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Three plenum tops, from left to right Rover twin throttle
plenum, carbon fibre plenum and Westfield modified plenum The twin
throttle is actually wider than standard.. |
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The three different plenum bases in the same order. |
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This picture clearly illustrates the different trumpet
heights. |
A brief analysis of the different inlets. Two figures for the Westfield
plenum height are for in front and behind the splitter.
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Twin Throttle |
Carbon Fibre |
Westfield |
| Trumpet height |
52 |
30 |
20 |
| Plenum height |
90 |
90 |
90 / 55 |
| Trumpet diameter |
42 |
45 |
38 |
| Diameter/gap ratio |
0.9 |
1.35 |
1.85 / 0.92 |
Notes - All dimensions in mm and approximate. The trumpet height is how far
the trumpet extends into the plenum top. Optimum diameter/gap is supposed to be
around 1 - 1.5. Measurements for center of plenum and central trumpets |
