Editing Hotrodding the BBC 454 engine

==Intro== ==Specific tips== Replace peanut port heads on dish piston truck engines with oval port closed chamber heads for a quick and relatively cheap power increase. Really? What if they want more power below 3000 RPM? Then the larger intake ports are the wrong move entirely. In fact, peanut-ports with good valves but no porting, on a domed-piston 9.5:1 454, will do 446 HP with a street-friendly cam, headers and a decent intake. Peanut-ports on a 454 will typically give peak HP at 4900 RPM, with cams from 212 to 228 degrees, at 0.050", of intake duration. Swapping to the large-oval (intake port) heads will help by 3000 RPM. Most of the '70s, '80s and early '90s pickups had around 7.9:1 compression with flat-top pistons and large "open" combustion chambers. None of the "closed" -chamber heads had hardened exhaust seats needed for unleaded gasoline, and these heads are coveted, plus the production numbers were far less than the peanut ports. Since you're probably stuck with peanut ports, you can have a lot o fun with them if you build for them, and aren't after a big HP number. ==Suppliers== ==References== [[Category:Engine]] [[Category:Undeveloped articles]]

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