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Old 02-11-2013, 10:12 AM
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Possibly buying a 460 ford just have one question

Can you put an internally balanced rotating assembly in 460 that was originally an externally balanced rotating assembly motor?

Thanks in advance
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Old 02-11-2013, 10:57 AM
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Or any other Ford motor before 96 for that matter?
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Old 02-12-2013, 07:29 AM
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Quote:
Originally Posted by jb6xb View Post
Can you put an internally balanced rotating assembly in 460 that was originally an externally balanced rotating assembly motor?

Thanks in advance
A D9TE block originally intended for external balance will require minor clearancing when used with an original internally balanced rotating assembly.
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Old 02-12-2013, 08:12 AM
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Where would this clearancing be at, I am assuming near/at the flexplate/flywheel where it would have been externally balanced?
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Old 02-12-2013, 08:56 AM
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I'm not real familiar with the specifics of this one, but I believe the clearancing would be for the crankshaft counterweights internally on the block.

Matt
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Old 02-12-2013, 09:36 AM
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IMO, seems they should be able to just drill and fill with heavy metal, with no additional clearancing required, but I'm not a Ford guy...what would additional clearance be needed for?
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Old 02-12-2013, 10:01 AM
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Anything is possible but why would one want to do this unless you are building an all out race motor? Those engines work just fine the way henry built them and going to an internal balance does not make a whole lot of sense unless one is building some kind of all out race motor..

Sam
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Old 02-12-2013, 10:22 AM
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Anything is possible but why would one want to do this unless you are building an all out race motor? Those engines work just fine the way henry built them and going to an internal balance does not make a whole lot of sense unless one is building some kind of all out race motor..

Sam
I'm pretty sure henry was dead.

And I completely agree. Most of what I own is GM, but I've driven and worked on lots of 460s. Great engines.

Matt
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Old 02-12-2013, 10:26 AM
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I would be stroking to a 502 at the very least, and any of the kits I would buy are internally balanced, I just want to know what I am getting myself into before I dive right in, it would be in a pulling/mud truck, so I would be looking for roughly 500+ when I am done, with the possibility of boosting it

Thank you so far with your information
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Old 02-12-2013, 11:37 AM
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The cylinder bores of the later blocks are longer than in the early blocks and the crank throws are larger on the early cranks. Hence the need to clearance when using an early crank in a late block. The longer cylinders of the later blocks are often preferred for stroker builds when using a 4.3 stroke crank or bigger because they offer more support for the piston at the bottom of the stroke.

http://www.highflowdynamics.net

Also, there is an oil slinger/deflector on the early cranks which is not compatible with the later blocks and needs to be ground down.

Externally balanced 4.14 cranks are readily available and as has been stated are fine for anything outside an all out race build. You can also offset grind a factory 460 crank to a 4.14 stroke. Externally balanced cranks are easier (cheaper) to balance as well.
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Old 02-12-2013, 04:12 PM
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Scat Engine Rotating Assemblies 1-47602BI - SummitRacing.com

That is a link to the specific kit I would like to buy, that is what I decided on for my stroker kit, unless anyone here has a different kit and can explain why it would be better, but it says that it fits 72-97 Ford 385 Series Big Block 460s
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Old 02-12-2013, 04:45 PM
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I don't know what your heads are (cc's) but doubt you'll make 500 hp and still have a low enough c.r. to boost later on. Making 500 hp with an 8:1 or lower c.r. or less will be a challenge.
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Old 02-12-2013, 05:34 PM
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I havent decided on all of the components yet, still trying to get the right truck and motor right now, but getting 500 should not be hard out a big block like this
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Old 02-12-2013, 07:47 PM
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You can't go very large with internal balance in a 460. I think 501/502 are as big as you can go with internal balance. I don't think the 4.3" stroke cranks are available in internal balance. Unless your going for a manual transmission, external balance would get you the most bang for your $$, because you can get nearly 600 CID for the same price as 500 CID.. Reason for internal balance better for M/T is because a 390 flywheel will work with a 351M/400 4spd bellhousing which can be had cheap, but will not clearance external balance flywheels. You would need that illusive 460/4spd bell from an 80's F-350 that came with a T-19 or an aftermarket bell. Either one isn't cheap

CarsByCarl.com has better prices than Summit, and you can actually message and talk to Carl on 460 Ford Forum if you need to plan out a good build.
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Old 02-13-2013, 07:05 AM
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I ran into the long cylinder/crank problem on a Ford 350 series box truck (18ft box) I have.
Someone ran the original engine out of oil and welded the lower end together. The fresh core engine block required quite a bit of grinding to fit the stock replacement rotating assembly into.
I was really surprised when I set the crank into the block. Tried to rotate the crank and "clunk".
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