CP-CARRILLO Product Catalog

TOP FUEL & ALCOHOL

If you are using pistons in a Top Fuel or Blown Alcohol application you may be under the impression that all pistons from the many manufactures are virtually the same. They all have a pin bore, ring grooves, most have at least one valve pocket, and the crown is usually a flat top or a dome design. The forgings they are made from even look so similar that if there wasn’t the manufacture‘s name forged into the part the average racer would not know who manufactured the part. The differences between them are mostly in the quality, consistency, and subtle differences in shapes and clearances not detectable to the naked eye. This is no longer the case, thanks to CP-Carrillo! When CP-Carrillo entered these markets the logical step was to make parts that were similar to “what is working”. Of course our initial forgings included some updates, modifications and improvements. But with each revision we kept making them better. The basic piston structure still looked similar to everyone else’s. Many racing segments like Formula-1, NASCAR, Pro Stock and high end Road Racing began using pistons with an “inboard pin boss” configuration with more regularity and great success.

TA-X

ROUND

The OEM manufactures (first import and then domestic) began using this design in vehicles. CP-Carrillo was an integral part of this movement and to this day offers conventional round style pistons and inboard pin boss versions for those wishing to utilize its advantages. Because an inboard pin boss forging is more complex to forge and machine, the final product using this forging consumes more resources, and necessarily has a higher price than a conventional round style. CP analyzed all the factors and determined that a superior product, with a better ring seal, stronger crowns and skirts, and more durable pin bores could be made for Blown Alcohol and Top Fuel applications using this design. There would be a slight increase in cost, but it would be offset many times over by all the benefits. After completing research and design changes using Solidworks and FEA we produced prototype parts re-designed them each time after being run back to back and tested. Forgings were made and we began sell- ing pistons for Blown Alcohol applications with an inboard pin boss configuration. A unique and worthwhile design feature that we can incorporate into this new piston is a Tapered Pin Boss, which is used in conjunction with a CP-Carrillo Aluminum connecting rod that can be manufactured with a Tapered Pin End. This allows the piston and rod to have the largest contact with the wristpin in the highest stress areas.

NON TAPERED

TAPERED

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