Header sizing 914-6 |
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Header sizing 914-6 |
mb911 |
Dec 27 2015, 02:21 PM
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#1
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914 Guru Group: Members Posts: 6,854 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
So while my 914-6 oil tanks are being machined I going to start working through my header with heat exhanger design out of stainless.. I do not have non compete on these with m&k so that gives me design freedom.. However I will use similar design process as the m&k/ rarlyl8 design. So my question is 1.5" the most common size or allot of you using 1.625
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wndsnd |
Dec 28 2015, 05:27 PM
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#2
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You wanted a horse, but got a goat. Nobody wants a goat.... Group: Members Posts: 2,861 Joined: 12-February 12 From: North Shore, MA Member No.: 14,124 Region Association: North East States |
Is there an accepted ratio between exhaust port size, and header pipe size?
Looking at the chart posted above the 1 5/8 pipe is used for 2.0 to 3.2 head sizes, yet the port sizes vary considerably. 1 5/8 is 41.275 mm. Exhaust ports run from 32 mm to 38 mm for those engine sizes. I have heard if you oversize, you can kill performance but obviously some oversizing is prefered. What is considered optimal? |
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