CI Tech Archive

Stock Non-Adjustable Rocker Assembly - Rebuilt 1.5 ratio, stock non-adjustable rocker arm assembly, fully assembled and ready to bolt on. Recommended for stock applications where the cylinder head and/or block have not been milled more than a total of .125". Stock Adjustable Rocker Assembly -...

Many racers and engine tuners have opted for state-of-the-art diagnostic equipment but have forgotten one of the simplest, as well as one of the most accurate tuning tools...... the vacuum gauge. When using any vacuum gauge keep in mind that they are all calibrated at sea level and read-outs in...

There has always been a huge debate over which is better, hooking the distributor to ported vacuum, or to manifold vacuum. Some say ported vacuum must be use, while others say you should use manifold vacuum (such as the author of the article below). We recommend using which-ever works best for...

How The Stock Load-O-Matic Distributor Works Here is a little clarification on how the "Load-O-Matic" distributor works, along with the infamous "Spark Control Valve" (or SCV). Not only is it important to know how they work, especially if your planning a carb swap, but how they work in...

If your building a performance motor, one of your first thoughts was probably 'How high should my Compression Ratio (C/R) be?" If so, you need to know the difference between Static Compression and Dynamic Compression, as Static compression is meaningless in itself. First, lets talk about the...

How to adjust your valves properly First, you need to determine if you have solid lifters or hydraulic lifters. Solid lifters were commonly used on the early 144/170ci motors, while hydraulic lifters were used on the later 144/170ci and all 200/250ci engines. However, this is only a rule of...

The ignition system is the part of your vehicle/engine that ignites the compressed fuel and air mixture in the combustion chamber. The system consists of a voltage supply (12-volt battery), an on/off switch (ignition switch), a distributor, a triggering device, ignition coil, spark plugs, and...

This article is about advance curves and HEI style Distributors. As such I would have to say that Steve Davis, the boss at Performance Distributors, is one of the most knowledgeable people in the country on this subject. Personally I have counted on a Performance Distributor to get the job done...

https://www.fordsix.com/archive/www.classicinlines.com/DizzyGear.html This article covers distributor gear failures which occur in Ford small (144-170-200-250ci) inline six applications with aftermarket, hydraulic or solid lifter, flat tappet camshafts. It does not cover roller cam gear...

The following basic camshaft installation tips have been drawn from experience and reflect the most common mistakes that result in premature camshaft failure. These are not meant in any way to replace the Original Equipment Manufacturers (OEM) installation procedures. These basic installation...

What is meant by Degreeing the Camshaft, and why is it necessary? The phrase "Degreeing the Cam" means you are making sure the camshaft's position in the engine coincides with that of the crankshaft, so that their rotations are synchronized. This is the only way you will know if the rise and...

Other related articles: Selecting the Proper Camshaft, Static vrs Dynamic Compression. While most of our customers know what lift and duration are, most have no idea what the term Lobe Center means, or how it effects the engines performance. Therefore the biggest obstacle to overcome when...

The charts below were calculated using Virtual Engine 2000's Cam Utility Program. The charts list both Static and Dynamic C/R's for a 200ci engine with a zero deck height, using varied chamber sizes and valve timing (intake close). Calculations were computed using a Felpro head gasket which has...

Original Source: https://www.fordsix.com/archive/www.classicinlines.com/HeadSwap.html First, let start by saying that all 144, 170, 200, & 250ci heads are interchangeable.... and while the valve size, chamber size (cc's), and intake/port volumes (cc's) changed over the years, all of the small...

This tech article is a "work in progress". Information will be added as it becomes available. Over the past few years we've flow tested several Australian 250-2V cylinder heads, as well as our own Aluminum cylinder heads. However we've always wondered how the cast iron "log heads" stacked up...

Bang for the buck, the Duraspark II distributor is hard to beat as a triggering devise for an electronic ignition system. Coupled with either the sock ignition box or an aftermarket control box (such as as the Dyna Module or MSD-6A) it is a tough, readily available, reliable distributor. Ford...

If you don't already know, there are numerous advantages to swapping out your old stock points style distributor for an electronic ignition system. In our opinion, regardless if you have a stock motor or a high performance rebuild, it's number one on the list for "Best Bang for the Buck"...

SMALL SIX SPECS - 144/170/200/250ci General Specs YEAR CI Chamber Intake Exhaust Log CC Adv HP Adv TQ 60-64...

Being able to "read" a spark plug can be a valuable tuning aid. By examining the insulator firing nose color, an experienced engine tuner can determine a great deal about the engine's overall operating condition. In general, a light tan/gray color tells you that the spark plug is operating at...