Articles
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Selecting the Proper Valve Springs
Selecting the Proper Valve Springs Valve springs are one of the most critical components of your engine. It is very important to match the camshaft and it's potential RPM range with the correct spring rate. We will attempt to explain it in this article, but first lets go over some valve spring... -
Load-O-Matic Distributor & Spark Control Valve
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... -
Flow Testing the "Log" Cylinder Heads
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...
UPDATE 9-7-07
Classic Inlines is developing an aluminum head for the Big Six (240/300ci) Ford inline six engine. At the present time, we are having the pattern maker re-work the patterns as we were not happy with the results. For some strange reason, they made the head similar to a shoe box...
Forgotten Growl: The January issue of Muscle Car Enthusiast covers the history of the Arvinode Exhaust Systems, which is being reproduced by Waldron's Antique Exhaust. This exhaust systems is also being offered to inline enthusiast exclusively through Classic Inlines. In this article, you'll...
Six-Cylinder Performance & Economy Guide This tech article was printed in Hot Rod's Mustang Magazine, Volume #3. The article covers the popular Offenhauser Triple 1V modification, an Autolite 2V log conversion, the Duraspark II distributor swap, and other methods of increasing horsepower and...
Thoughts on Performance Building The 200/250 Ford Six Cylinder Engine
Why, yes, I always shift at 8000:
The 200/250 engine has a bulletproof 7-main bottom end that has ample strength to support fairly high levels of power and rpm. The stock oiling system is not bad at all. And the inline six...
Inline Power Potential was rewritten and published once again in Muscle Car Review. We had no idea the article was being reprinted, until our phone started ringing off the wall shortly after it hit the stands. I can't tell you how much we appreciate the editors at Primeda for publishing these...
The primary goal in designing and developing a new cylinder head, is the reduction of total ignition advance, while simultaneously increasing the air flow capabilities and chamber efficiency. By utilizing the best engineers and pattern makers, foundries and machinist, as well as the latest...
This page will give you a brief overview of our new aluminum cylinder head for the Ford small inline sixes (144/170/200/250ci). We will touch on our reasons for choosing the OZ250-2V platform (rather than a cross-flow) as well as the advantages, the flow test results, and estimated performance...
In 1980, Ford revised the castings of the 200 to incorporate a low mount starter. The bell housing pattern ended up as 2/3rd's of the small block V8 pattern. The top two bolts were placed differently due to the very short deck height of the 200 block. Mike Enren has taken one of these blocks and...
Classic Inlines offers rebuilt 1100-1V carburetors which are re-calibrated to eliminate the problems commonly found in factory calibrated carburetors, such as hesitation and/or flat spots. We currently have a fairly large inventory of 1V carbs in stock, which are rebuilt and ready to ship...
High-performance mufflers and exhaust systems are as much about looks and sound as they are about horsepower. Most people want mufflers and exhaust systems that look and sound as good as they perform. That's easily accomplished when the parts are new, but how about two or three years down the...
It has been published that headers will not work with A/C, this is an incorrect statement. What is true... is that headers will work with either Stock or After Market A/C, but it is not a simple bolt on upgrade.
Modifications are required to the compressor and/or alternator brackets to achieve...
One of the most common problems with the small six is blown header gaskets and/or exhaust leaks. However they can be minimized by following proper installation procedures. The use of locking bolts may help, but even then, leaks can and will occur if you don't torque the header flange bolts (or...
Do I really need a port divider? Will I get better performance or an increase in mileage? Will my exhaust system sound better with the port divider? Will a port divider help to prevent blown header gaskets? These are questions that have been asked and discussed many times on the fordsix forum...
Selecting the Proper Valve Springs
Valve springs are one of the most critical components of your engine. It is very important to match the camshaft and it's potential RPM range with the correct spring rate. We will attempt to explain it in this article, but first lets go over some valve spring...
The Pertronix Ignitor® converts the older points-type ignition system on classic cars, to a solid-state electronic ignition system that's completely concealed, providing a stock appearance. The kit includes new micro controller that installs in just a few minutes. Generally, it installs just as...
Understanding Rocker Arm Ratio
The rocker arm is the lever that transfers camshaft lobe motion to the valve. Its ratio determines how much the valve actually opens relative to the cam lobe lift. A 1.5:1 rocker arm multiplies the cam lobe lift by 1.5 — so a cam with 0.250" lobe lift produces...
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...