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post #5 of (permalink) Old 01-05-2011
SHELBY GT 350 Member
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Originally Posted by Silver J View Post
While we're on the topic: what's the "quick & dirty" way to do a 4.2 stroker? I know you need the rotating assembly from a Ford F150... But pretend you're not trying to build for boost, and simply just want to up the capacity -- what else is needed? Obviously, the computer will need tuned -- any change in injector size? Do the pulleys work -- or which pulley should be used? Thanks!
You need crank, rods, bearings, pistons, and machine shop work in order to build a 4.2 stock motor. Most people seem this to be futile to just add some hp because we all know it is more fun to build for hp. Hp numbers will vary as well as injector sizing because you made no mention of the top half of the motor. I would use somewhere between 21-24# injectors. Pulley/flexplates/flywheels are based on engine balance. You could not use your setup on a 4.2 motor because the balance is wrong.....

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