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I bought a stroker crate motor that is designated a 427 cubic inch (351W block w/4.125" bore x 4" stroke). When I do the math it comes to 427.64 cubic inches. Why do some builders say 427 while other motors with similar geometry get designated 428 or 429?
 

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I bought a stroker crate motor that is designated a 427 cubic inch (351W block w/4.125" bore x 4" stroke). When I do the math it comes to 427.64 cubic inches. Why do some builders say 427 while other motors with similar geometry get designated 428 or 429?
Back in the day ford would fudge the actual numbers a little to differentiate between the different engines..427 and 428s are both from the FE family but have vastly different bore and stroke and applications..The 427 was a race motor while the 428 was a great low revving street motor..The 429 is a different engine design altogether..
 

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I'd go with 427. Partially because of what frdnut mentioned about being Fords Race engine for many years and 'cause it sounds cool! :D

It bugs me that they use it on the later model Mustangs (Roush) calling out "427" on the badging when it really means 427 HP, not the cubic inch of the engine. :tdn:

John
 

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I agree..If your engine is actually a 427 no reason not to use a 427 badge...Lots of people build the windsors up to 427 cubes just because it sounds cool..Especially the cobra kit car guys who want a real 427 in their cars..
 

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I had the same concern when I put a 427W into my '69 Cougar. Since that year came with an optional 428 engine, I didn't want to imply I had an original CJ car, so I call it a 427, but the numbers on the valve covers are 7.0L as is an original Ford 7 Litre badge on the trunk.

David


 

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True that. I don't race on the streets for reasons I won't get into, even though I lean on my stuff an a regular basis, so I call it what it is. Might as well. It is what it is. On the other hand, my higher-HP sleeper says nothing. Do what fits you and your purposes.
:tup:
David
 

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thats ok for real street racers ,
the parking lot cars ,all about bragging rights
Ok, well if it is all about appearance and has nothing to do with power that is even simpler.
Buy the 427 badges, stuff a freshly painted stock 351 from the junkyard in there and use the extra $6000-$10,000 on a better paint job and interior.
 

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Ok, well if it is all about appearance and has nothing to do with power that is even simpler.
Buy the 427 badges, stuff a freshly painted stock 351 from the junkyard in there and use the extra $6000-$10,000 on a better paint job and interior.
thats the way to do it , street racer and parking lot show car.... lie
 

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Don't forget that the iconic 427 was actually 425 cubes. The couple stories I've heard as to why Ford choose to call it 427 instead of 425 were that it was one bigger than Chrysler's 426, and that 427 was the largest displacement allowed under the rules. If Ford had no problem calling their 425 a 427, then calling a 427.64 a 427, or 428 shouldn't be a problem either way.
 
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