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ARC Racing

Blog

Are You Unbalanced?

WEDNESDAY, OCTOBER 29, 2003 Are you Unbalanced?By Carl AmundsenSeveral years ago when we were developing our crankcase ventilation system for the Tecumseh Star engine, I got some seat-of -the-pants experience with the value and need of crankshaft balancing. I was accustomed to driving a 3” bore, 3” stroke test engine, which had one of our billet [...]

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Setting Ignition Timing

THURSDAY, MAY 8, 2003 Setting Ignition TimingBy Tom ColeAlmost every day someone calls or emails us asking how to set the ignition timing on their engine. It is an important topic because as little as one degree can be the difference between an engine that runs up front and an engine that sputters and pops its [...]

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Oil Clearance Is Not A Myth It Is A Calculation

TUESDAY, FEBRUARY 8, 2000 OIL CLEARANCE IS NOT A MYTH IT IS A CALCULATIONBy: Carl Amundsen Date:2/8/2000Over the years I have had many opportunities to discuss oil clearance with engine builders. Some are building for their own use, some are small shops while some are large. In any event when the question is posed "HOW DO [...]

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Does It Matter

Does It Matter? A common sense approach to engine building.Historically, human nature has taught us two basic things about the question "Does It Matter ?"1 - If a problem exists, and we have the capability to correct it, we tell the world "It Does Matter".2 - If we don't have any interest or desire to [...]

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Probable Cause of Most Rod Failures

TUESDAY, JUNE 1, 1999 Probable Cause of Most Rod FailuresTo help prevent engine failure, here's a few tips:For the most part, a quality billet connecting rod doesn't just break. There are several things that can really shorten the life of a rod of which bearing clearance is probably the most important and too much is worse [...]

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Dual Plane Balancing

Dual Plane BalancingWe receive lots of calls about balancing and one of the first questions is always, "What is DUAL PLANE BALANCING".If you read the book on it, and you had a background in engineering and physics, you could get a good understanding of it. The two terms that are used in the explanation are [...]

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The Art of Design and Production

THURSDAY, AUGUST 20, 1998 The Art of Design & ProductionBy: Randy Amundsen Date: August 20, 1998We probably have 20 calls a week from customers who are full of ideas and thoughts about designing or re-designing our products or someone else's product. Some have a brand new idea that they would like us to manufacture. We like [...]

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The 10,000 RPM Bomb

The 10,000 rpm BombSeveral times a week we get calls from people that have just exploded their engine and, for the most part, they're looking for answers as to why it happened. On occasion, they'll send us some of the parts (or the whole mess) for evaluation hoping that we can shed some light on [...]

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Rod Length Ratios

Rod Length RatiosThere are as many theories about rod lengths as there are any other subject that deals with racing.As strokes get longer, rod lengths get shorter and at some point in time, this will create a problem. We don't know if we've crossed the line yet, but we're definitely leaning on it. At the [...]

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Discovery By Fatality

WEDNESDAY, JULY 8, 1998 Discovery by FatalityRe: Crankshaft flex and side covers By: Lynn Cooley Date: July 8, 1998We all are aware that a crankshaft will flex and bend. What we don’t know, or should I say didn’t know, is how much. We also didn’t know what kind of specific problems the flexing would create.Obviously the [...]

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