly then puts them together with careful measurements of clearances. Small differences in clearance can affect power and durability.

CNC head porting

Porting reshapes the passages in a cylinder head to improve airflow. Hand porting is an old craft, while CNC porting uses a machine that follows a programmed path to produce repeatable shapes. Airflow is only one part of the picture, so porting works best as part of a plan.

Engine and chassis dynamometers

A dynamometer measures power. An engine dyno tests an engine on its own, and a chassis dyno measures power at the wheels of a vehicle. Dyno testing helps with tuning and with checking that a build meets its goals. Buyers can ask what measurements are provided.

Hot rod services

Hot rods often combine old designs with modern changes. They may need custom parts, careful fitting and creative solutions. Share photos, parts lists and any existing paperwork.

Industrial diesel engines

Diesel engines in industrial and agricultural equipment also wear and need reconditioning. The work follows a similar process of inspection, machining and rebuilding, though the parts are larger and more robust. Provide the engine model and serial number.

Tractor implement and hydraulic cylinder repair

Farm and industrial equipment relies on hydraulic cylinders. Repair includes inspection, machining or replacement of worn parts and new seals. The shop may also repair implements. Describe the problem and the equipment.

Custom machining and design

Some builds need a custom part, such as a bracket, a spacer or a fitting. Design consulting can help create one. Custom AN fittings and hoses are common in performance builds, and they connect fuel and oil lines securely.

What to prepare

• Vehicle or equipment details
• Engine type and current condition
• Performance goals and budget
• Parts you already own
• Timeline, including any events or deadlines

Reliability matters

A performance engine is only impressive if it keeps running. Ask about the plan for reliability, such as cooling, oiling and fuel delivery, and not only peak power.

To start a project, use the Request a Quote form and we will forward your request to the shop.

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