Building A IA II Boosted Engine - Twin-Turbo Tail Twister
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The main caps are steel and the center three have a splayed four-bolt pattern for extra rigidity. ARP studs are used, except for the outboard holes for the splayed caps. Jeff used moly lube on the threads and under the nut/bolt face as well, to insure accurate torque. The rear main gets 120 ft-lbs while the centers receive 100 and the outer bolts get 85. View Related Article
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