427 Coyote?

[Nigel Allen]

I don't know anything about increasing displacement on engines, but I have a question for those that do. Could a Coyote 5.0 be bored / stroked to increase it to a larger size? Possibly even the magical number of 427 cubes? Not something I am interested in doing, but just wondering all the same.

Took a look on the web, but couldn't weed out the BS from the accurate info.

Cheers,
Nigel

[edwardb]

I'm not remotely an expert on the subject either. A Google search says "Not without extensive and expensive modifications." (AI) Kind of expected that. But just a simple comparison of the bore of a Gen 3 Coyote (93mm) to a typical Ford 427 (107.49mm) yields a difference of 14.49mm. Or .57 inches in my world. Not nearly enough room in the block or between cylinders for that much difference. I've watched several articles and videos where they do extensive modifications to the Coyote block boring out the stock sleeves and putting in iron sleeves. But haven't seen where that measurably increases the bore or overall displacement. This article is interesting on that topic and also from the pics made it obvious there isn't any leeway in the block to go much over 5.0 liters. https://www.motortrend.com/how-to/1808-how-and-why-to-sleeve-a-coyote-block/

[Bob Cowan]

I don't know anything about increasing displacement on engines, but I have a question for those that do. Could a Coyote 5.0 be bored / stroked to increase it to a larger size? Possibly even the magical number of 427 cubes? Not something I am interested in doing, but just wondering all the same.

Nigel

No, not enough room on that block for the bore and stroke required.

IMO, that is the biggest mistake Ford made with that engine. The Coyote is a great engine, but 5.2L is max displacement for the block. Compared to the LS blocks, which can go well over 7L.

[edwardb]

No, not enough room on that block for the bore and stroke required.

IMO, that is the biggest mistake Ford made with that engine. The Coyote is a great engine, but 5.2L is max displacement for the block. Compared to the LS blocks, which can go well over 7L.

It's an interesting discussion and reflects strategic decisions made within the two corporations. GM chose to make power with simple tech and more displacement. Ford chose to make power with less displacement, tech and designing the Coyote to be a breathing machine. It's interesting that each generation of the Coyote adds power with improved intake manifolds and heads. Even more breathing. Both respond to power adders and can make incredible additional power.

The 7.4L Ford Godzilla is a more conventional design with added displacement and more similar to traditional GM engines. So far not typically in our builds. But may be interesting since Factory Five has one in their prototype MK5 Roadster.

[Al_C]

Nigel, you raise and interesting question. To Bob’s point, I agree with Paul that it was a strategic decision regarding the design of the engine, rather than an error.
Consider that the coyote is part of the “mod motor” family. If my information is correct, that’s all about manufacturing efficiencies, so it was a financial decision. So a conscious decision is made to build a new, or maybe just evolutionary engine as a continuation of that family, and then they’re able to leverage other investments to enable obtaining the power to compete with GM and Mopar offerings. From a strategic perspective, I think it makes sense, although from an enthusiast’s perspective it doesn’t because we can’t have the magic 427 number. Maybe they’ll bring back the side oiler.