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post #1 of 4 (permalink) Old 08-15-13, 11:15 AM Thread Starter
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HSC 2.3, 2.5 Four Related to 3.3 Six?

Is it true that the HSC 2.3 and 2.5 inline fours were in any way related to the old 3.3 "Thrift-Power" (or "Falcon") inline six?

So far, such a reference is only found on Wikipedia, a site that "anyone can edit." I would think its accuracy about the HSC four's relation to the Falcon six is disputed; I had thus edited that page to indicate that the information, as currently typed, is dubious and the entry therefore disputed.
Ford HSC engine - Wikipedia, the free encyclopedia (main)
Talk:Ford HSC engine - Wikipedia, the free encyclopedia (talk)

Thank you,



Ben

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post #2 of 4 (permalink) Old 08-15-13, 06:20 PM
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Re: HSC 2.3, 2.5 Four Related to 3.3 Six?

I've got nothing that can support or disclaim it. Came up with the same Wiki stuff. Did find some interesting articles on the V-8 history, though.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #3 of 4 (permalink) Old 08-15-13, 06:35 PM Thread Starter
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Re: HSC 2.3, 2.5 Four Related to 3.3 Six?

The theory that the 2.3L and 2.5L "HSC" four-cylinders were based off of the 3.3L six was arrived at because since the plant that made the 3.3L no longer had any such engines (supplies were exhausted in 1983), they needed to make another engine and did not have the kind of money to create an entirely-new-from-scratch four-cylinder engine, so, basically, they based the HSC fours (though not entirely) around the discontinued six, by taking off two cylinders.

What is true about the 2.3L HSC four, though, is that it is NOT related to the older 2.3L Lima (OHC) four which saw use in such cars as the Pinto/Bobcat, the (imported) Capri, the Mustang II and these Fox-chassis cars: Fairmont/Zephyr, Mustang/Capri, Granada/Cougar, LTD/Marquis and the '83 design Thunderbird/Cougar. The HSC is all pushrods.

The myth that the 3.3L Falcon six pistons interchange into the 2.3 and 2.5 HSC/HSO engines is apparently debunked, according to this link:
http://www.tempotopaz.com/main/index...ewtopic&t=7954

~Ben
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post #4 of 4 (permalink) Old 08-23-14, 08:50 PM Thread Starter
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Re: HSC 2.3, 2.5 Four Related to 3.3 Six?

BUMP

The "Lima" 2.3L four-cylinder had a 3.781" bore and 3.125" stroke whereas the HSC 2.3L had a 3.682" bore and 3.294" stroke.

When supplies of the 3.3L six were exhausted during 1983, the plant where these engines were produced needed an idea to keep production going. Basically, after removing the fourth and fifth cylinders, while retaining the 3.682" (93.5 mm) bore of the 3.3L, they did increase the piston stroke length to 3.294" (83.7 mm) to achieve 2.3L.

So, while the two 2.3s may be similar in terms of displacement, it should be known the Lima engine is a SOHC unit while the HSC 2.3L (and 2.5L) is OHV.

~Ben
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