Classic Cubes From An LS1 Part 1
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The factory rods (left) are a powdered metal construction featuringcracked caps and a pressed-pin design. Due to the construction methodsemployed, resizing of the big end of the rod isn't feasible as it limitsthe choice of available bearings, with no performance or race bearingsoffered. Stock rods are fairly stout but insufficient forhigh-horsepower applications. The rods weigh 650 grams and have a lengthof 6.098 inches. In contrast, the Lunati Pro-billet steel rod is of"barrel-shaped beam" construction and features a full-floating pin andbronze bushings on the small end of the rod. Weighing 630 grams andfeaturing Lunati rod bolts, this rod is lighter, longer (6.125 inches)and rated to 1,100 crankshaft horsepower for continuous use. Clearancingof the block on all cylinders due to the longer stroke is necessary atthe bottom of the block and liners. Additional clearancing on connectingrods 1, 5, and 7 is necessary, because the cap screw in the rod wouldtouch the cam where the screw comes through the rod. All materialremoval is done to achieve a minimum of 0.050 clearance and is performedby hand. The MTI 455 H.O. is the only MTI block/liner stroker enginecombination that requires extra clearancing. View Related Article
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