Begi Intake Manifold
11-05-2008, 12:27 AM
#129
The only thing I really found suggesting a raised velocity stack was when the stack inlet radius was toroidal (meaning, not a constant radius). For a constant radius inlet, the stack was suggested to be flush against the floor.
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11-05-2008, 12:59 PM
#132
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Stephanie
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11-06-2008, 10:47 AM
#136
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I was playing some more.
I really like the idea of a tapered IM. With what I'm finding, it's providing the best flow into #4. A little too good in this certain case:
I removed the stacks...seems like they really helped create a larger area to pull airflow from. With the stacks back in place I got flow back into #1.
so then I thought, why not move the TB inlet back 2" inches to see what difference it had...in the same conditions it flow like the first one...it's almost like the stack of #1 needs to be right at the inlet to work.
so at this point I thought angling the TB would be the best to retain that lost flow but as to not disturb the airflow to the rear of the manifold. Which seemed to help.
I was really starting to like this shape, so I went crazy with teh inlet and did the common "teardrop" shape and saw pretty good results.
I really like the idea of a tapered IM. With what I'm finding, it's providing the best flow into #4. A little too good in this certain case:
I removed the stacks...seems like they really helped create a larger area to pull airflow from. With the stacks back in place I got flow back into #1.
so then I thought, why not move the TB inlet back 2" inches to see what difference it had...in the same conditions it flow like the first one...it's almost like the stack of #1 needs to be right at the inlet to work.
so at this point I thought angling the TB would be the best to retain that lost flow but as to not disturb the airflow to the rear of the manifold. Which seemed to help.
I was really starting to like this shape, so I went crazy with teh inlet and did the common "teardrop" shape and saw pretty good results.
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11-06-2008, 10:55 AM
#137
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scott, humor me here. use this model and add a tiny ridge around the inside edge of the inlet tube about half way in. like a pipe bead but on the inside. maybe .06 high. then re-do this simulation.
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11-06-2008, 02:34 PM
#139
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You can see I tried that between images 2 and 3.
The differences between all the above are
1. no stacks.
2. stacks
3. 1.3" added between wall and stacks
4. 14° angle on inlet.
5. crazy angled inlet and teardrop taper.
I mean hell knows if I'm setting up these pressure boundaries correctly, but it's pretty obvious which variation flows evenly the best. This has me thinking about something, going to try a different inlet variant.
The differences between all the above are
1. no stacks.
2. stacks
3. 1.3" added between wall and stacks
4. 14° angle on inlet.
5. crazy angled inlet and teardrop taper.
I mean hell knows if I'm setting up these pressure boundaries correctly, but it's pretty obvious which variation flows evenly the best. This has me thinking about something, going to try a different inlet variant.
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11-06-2008, 02:53 PM
#140
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
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You can see I tried that between images 2 and 3.
The differences between all the above are
1. no stacks.
2. stacks
3. 1.3" added between wall and stacks
4. 14° angle on inlet.
5. crazy angled inlet and teardrop taper.
I mean hell knows if I'm setting up these pressure boundaries correctly, but it's pretty obvious which variation flows evenly the best. This has me thinking about something, going to try a different inlet variant.
The differences between all the above are
1. no stacks.
2. stacks
3. 1.3" added between wall and stacks
4. 14° angle on inlet.
5. crazy angled inlet and teardrop taper.
I mean hell knows if I'm setting up these pressure boundaries correctly, but it's pretty obvious which variation flows evenly the best. This has me thinking about something, going to try a different inlet variant.
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