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the stock typr 4 parts are very strong and will cope with a lot of power. i know of one stock crank and rods with 105 p&b running 250bhp and only 12 psi, wallys engine is 66x103 and hes running a lot more boost than 14psi with stock crank and rods.
I'm building a stock 1700 type 4 turbo motor and aim to put at least 14 psi into it.
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