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Old 11-04-2008, 07:38 PM   #121
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Is that Tim's handy work? Boy has some great AL tig skills.
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Old 11-04-2008, 10:59 PM   #122
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thats gonna make redoing the intercooler piping interesting......if the TB faces up we might not be able to close the hood.
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Old 11-04-2008, 11:03 PM   #123
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Quote:
Originally Posted by disturbedfan121 View Post
thats gonna make redoing the intercooler piping interesting......if the TB faces up we might not be able to close the hood.
That's what I was thinking, look at the flange though and you can tell that the TB would be on the bottom.
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Old 11-04-2008, 11:05 PM   #124
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I love it. Can't wait to see that on a car.
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Old 11-04-2008, 11:38 PM   #125
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The 90deg turn out or that TB makes baby jesus cry...
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Old 11-04-2008, 11:41 PM   #126
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Originally Posted by neogenesis2004 View Post
The 90deg turn out or that TB makes baby jesus cry...
You usually have a 90deg turn immediately before the TB anyway that's being eliminated with this setup so I don't see it being a big deal, not like there's not a 90deg turn into each cylinder too.
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Old 11-04-2008, 11:58 PM   #127
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Any thoughts on creating something that would allow a larger than stock throttle body to be installed? I really hate the 3rd design.
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Old 11-05-2008, 12:25 AM   #128
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Any one of these manifolds will allow for a larger TB to be installed, just modify the flange accordingly.
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Old 11-05-2008, 01:27 AM   #129
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Quote:
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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in regards to this manifold design:
That mani looks like a lot of the big money aftermarket jap manifolds. Here's a DIY (fred's) iteration. Is this both a raised stack and constant radius?
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Old 11-05-2008, 04:43 AM   #130
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i love it. Can't wait to see that on a car.
+1
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Old 11-05-2008, 01:58 PM   #131
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Originally Posted by disturbedfan121 View Post
thats gonna make redoing the intercooler piping interesting......if the TB faces up we might not be able to close the hood.
The TB faces the floor. And yeah, that would mean new IC tubing.
Stephanie
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Old 11-05-2008, 01:59 PM   #132
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Originally Posted by JayMX5 View Post
Any thoughts on creating something that would allow a larger than stock throttle body to be installed? I really hate the 3rd design.
A larger TB could be used on any of them. We just have to enlarge the flange slightly. No big deal. It's ok if you don't like this one. There is going to be 4 total.
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Old 11-05-2008, 02:03 PM   #133
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would be cool to see how mine's coming along
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Old 11-05-2008, 03:45 PM   #134
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Stephanie, how compatible will these be with oem equipment? I know EGR is gone (which is no problem), but what about vacuum lines and PCV?
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Old 11-06-2008, 02:03 AM   #135
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run the pcv to a catch can or just let it blow oil onto the IM lol
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Old 11-06-2008, 11:47 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.

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Old 11-06-2008, 11:55 AM   #137
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Quote:
Originally Posted by Braineack View Post

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.


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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Old 11-06-2008, 03:23 PM   #138
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your final design reminds me of some of the versions made for the sr2d0et. what if you make the tb 2" further out from #1 and not closer?
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Old 11-06-2008, 03:34 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.
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Old 11-06-2008, 03:53 PM   #140
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Quote:
Originally Posted by Braineack View Post
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.
put the ridge in!! and radius the transition between the TB area and plenum.
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