Evans Tuning Tech Articles

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Tuning Basics (Tuning 101)

What is Tuning? Tuning (also referred to as engine tuning or Dyno Tuning) is the process used to alter the stock computer, and ultimately, how a car runs. This is typically done after adjustments to the car's stock configuration have been made. For example, if a turbo kit was installed on a car that was not equipped with one from the factory, tuning would be necessary to make it run properly and safely again. Reasons for Tuning Stock engine computers are tuned to specifically operate a car with the factory setup.... Read More

OBD-1 ECU Codes

What they mean, and how to fix them. With the design of the Honda engine control unit (ECU), an error system was implemented when a vital engine sensor stopped reading correctly. The error system that was implemented used "codes", or a series of blinking "CELs" or check engine light to signify the faulty sensor(s). The check engine light is located on the gauge cluster, and when lit solidly, signifies a sensor issue. It can be as simple as a single sensor, or as complex as multiple sensors causing the CEL to be activated. For 92-01 Acura Integras, 92-00 Honda Civics,... Read More

Horsepower to Parts Charts

Where are the horsepower charts? While the aftermarket performance industry has evolved, our horsepower charts have not. Unfortunately, while we are constantly working with our clients to recommend the best parts for their setups, our competitors continued to use the outdated data on these charts. We have decided that until a new system is built that it is best for the industry if we remove the outdated material from our site. Where should I get information on parts? We recommend the following two options for the most up to date information until we're able to rework new charts: Email... Read More

Engine Management Comparison

Comparing the most popular engine management systems. The decision of which engine management system to use can be a complex, overwhelming decision to make for the first time for enthusiasts or even an experienced tuner. In essence an engine management system controls the precise amount of fuel and ignition timing to an engine in all operating conditions. It is with this precise control that you can make performance modifications to an engine such as increased compression, larger camshafts, higher flowing intake and exhaust systems, as well as nitrous and boost and retain fuel economy, drivability and power. The main aspects... Read More

Boost Controller Comparison

Comparing the most popular boost controllers. Boost controllers can be simplistic and complex, vary in features and cost, as well as work excellent in some applications while doing poorly in others. Evans Tuning has gotten literally hundreds of emails over the past few years concerning which boost controller we recommend to use, and while it would be nice to recommend a single boost controller to do it all, no such one exists. First and foremost as the consumer, you have to make an honest and educated decision as what you want out of a boost controller. What are you going... Read More

[VIDEO] How to build a GSR Engine.

The definitive video guide to building an engine. This video is very in-depth with three separate break downs of the blueprinting and assembling. There are many high precision measurement tools used in the video that are essential for accurate clearancing of the main and rod bearings. Plastic gage was used to double check the measurements, but should never be solely trusted by itself! Often times plastic gage can give false readings, and should be used for comparison purposes ONLY! A Helms shop manual should be used in conjunction with the assembly for torque measurements and any other clearance specs. The... Read More

[VIDEO] How to swap a B-Series Differential.

Learn to how to tear down a transmission. The video is very indepth with three seperate break downs of the installation. The only step that was not shown is checking the side to side play after the differential was installed. This needs to be checked, although 99% of the time if the same style differential bearings are used, the clearance is within factory tolerances. Differential Swap Tech Article -- Part 1: Disassembly Differential Swap Tech Article -- Part 2: Preparing the Differential Read More

How to swap B-Series camshafts.

The quickest way to swap camshafts. You'll find that the tech article is in video format. We did this for numerous reasons, but primarily because audio and visual demonstration give the best learning techniques. Most of our future tech articles will be in video format for your learning and viewing pleasure. The idea behind showing how to swap cams is much different than what any shop manual will demonstrate. The method displayed in the videos allows me to swap camshafts on the dyno in less than 20 minutes in most cases. The largest difference is that the timing belt tension... Read More

How to build a GSR Engine.

The definitive guide to building an engine. This article is to address any questions on how to properly build a GSR shortblock. The components used were Manley/Full race connecting rods, CP 81.5mm 9.8:1 pistons, OEM bearings and other OEM components. Before I begin this article the shortblock was overbored from 81mm to 81.5mm. Overboring the cylinder walls 0.5mm is proper engine building technique. This is done to ensure that the cylinder wall is a true circle from the top of the bore to the bottom. The list of tools that you'll need to do a proper bottom end assembly are... Read More

Compressors and Turbines Explained: Part 1

Turbochargers while simple in design, can get very complex in theory. From deciding what compressor trim is desired, to what turbine housing to be used is confusing to most who enter the field of forced induction. This article will hopefully take away all the confusion in turbocharger selection. Terminology Before I can begin writing an article explaining turbochargers, terminology must be learned. Here is a list of the more commonly used turbocharger terms: Compressor - Essentially a fan that spins and compresses air within an enclosed area (compressor housing). In order to allow the air to compress and build pressure... Read More

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