Page 5 of Lunati Crankshafts by Holley Performance Products, Inc.

cams nascar ® rule series lunati engineers designed the nascar series cranks to make it easy to buy a crank for the stock series requiring crank weights in the 50 lb range the cranks come rough or finished balanced to your bob weight see chart below these crankshafts have the rear of the counterweight squared all rod journals are drilled and the counterweight heights will accommodate a 5.700 rl they are designed for quick acceleration with superior oil control and are currently available in 3.480 stroke and 2.100 rod journal with 350 mains part number af112an stroke 3.480 main size 2pc-2.448 pin size 2.100 minimum rod length 5.700 bobweight range 1351-1750 average weight 52-54 valve train hooters ® cup series lunati engineers designed this crankshaft series specifically the hooters cup series the stroke is 3.480 with 2.000 rod journals and 350 mains the leading edge of the crank is bull-nosed and the trailing edge of the counterweights are squared the counterweights will clear a 5.7000 rl all four rod journals are lightened for fast acceleration this crank comes rough or finished balanced see chart below this crank meets the 50 lb rule you will receive great performance and durability with this crank part number af143an stroke 3.480 main size 2pc-2.448 pin size 2.000 minimum rod length 5.700 bobweight range 1351-1750 average weight 50-52 pistons rods pro blowertm series cranks this series is designed to withstand the extreme pressures encountered when using a roots type supercharger commonly referred to as a blower lunati blower crankshafts have .140 radii on the rods and mains they also have dual keyways 3/416 threads in the nose and the flange is drilled to either 1/2 or 7/16 there are 7/8 lightening holes in the 2 3 and 4 rod journals the #1 rod journal is not drilled to provide extra strength on the front of the crankshaft rod and main bearing must be chamfered on all blower series crankshafts engine kits big block chevrolet v8 part number bo429in bu429in bp429in bq429kn stroke 4.000 4.125 4.250 4.500 main size 2pc-2.750 2pc-2.750 2pc-2.750 2pc-2.750 pin size 2.200 2.200 2.200 2.200 minimum rod length 6.385 6.385 6.385 6.535 apparel note must use chamfered bearings tech line 662-892-1500 279

[close]