Pushing some new intake manifolds to the limit!
Dec 26, 2007, 06:44 AM
#272
The JUN intake features design attributes that are important to a good manifold. The photos plainly illustrate this.
The runner orifices are raised off the floor, which provides a greater angle of entry in which air can be drawn into the runner.
The plenum near the TB exit is nearly the same diameter as the TB. This minimizes turbulence between the transition from TB to plenum. Turbulence causes uneven air/fuel metering between cylinders and reduces power and reliability.
The gradual taper toward the end opposite the TB reduces turbulence and stabilizes air pressure.
If only someone would make a good, affordable copy . . .
The runner orifices are raised off the floor, which provides a greater angle of entry in which air can be drawn into the runner.
The plenum near the TB exit is nearly the same diameter as the TB. This minimizes turbulence between the transition from TB to plenum. Turbulence causes uneven air/fuel metering between cylinders and reduces power and reliability.
The gradual taper toward the end opposite the TB reduces turbulence and stabilizes air pressure.
If only someone would make a good, affordable copy . . .
Dec 26, 2007, 09:56 AM
#276
Evolved Member
No need to worry. Was just a little bored after Christmas. You know I have an interest on intake manifold designs. Not to mention I've always been impressed by the Jun intake on other platforms.
Last edited by crispeed; Dec 31, 2007 at 08:01 PM.
Dec 31, 2007, 03:53 PM
#278
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Join Date: Sep 2007
Location: Chicago, IL
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Dec 31, 2007, 08:07 PM
#280
Evolved Member
