Cure for uncomfortably high clutch pedal on late-model street cars

Cure for uncomfortably high clutch pedal on late-model street cars

By Sam Logan: Most late-model street vehicles use an internal hydraulic clutch release bearing, sometimes called a concentric slave cylinder (CSC). Yet, unfathomably, many of them suffer from clutch engagement high on the pedal travel. For most drivers, this is not comfortable. Conveniently, Ram Clutches has introduced a pedal-height adjuster, which is situated inline between the hydraulic master cylinder and the slave cylinder. It is in effect, an accumulator in which a piston and spring are housed. When the adjustment screw is turned in to its fullest extent, the piston cannot move and the adjuster is bypassed. In fact, this is the condition in which the system should be re-bled. As the adjustment screw is turned out and the pedal depressed, the fluid flows into the adjuster and pushes the piston back. Once the cylinder is full, the remaining fluid is routed to the hydraulic bearing. This essentially introduces free-play to the pedal travel and lowers the point where the clutch engages, allowing the driver to adjust the pedal to the most comfortable driving position. A lower pedal also quickens clutch response. A bonus feature of this adjuster is its ability to control the travel distance of the release bearing. This prevents over-travel of the clutch fingers, which can lead to clutch malfunction at higher engine RPM. Applying the pedal-height adjuster’s resourcefulness to the competition clutch Also worth noting, original equipment manufacturers use pre-loaded release bearings that are in constant contact with the clutch’s diaphragm fingers while competition-style bearing makers do not. By contrast they seek maximum clutch clamping force and, therefore, require some free-play between the clutch release...
Obituary: Remembering Michael Giannone

Obituary: Remembering Michael Giannone

By Victor Moore: Michael Giannone founder and owner of the respected competition connecting rod company MGP, died on March 11 following a short period of illness. He was just 60. Born in Los Angeles, California, Michael, an enlightened and refined man was formerly part of GRP but left to form MGP in Colorado Springs in the mid-nineteen-nineties. His twenty-five year career had been devoted to pioneering designs and production of competition aluminum connecting rods and made many contributions to their development, including the ingenious concentric locking pattern. In fact, he loved what he did and thrived on presenting a solution for every problem. As many of us can testify when we saw him at the PRI show in Indianapolis in December 2014, he showed no symptoms of illness. “He looked fine,” says his nineteen-year old son, Anthony. ” When he entered hospital on February 19, they thought he had pneumonia. And for two weeks he looked and behaved like the guy we knew so well—smart and engaging—but when they investigated further they found cancer, which was so aggressive they were powerless to save him.” The cancer, which remains unidentified to the family so far, metastasized in his lungs but wasn’t lung cancer. Happily, for the family it is business as usual and Anthony, who has been working in the connecting rod factory since he was 14, has taken over the operation. “Though the events have been tragic,” he said, “I knew enough on the production side to keep the business running, so that part wasn’t such a huge hit.” Michael Giannone, who ardently navigated the seas of our choppy...
Dixon survived massive Top Fuel shunt

Dixon survived massive Top Fuel shunt

Larry Dixon’s recent spectacular crash during the NHRA Gator Nationals in Florida last month wasn’t his first encounter with a dragster falling apart. Though alarming he was fortunate his skyward wreck landed inside the track wall where it skidded to a halt and not in the unforgiving earth beyond the wall. Watch: https://www.youtube.com/watch?v=e0xVHPiKRec Images: http://markjrebilas.com/blog/?p=21971#more-21971 Dixon (48) is a formidable NHRA Top Fuel contestant. In 108 final-round appearances he won 61 (54 percent) and by the end of the 2011 season he had notched-up 637 round...
Big-Block Chevrolet: World Product’s Merlin III Adds Deck Height

Big-Block Chevrolet: World Product’s Merlin III Adds Deck Height

World Products American-made Merlin III cast-iron big block is now available with an extra .050″ of deck height. For the Chevrolet, this new feature allows greater versatility in selecting connecting rods and particularly in selecting pistons with additional compression height to keep the ring grooves and wrist pin bore isolated. The new Merlin III variant is available with a 9.850″ or 10.250″ deck height. Cylinder bores are semi-finished at 4.595″ allowing for a finish hone to suit the specific pistons and ring packages chosen by the engine builder. Cylinders can be safely bored to 4.625″ and with minor clearance the 9.850″ deck Merlin can accept up to a 4.375″ stroke crankshaft and the 10.250″ deck can accept up to a 4.750″ stroke. Nodular iron 4-bolt main caps are used with ARP fasteners for maximum strength. The Merlin III is cast from high strength iron alloy and precision machined on CNC machining centers for dimensional accuracy. World’s priority-main oiling system delivers lubrication to the critical main bearings first for reliability at high rpm. Head bolt holes are blind-tapped and do not go through into the water jackets. The valley has bosses machined for four extra head bolts to accommodate race heads which utilize this feature. The oil pan rails are machined to accept both stock pans and aftermarket race pans. World’s Merlin III big block is an ideal choice for a wide range of performance engine configurations. Part numbers for the upgraded blocks are: 081107 MERLIN III bare block,   9.850″ x 4.495″ Nodular splayed 4-bolt caps 081117 MERLIN III bare block, 10.250″ x 4.595″ Nodular splayed 4-bolt caps   Like...
CP-Carrillo: X-style pistons for power-adder engines

CP-Carrillo: X-style pistons for power-adder engines

Irvine, CA: CP-Carrillo is introducing a new X-Style series of pistons for power-adder engines. Available for Top Alcohol Hemi applications with plus or minus 4.467in bores and Hemi canted valve for Pro Mod with plus-or-minus 5.000in bores, these pistons include several advanced features including the ability to run narrower rods and shorter pins, often resulting in reduced weight for most applications. BUILT TO LAST Manufactured from 2618 T-61 alloy, these pistons utilize an “X” forging for added structural support and durability. In addition, they can be designed with buttons or with wire locks and include vertical or lateral gas ports as well as forced pin oiling. OTHER TECHNICAL ELEMENTS Developed through rigorous testing and R&D – including recent wins in all the alcohol classes – the X series is available for IMMEDIATE delivery and suits most popular Dragster, Funny Car, and Pro Mod-type applications. DROP-IN READY Join the winning race teams that have chosen CP-Carrillo pistons and rods, and get them off the shelf! CP-Carrillo’s X-style pistons are ready to drop in to an engine and should improve horsepower and durability out of the box.   BACKGROUND CP-Carrillo is a company totally dedicated to pistons and connecting rods. Experienced sales specialists provide unique piston and rod solutions for myriad engine applications. The company continuously endeavors to combine manufacturing excellence, product guidance, and ongoing technical support to effectively address customers’ needs.   For more company information please review our website: www.cp-carrillo.com CP-Carrillo is a member of PANKL Racing Systems. Contact: CP-Carrillo 1902 McGaw Irvine, CA 92614 949-567-9000 phone 949-567-9010 fax...
Prudomme on the current state of racing

Prudomme on the current state of racing

Don Prudomme confounded the drag racing world by establishing the best win record in NHRA history – winning over 250 Top Fuel rounds losing fewer than 30. He went on to conquer four NHRA Funny Car champion-ships and now compares current conditions to those that existed then.

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