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Engine Builder Shop Solutions: December 2011

Avoiding Hydraulic Timing Chain Tensioner Trouble Be certain to carefully follow the manufacturer’s recommended torque settings when installing hydraulic (oil pressure fed) timing chain tensioners.  Over tightening the tensioner can result in distortion of the tensioner piston bore, which in turn can cause the piston to bind up in the bore instead of doing its

Besides Octane, What Else Should You Consider When Selecting a Race Fuel?

It’s entirely possible to generate more horsepower with a lower octane fuel if it’s designed properly with respect to its other key properties. It’s also possible for two fuels to have the same octane rating, but perform very differently due to their other key properties.?? 1.  OCTANE: Octane is simply a rating of a fuel’s ability to

Subaru WRX Engine Mods & Dyno Testing

Balancing ultimate performance within legal parameters and practicality is what Z Sport (www.zsport.com) is all about. I spent several hours being shown their clean and well-equipped shop in Everett, WA. Manager Charles Damewood and Owner Gary Watts both were very helpful in explaining what it is that Z Sport does, and how their shop makes

Understanding The Differences, Challenges Between Crankshaft Position Sensors

I have suggested to you to watch for this and make sure that you have that, and encouraged you to be certain that it is indexed to this position and so on.  But I don’t believe that I have ever written about watching out for damaged as-cast reluctor rings, spark triggers or whatever other name

1960 Indy 500 Winner Jim Rathman Dies at 83

Jim Rathmann, winner of both the 1960 Indianapolis 500 and the international 500-mile "Race of Two Worlds" in 1958 at Monza, Italy, died Nov. 23. Rathmann passed away in a hospice in Melbourne, Fla., nine days after suffering a seizure at his home. He was 83. Rathmann, who was inducted into the Auto Racing Hall

Cadillac 4.6L DOHC Cylinder Head and Block Cautions

The problem is cracking of the aluminum block casting around the cast iron liner (Figure 1). Knowing that this possibility exists, I strongly suggest that you take the time to make a close examination of the deck prior to doing any machining at all – and before you then spend numerous hours installing cylinder head

Engine Builder Shop Solutions: November 2011

Removing Mushroomed Lifters in Vehicle A good way to remove mushroomed lifters while the engine is still in the vehicle is to use the box that the new cam came in.  You will need to pull the mushroomed lifter as high as it will go in the bore and hold it there with a small

The Greatest Show(s) On Earth

Every time, it seems, one way or another, the announcer always managed to get in those lines. I always wondered which was the “Greatest Show” and which was only the “Second Greatest Show” on Earth. Well the year is rapidly coming to an end, but before it’s gone, we’ll have made our decisions about which

Importance of Manually Dressing Crankshaft Grinding Wheel

Mount the wheel dresser on the grinder table. Bring the rotating grinding wheel up close to the diamond and start the coolant flow. Never dress without coolant. Frictional heat buildup can cause the diamond to come loose or separate from its mount. Lack of lubricating properties, along with cooling, abrades the diamond needlessly. Best results

Hot Rodders of Tomorrow to Exhibit at 2011 PRI SHOW

Between August and June annually, high school students practice and prepare for the big game or the next challenge in their academic careers. High school auto-tech teams now have that same opportunity when they compete in the Hot Rodders of Tomorrow Engine Challenge. In conjunction with the PRI Show, the Hot Rodders of Tomorrow will

Powersports Engines Not Just ATVs and Snowmobiles

While consumers often distinguish the powersports market by its individual products, it is all under the same umbrella for manufacturers and dealers of this equipment. Engine builders doing work in this market will find that they can often make more working on less. The engines are small, but depending on the machine, the parts may

Pump Gas Nailhead Build Takes Innovative Engineering Skill

The nailhead has more in common with a pair of four-cylinder engines than a V8. Like a four, the nailhead is a torquey motor, making all its torque at idle and then, as the rpms go up, the torque goes down and the horsepower rises. Engine builder Guy Henson recently did a custom, high-tech build

Roster of Participating Manufacturers Set for SEMA Scholarship Engine Project

Nearly twenty SEMA-member companies have come together in support of a unique project that will benefit the SEMA Memorial Scholarship Fund. Their products are being used to build a big-inch small block Ford engine that will be auctioned off on eBay in conjunction with this year’s SEMA Show. The engine – which is being constructed

Influence of Grooved Main Bearings on Performance

It’s essential to understand that bearings depend on a film of oil to keep them separated from the shaft surface. This oil film is developed by shaft rotation. As the shaft rotates it pulls oil into the loaded area of the bearing and rides up on this film much like a tire hydroplaning on wet

Vintage Engines, Modern Results

His business card provides the data on “George’s Speed Shop Precision Racing Engines,” but doesn’t provide much of a clue of who George is or what he does. You might be surprised to learn that the George in this case is better known as “Ohio George” Montgomery, a legendary NHRA national driver. But if you

Smooth Moves: Today’s Surfaces Often Demand Different Finishes

When multi-layer steel (MLS) head gaskets became commonplace a number of years ago, there was a lot of concern that aftermarket surfacing procedures might not be able to reproduce the mirror-like finish that the vehicle manufacturers said was absolutely necessary to seal MLS head gaskets. The challenge was to duplicate the factory finish using out-dated

Competing for Diesel Dollars with OEM?Dealers

About 13 years ago we – like many members of this industry – our business was struggling because our focus was only on machine work – our sales basically imploded and we needed to change. In our internal discussions, we put this dramatic change to two things: First, efficient engine design (including things like electronic

Rebuilding the Chevy 3.4L/3.5L Engine

(Download the illustrated pdf here) We’re going to take a look at two of these engines, including both versions of the latest 3.4L that was used in the Chevy Equinox (and Pontiac Torrent) and the original 3.5L that was installed in several ’04-’07 Chevy cars and crossovers. And, we’ll give you an overview of what

PRI Offers Race Engine Builders Opportunities to Increase Efficiencies, Profit in 2012

The PRI Trade Show is being held December 1-3, 2011, in the North/South Building of the Orange County Convention Center, in Orlando, Fla. It is open to the racing trade only. You must be part of a racing business or professional race team to gain admission. “The PRI Trade Show is where you go when

Understanding and Servicing 6.0L/7.3L DIT?Engine Injector Cups

They may have heard the term before but many diesel owners don’t often understand their function. Most make the assumption that it has something to do with the injectors, but they really don’t inquire to know exactly what it means. Some have never heard the term or even know that the injector cups exist. As