Dynamometers and Dyno Operating Systems
The data collected while an engine is running on a dyno can be analyzed to maximize the power gains from various modifications (changes in the fuel mixture, ignition timing, valve timing, compression, the induction system, exhaust system, etc.). Performance engine builders use dynos to measure horsepower and torque so they can optimize engine performance. By
Engine Builders: Pistons and Rings – Hypereutectic, Valve, Installation
Though pistons can often be salvaged when remanufacturing an engine, sometimes they have to be replaced. The original pistons may have worn or damaged ring grooves, wrist pins or skirts, or they may have cracks. New pistons may also be necessary if the cylinders have too much taper wear and the block has to be
High Performance Piston Rings and Cylinder Finishes
Today’s performance ring sets are thinner, lighter and more conformable than ever before. Thinner, low-tension rings reduce friction for more usable horsepower. Less weight reduces ring groove pound out. Narrower rings also allow tighter tolerances and less blowby. All very good things when you’re building a performance engine. But they also require rounder, straighter cylinder
Coretalk: Cummins, Scania Joint Venture To Produce Next-Generation Fuel Systems
Cummins-Scania XPI Manufacturing LLP is a 50/50 joint venture, which builds on Cummins-Scania partnerships in fuel systems development and manufacturing that date to January 1992. The two companies currently produce the HPI fuel system, which eventually will be replaced by the XPI (Xtra-High Pressure Injection) system. The XPI common rail fuel system is expected to
Performance Pistons
Piston manufacturers are introducing new performance pistons for all of these applications as well as refining existing piston designs to reduce weight, and improve strength, durability and ring sealing. Piston design and manufacturing used to be a relatively low-tech process. Now, with the aid of finite element analysis and other computer modeling techniques, many aftermarket
Searching For The Complete Clean
Many shops have systems that work well for one but not so well on the other. Are there effective ways to clean both types of metal with one setup? The answer to that depends, in large part, on what you consider clean. Most shops have some type of cleaning equipment, whether it is an automated
Valve Guide Reconditioning
A valve loses about 15 to 30 percent of its heat through the stem. On the exhaust side where there is no cooling effect from the incoming air/fuel mixture, the guides are critical, because cooling through the stem is especially important for valve longevity. Worn intake guides or ones with too much clearance can also
Cleaning Equipment Maintenance
The saying, "An ounce of preventionis worth a pound of cure," definitely holds true when itcomes to the operation of cleaning equipment in rebuilding shops. According to David Zehren, product manager,stationary equipment for Georg Fischer Disa Goff, Inc., Seminole,OK, routine maintenance of cleaning equipment impacts all rebuilders,no matter how large or small. "The issue of
Cleaning – Do You Know Where Your Dollars Are?
Cleaning parts in the machine shop doesn’tcome cheaply. According to Automotive Rebuilder’s Machine ShopMarket Profile about 15.2% of engine machining and rebuildingproduction work involves disassembly and cleaning. According torebuilders that we surveyed, disassembly and cleaning accountedfor the highest percentage of total rebuilding production timein the shop. So there can be significant benefits to reducingcleaning costs
Low Cost Quality Honing For The Small Shop
My son and I run a small automotive machineshop doing engine rebuilding and custom machine work in ruralMissouri. We try to do the very best work possible all the time.Whether we are rebuilding a Ford 8N or a 427 Corvette engine,we use the same amount of care doing the job. When our customerspick up their
Cleaning With Jet Spray Washers: Replacing Solvent Cleaning Processes With Aqueous Cleaning.
As more environmental regulations phase outmany chlorinated solvents and ozone depleting chemicals, manyautomotive machine shops and engine rebuilding operations arereplacing their solvent cleaning processes with aqueous cleaning.Some argue that while replacement chemicals have been found, theirtotal safety and part cleaning applicability has not been researchedenough. According to many rebuilders and equipment makers, developmentsin aqueous cleaning
Mopar Engine Platforms – 318, 360
Chrysler Corp. hasn’t built a rear wheel drive, V8-powered car (with the exception of the Viper) since the turn of the decade. And the cars that harbored V8s beneath their hoods during the late 1980s were about as appealing to performance enthusiasts as the front-wheel driven vehicles that replaced them. In spite of that fact,
Shot Blasting Equipment Maintenance: Simple Does Not Mean Maintenance-Free
The technology of hurling steel or glass shot at more than 100 mph is pretty simple. But in the world of shot blasting machines, simple does not mean maintenance-free. The essence of these machines, no matter what their design, is that clean core parts come at the price of dramatic wear-down of media, as well
Valve Guide Repair Options
One thing you can almost always count on when rebuilding a cylinder head is worn valve guides. The guides experience a lot of wear because of the constant friction between the guide and stem. To make matters worse, positive valve seals on late model engines prevent the guides from receiving much lubrication. Side forces on