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Old 06-27-2010, 01:26 PM
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engine stroking question

i have a 65 mustang fastback with a 289 and a toploader 4speed.. recently the motor blew.. i want to build a 347 stroker but im kinda new to ford motors.. does anybody know if i could build a 347 stroker using a 289 block or do i have to get a 302 block.. not sure if theres any differance.. i mean im replacing crank rods and pistons so i dont think it should matter.. i know 351's have higher deck clearance but dont know about 302....any help would be great

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Old 06-27-2010, 04:30 PM
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I am more of a chevy guy but from what I have read on ford engines the 347 stroker is a 302 bored .030 and is a common stroked ford motor. The 289 from reading on google says it can be stroked to a 357 so it can be done but I don't know what all it takes to make it possible. You might want to try a google search and see what you can dig up and hopefully someone like techinspector,fbird88 or some other experienced guy on here can help you out with more info. Sound's like a nice project.
Eric
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Old 06-27-2010, 05:55 PM
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About eight years ago I build a Eagle kit 347 from a 289 block. The block was in a 67 Falcon coupe and the guy wanted matching no.s on the car/ block??? Everything else was aftermkt so I didn't see the point. Customer is always right!!
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Old 06-28-2010, 10:55 AM
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Quote:
Originally Posted by tom penicaro
i have a 65 mustang fastback with a 289 and a toploader 4speed.. recently the motor blew.. i want to build a 347 stroker but im kinda new to ford motors.. does anybody know if i could build a 347 stroker using a 289 block or do i have to get a 302 block.. not sure if theres any differance.. i mean im replacing crank rods and pistons so i dont think it should matter.. i know 351's have higher deck clearance but dont know about 302....any help would be great
Given the choice a 302 makes a better stroker. Ford pulls the cylinder wall a little deeper into the crankcase on the 302 than on the 289. This provides the piston a little better support as the crank transitions thru the TDC motion which reverses the thrust angle on the piston causing it to snap from one side's skirt to the other.

The 289 makes an acceptable stroker but will be a bit harsher on the piston skirt than the 302. A good quality piston should take the thrust switch without a problem, but I wouldn't recommend that you use the cheapest cast piston you can find in the 289 stroker case.

Bogie
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