francor94 Posted March 12, 2022 Share Posted March 12, 2022 Hello my name is franco rotunno I’m writing from venezuela in South America. Mack is by far the most popular truck brand here and half of the trucks you see at highway are Mack, olds r600 doing their job just right. Also the Mack engines are the most popular engines and parts to swap as I’ll show a big tractor I get from my grand pa a Cameco 405ag which he swapped a 675 Mack engine. It was my time to rebuild so I put a big turbo looks like hx50 5” intake exhaust. But I want to know or ask what are the difference between 675 and 676 engine what part can I swap between those engines to get more power and if a tip turbo helps me because a front Inter cooler is almost imposible. I’m looking to 350 hp. Because a tractor use a constant 2100 rpm all they long. Quote Link to comment Share on other sites More sharing options...
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