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 and can supply all the necessary tools and info to install it. It is a cast and machined piece of iron that fits into the exhaust port floor to vastly improve flow. | + | 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 a cast and machined piece of iron that fits into the exhaust port floor to vastly improve flow. |
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