Building an inline 6 Chevy 250 engine
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The Chevy 250 head has a "4-port" exhaust. That means two ports are siamesed and two are single port. This design, while fine for a daily driver or truck, leaves a lot to be desired for high performance work. | The Chevy 250 head has a "4-port" exhaust. That means two ports are siamesed and two are single port. This design, while fine for a daily driver or truck, leaves a lot to be desired for high performance work. | ||
| − | So it comes as no surprise that improving the exhaust flow will help power. A big improvement to the Chevy inline 250 cylinder head is to install an exhaust port "lump". For years, these was a one-off, hand made piece that was quite a chore to fabricate and mount. Some were better than others, and some were worse than nothing. Nowadays, [http://t6racing.org/index.html T6 Racing] has designed a lump kit and can supply all the necessary tools and info to install it. It is | + | So it comes as no surprise that improving the exhaust flow will help power. A big improvement to the Chevy inline 250 cylinder head is to install an exhaust port "lump". For years, these was a one-off, hand made piece that was quite a chore to fabricate and mount. Some were better than others, and some were worse than nothing. Nowadays, [http://t6racing.org/index.html T6 Racing] has designed a lump kit and can supply all the necessary tools and info to install it. It is cast and machined pieces of iron that fit into the exhaust port floors to vastly improve flow. |
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