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Old 08-22-2008, 11:59 AM
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Are these forged parts?

This engine looks to have been rebuilt in the 80's. It looks to have Scat rods and possibly a Scat crank. No names on the pistions, but my Ford rebuild book says if the "front" arrow is engraved, they are probably forged as cast would have just a notch. The rods look like regular rods, but they have a locating pin in the raod cap. They also have small rod bolts.

Also, I've heard you can tell be the cast seam if a part is forged or cast. Thick vs thin, but I can't remember which.

Did I stumble onto a heavy duty bottom end?



















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Old 08-22-2008, 12:03 PM
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If the seam is wide its forged and thin its cast
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Old 08-22-2008, 12:25 PM
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The pistons are forged, but the rods and crank are Ford parts.
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Old 08-22-2008, 01:36 PM
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Quote:
Originally Posted by Arrowhead
This engine looks to have been rebuilt in the 80's. It looks to have Scat rods and possibly a Scat crank. No names on the pistions, but my Ford rebuild book says if the "front" arrow is engraved, they are probably forged as cast would have just a notch. The rods look like regular rods, but they have a locating pin in the raod cap. They also have small rod bolts.

Also, I've heard you can tell be the cast seam if a part is forged or cast. Thick vs thin, but I can't remember which.

Did I stumble onto a heavy duty bottom end?


















These are Ford production parts with Sealed Power forged pistons.

Bogie
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Old 08-22-2008, 03:06 PM
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OK, thanks for clearing that up. The "Scat" oval logo is very simialr to the "Ford" oval logo. I did suspect those were Ford part numbers though. Wishfull thinking I guess.
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Old 08-22-2008, 03:16 PM
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Quote:
Originally Posted by Arrowhead
OK, thanks for clearing that up. The "Scat" oval logo is very simialr to the "Ford" oval logo. I did suspect those were Ford part numbers though. Wishfull thinking I guess.
I wouldn't knock it, that bottom end looks to be clean and unworn in the pictures. Is it in reality? If so; that could be a real nice foundation for an SBF build.

Bogie
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Old 08-22-2008, 05:19 PM
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I guess the other thing that thew me was the dowel pins in the connecting rod caps. I talked to Summit and they said they are only be used in a high RPM racing applications. But if that was the use, then why OEM rods? Is that a factory Ford part? Maybe they were machined and added later? Mt point is is your were going to build a motor that needs the dowel pins, why not use a heavy duty aftermarket rod.

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Old 08-22-2008, 06:13 PM
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Cost most likely. Back in the 80's a set of aftermarket rods was nowhere near as cheap as they are today, and for a SBF probably weren't as many options either.
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Old 08-22-2008, 07:39 PM
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Quote:
Originally Posted by Arrowhead
I guess the other thing that thew me was the dowel pins in the connecting rod caps. I talked to Summit and they said they are only be used in a high RPM racing applications. But if that was the use, then why OEM rods? Is that a factory Ford part? Maybe they were machined and added later? Mt point is is your were going to build a motor that needs the dowel pins, why not use a heavy duty aftermarket rod.

Beats me; one would think that a complete build for a high winding, high power motor would include 4 bolt mains or a stud girdle that isn't there.

Bogie
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