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Q: How do you increase horsepower on E7 Mack?
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Need pic of mack truck with a 427 in it?

An image search for "Mack CH600" or "Mack CH613" should do the trick. Most line haul CH series trucks had the E7 engine, normally rated at either 427 or 460 horsepower. Those will have a decal on the lower part of the door which will say "E7 427", "E7 454", or "E7 460" - those with engines with lower ratings do not have this. Also, if you look on the Wikipedia page for Mack trucks, there's a photo of a green Mack RD688 quad axle dump truck, with the company logo, truck number, and license plate blacked out. I can tell you firsthand that truck has the 427 E7 in it, Eaton-Fuller 8LL transmission, and Mack axles with 4.17 rear end gears.


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How much horsepower does a mack vision 460 have can if be over the road truck?

The "460" indicated it has an E-series motor rated at 460 horsepower. Some of the horsepower options changed with the 2007 emissions regulations, but traditional Mack options were 460 horsepower, 427 horsepower (these would both have that number on the side) 400/405 horsepower, 380 horsepower, and 350 horsepower. For a while, there was a 500 horsepower V8 motor offered, but it was only available for a couple years before being discontinued. And there was a 485 horsepower motor offered, and I believe it is still available, but cannot say 100% for certain. Most OTR Mack trucks will have the 400, 427, or 460 E7 motor, although there are some OTR tractors which have the 350 - St. Germain Transport out of Quebec operated CH-613 tractors in their fleet which have the E-Tech 350 motor, and 4:11 rear ends.


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Add a turbocharger.