Intake Test - Bell Mouth Demo On Flow Bench - How It Works & It's Effect
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- เผยแพร่เมื่อ 21 ต.ค. 2024
- Video Source: • Video
The use of a bell mouth on intakes is widespread. Any throttle body setup will use a bell mouth/velocity stack/trumpet on each individual runner.
What surprised us about this video is the massive effect a bell mouth has on the effectiveness of an intake.
The conclusion of this video is that by adding a bell mouth to an air filter is similar to doubling the size of the air filter.
Or to put it another way, removing the bell mouth from the end of the intake is equivalent to almost halving the size of the air filter.
In short the results of this test are remarkable. We knew bell mouths were effective but we underestimated just how essential they are to the performance of an air filter and the intake system in general.
Street & Circuit, Hellas.
streetandcircui...
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You should test this with velocity stack.
Simple and effective explanation. This is much appreciated!
K&N should watch this video. So many have sharp 90 degree edges. Yes it's a measurable difference, have done so numerous times on Dyno personally.
K&N where you at?...
Help me understand. The shape of the air filter helps the air flow? With the filter removed the air flow is "rough" and doesn't flow as well. Basically you are looking for the lowest vacuum number possible?
Exactly. Lowest vacuum possible at turbo inlet. For NA lowest vacuum possible in the inlet manifold at full throttle. No vacuum = no restriction.
Autospeed has a great article www.autospeed.com/a_0629/page1
Better yet, show the CFM differential at steady vacuum with/without the bell mouth. CFM is something more people can relate to
Great demo !
Here you can see the filter flow effect by VCDS th-cam.com/video/KCk5iqLeieM/w-d-xo.html
more vacuum is better ?
Hi. Directly after the air filter you want the pressure to be as close to atmospheric as possible. Vacuum/negative pressure directly after the air filter is bad
@@DriveTuneMedia Tell it to all turbochargers.
@@Fosgen lower restriction means turbo works less for same mass of air compressed, if your controlling boost to a certain psi, that means lower blade speed to achieve the same pressure level, aka less heat on the compressed side and better turbo life/response/efficiency. It matters.
Intake well
paper or foam filter?
+turbotonic27 HI. The AEM Filter in this test is synthetic fibre. Material is irrelevant to the bell mouth prinicple.
+StreetandCircuit i as asking whats better foam or paper for a 2 stroke engine
as long as the size is correct either is good. paper will be one time use, foam will be cleanable
StreetandCircuit Thanks, i know there are different designs, like horns, round ones, cones, is that for aesthetics or is there a actual benefit from using different shapes of foam filters
@@turbotonic27coan