how to install scat connecting rods

An accomplished engine builder and technical expert, he will focus on the tech-heavy content that is the foundation of EngineLabs. Two aspects that play a big part in this load are the weight of the piston and rod assembly, and engine RPM. This does require the torque value applied to the rod bolts to be accurate.In the case of a clicker-style torque wrench, if the wrench has not been calibrated — or it is not always returned to a relaxed position after use — it is very possible the wrench could under-torque the rod bolt. SCAT also suggests establishing this value in a two-step process using ARP’s Ultra-Torque lube on the threads and also underneath the bolt head.

When I installed the rods using the tang down, numbers up method, I have two bumps or nubs pointed towards the front of the engine and two bumps or nubs pointed towards the rear of the engine. WHAT DIRECTION DO THE RODS GET INSTALLED TO THE PISTONS? The rod bolts should not be used to pull the caps into position.This enhanced process begins with a round bar of 4340-steel that is placed in an induction furnace. Because of the loads achieved, a doubling of the engine speed means a four-time (4x) multiplication of the load. We have connecting rods for various vehicle makes, as well as different lengths and journals. Two aspects that play a big part in this load are the weight of the piston and rod assembly, and engine RPM. Rotterdam, New York. This creates a grain structure in the cap area that forms around the cap. If you’ve invested thousands of dollars in a performance engine, calibrating the wrench should be considered part of the cost of building the engine.We decided to see if rebuilding a stock small-block Chevy connecting rod was less expensive than a stock replacement SCAT rod. Installing a set of Scat I Beam connecting rods onto a Scat crank. The round bar is pushed through a roller press that forms the steel into what looks like a weightlifter’s dumbbell with large and small ends.All Scat rods are ready to install with finished machine work on both the big and small ends. An accomplished engine builder and technical expert, he will focus on the tech-heavy content that is the foundation of EngineLabs. Any weight reduction here contributes to improved acceleration of the engine.Confirming bearing clearance is an important step in the build process, which demands that a quality rod-vise is clamped over the rod and cap when torquing the fasteners to prevent damage to the rod.As part of the interview for this story, Lieb also opened a discussion about rod-bolt torque. The old vw style rods had the bump or nub on top of the rods. That means foundation work with the rotating assembly is essential. I called Scat and gave them my part number and they told me they were a zero offset rod.

This is also why RPM is the most important area to consider.

For street-performance engines, even stock rods can handle the higher cylinder pressures from mild supercharged engines in compressive load situations.Each rod beam and cap is individually numbered to ensure the caps are never mixed.Of greater concern is what engineers call tensile load, which is a force that attempts to stretch or pull the rod apart. 1 0.

Thanks...on a stand-still until I can solve this issue.I installed a set of Scat I beams a few months ago and had one that I put upside down.

Jeff Smith, a 35-year veteran of automotive journalism, comes to Power Automedia after serving as the senior technical editor at Car Craft magazine. This reduced weight comes from the Formula 1-derived hole in the beam. The common assumption is that increased horsepower creates elevated cylinder pressures, especially in nitrous or supercharged engines, and these applications create the greatest load on the connecting rod.While the additional cylinder pressure does create greater compressive load on the rods, this is not really a serious concern, unless talking extreme power-adder-equipped race engines. The old vw style rods had the bump or nub on top of the rods.

During this process, the rods are cleaned, and the ARP bolts are coated with Ultra-Torque lubricant and tightened to the specific-torque value specified in the instructions included with the rods.This torque value will approach the bolt’s proper stretch dimension. SCAT 5/16″ H-BEAM CONNECTING RODS WITH ARP2000 BOLTS SET OF 4 CONNECTING RODS. SCAT also suggests establishing this value in a two-step process using ARP’s Ultra-Torque lube on the threads and also underneath the bolt head. Higher quality bolts provide more insurance against the dire consequences of an accidental over-rev.To underscore this point, a well-dressed small-block Chevy using a 600-gram piston, wrist pin, and connecting rod — in a reciprocating package with a 6-inch rod at 6,000 rpm — produces a tensile load of more than 11,000 pounds at 100 times per second. SCAT offers a complete line of both I-beam and H-beam rods intended for stroker applications.In the early days of popular stroker combinations, some engine builders’ answer to the clearance issues between the rod and the camshaft was to create additional clearance by grinding the connecting rod bolt head. The 1045 steel has a UTS rating of 82,700 psi. Tensile loading occurs when the piston changes direction at top dead center as the crankshaft pulls downward on the piston and rod assembly.In a four-stroke engine, this situation occurs twice.