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Pre 71 232 steoker??? |
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americanjackie2
AMC Apprentice Joined: Mar/01/2015 Location: wallace id Status: Offline Points: 110 |
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Posted: Oct/21/2018 at 8:58pm |
Okay are there any ideas on stroking a pre 71 232 what have you guys done to squeeze out some performance from a pre 71 232 as far as the bottom end is concerned
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americanjackie2
AMC Apprentice Joined: Mar/01/2015 Location: wallace id Status: Offline Points: 110 |
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Yes I know I spelt stroker wrong
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tyrodtom
AMC Addicted Joined: Sep/14/2007 Location: Virginia Status: Offline Points: 6214 |
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With the right combination of rods, and the right compression height pistons, you can put a 258 crank in a early 232. And put dimples in the oil pan to give the rod bolts clearance.
The deck height on the early and later 6s are different,by about 1/4 inch ?? But it can be done. |
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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.
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americanjackie2
AMC Apprentice Joined: Mar/01/2015 Location: wallace id Status: Offline Points: 110 |
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You know if there's any more in-depth information on how to do it
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amcfool1
AMC Addicted Joined: Jun/18/2011 Location: roanoke va Status: Offline Points: 1075 |
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hi, unless you have a pile of money looking to get away from you, don't bother stroking it. Just do the time tested hotrod 101 system. Cam, carb, exhaust. The 232 is a great motor, and spins up nicely. Treat it to a top of the line rebuild, +.030, crank grind if needed, the best bearings and attention to detail, a good cam. Lots here like the Isky 256, I like the Lunati 262. get an 80s intake/exhaust manifold combo, off of any salvage yard Jeep, or, step up to a 4bbl manifold from Offy, or if you must, Clifford. Use appropriate carb, MC 2150 if 2bbl, Holley 390 if 4bbl, run a good, clean 2" exhaust, and that old 90-110hp 232 will now be making an honest 150-175hp. Got more money, ? stroke it! good luck, gz
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george z
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232jav3sp
AMC Addicted Joined: Jan/09/2013 Location: Texas Status: Offline Points: 2451 |
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Just why is it that you are interested in stroking the 232? you can get a lot more power out of that engine just by installing a later cylinder head. Even the 258 head flows better than what you have. Or, install a 4 liter head from a Jeep. Little 232 performs great with its stock displacement. The only benefit you get from stroking the 232 with a 258 crank is more displacement/more power, and even that isn't going to be enough worth doing. In my opinion anyway.
Something else you have to consider, the later 258 cranks have a different flange then the 232 in your car. Which means that your stock trans will not work with that crank. Even if you were to convert to a stick shift the 258 flywheel would not clear the bellhousing. If I'm not mistaken the later flywheels are larger than the earlier flywheels and therefore do not fit in the smaller bellhousing. |
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americanjackie2
AMC Apprentice Joined: Mar/01/2015 Location: wallace id Status: Offline Points: 110 |
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Yep nope absolutely fair enough that's why I was asking the question to see if it was even viable
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ramblin64sw
AMC Nut Joined: May/31/2012 Location: SoCal Status: Offline Points: 274 |
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That's good enough for me! I don't think it would be that bad. My early 232, has a deck height of 9.285" . With a 3.895 stroke and using the early 232 5.875" rods, leaves you with a piston that needs a compression height of 1.462" . The 305 Chevy piston has a compression height of 1.540" . You would need to trim the piston top .080" , (add a dish to get compression back down) to get to zero deck. You will need the wrist pin bores opened up a few thousand to accomodate the 232 wrist pin. Adapting the early 153 tooth flywheel to the later crank is relatively simple. (I have a 4.0 crank in my early block) The early flywheel registers on the 4.500" O. D. of the crank flange. The late model crank flange is 4.550" . I simply had the 4.500" register in the flywheel opened up to 4.550" . As it so happened, the flywheel's I.D. Bore was already perfectly sized to fit the late model crank 2.685" register "snout". I say go for it. It will run great with that 4.0 head! Jon |
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19689 |
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I'm assuming you want to keep the original trans? 4.0L engines are cheap enough now I'd build a 4.6L stroker, even if you want to keep a carb. Won't cost much more than sticking a 258 crank in the 232 -- maybe about the same since you can now buy off the shelf pistons to use the 4.0L rods and 258 crank (preferred over using 258 crank and rods). You would have to replace the transmission, but if you're building a lot more power you will benefit from upgrading the trans as well.
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Frank Swygert
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amc67rogue
AMC Addicted Joined: Nov/05/2008 Location: Phx. AZ. Status: Offline Points: 1578 |
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IIRC the 71 232 has the same block as the 258. First yr. for the 258 was 71.
Edited by amc67rogue - Oct/22/2018 at 5:39pm |
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Keith Coggins 67Rogue X code
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