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379HP from a 996.1 Five-Chain | Development Update on One of Our Favorite Platforms

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YOUR RESEARCH379HP from a 996.1 Five-Chain | Development Update on One of Our Favorite Platforms

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POST 1 / ORIGINAL POSTEROriginal post

We wanted to share an exciting milestone from the shop that means a lot to us, especially for those of us who still love the early 996.1 five-chain engines. After a long stretch of testing and refinement, our latest five-chain build put down 379HP / 323TQ on the dyno, using the stock crank and rods . This result represents a big step forward for this platform, which hasn�t seen much modern development in quite a while. The gains came from applying what we�ve learned through our 3-chain and Metzger programs, focusing on efficiency and design improvements rather than chasing peak numbers alone. It�s been a process of experimenting, iterating, and learning and we�re really proud of how it�s come together. For anyone interested in the full rundown and discussion about the build and the path to this result, we just posted a detailed video on YouTube that goes through the project start to finish: Pushing the 5-Chain Limit Time to continue pushing.

POST 4Original post

I’m so pleased Slakker 😎 keep up the great endeavor impressive that keeps on going

POST 5Original post

So what did you do to achieve this ... there is no additional content in the video?

POST 6Original post

Quotes source post: 20301627

Its a capacity increase to 3.9L and headwork. I'd be happy to have 360hp to match the 996.1 GT3, anything extra would just make it even better!

POST 7Original post

Quotes source post: 20301627

24 larger valves , 24 larger head ports, 2 Cams with 12 larger duration/lift lobes, 12 larger intake riser ports, 12 larger intake ports ,13-1 CR.. 85 bigger items = ~1hp per item= ~79 more HP .....

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