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Location:
Perth
Registered:
November 2004
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Re: Custom Intake Manifold
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Wed, 17 November 2004 03:39
 
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I'm no expert, but from what I have heard and read, you need to build the runners to the torque characteristics of the engine.
"US based engineering guru David Vizard suggests that a runner length of seven inches at 10,000rpm makes a good starting point. (Note that runner length is the distance from the plenum chamber right to the intake valve seat.)
Add to this another 1.7inches for each 1000rpm less than that which the system is being tuned for. Tuning for peak torque (not peak power) is the norm, so if the engine were being tuned for 4000rpm, a runner length of 17.1 inches (43.6cm) would be required."
-Julian Edgar, 2000 21st Century Performance
I ripped this from this thread which is worth a read....
http://forums.toymods.org.au/index.php?t=msg&t h=30397&rid=8258&S=75b68124fe687e3d107f17d 5fe7df261&pl_view=&start=0#msg_266989
It is not always practical to have huge long runners but if you look at the factory designs, they are not far from it.
As far as flowing well, its not always possible to "see" what flows well, though usually you can get a rough idea on if the manifold is restrictive or not.
I can make you a manifold, I have for a few others, not specifically a 4AG but the principals are the same. If you're not in a huge rush, PM me and we might be able to work something out
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| | Subject | Poster | Date |
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Custom Intake Manifold
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86tt | Tue, 16 November 2004 14:22 |
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Re: Custom Intake Manifold
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gabe | Tue, 16 November 2004 15:29 |
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Re: Custom Intake Manifold
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86tt | Tue, 16 November 2004 15:42 |
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Re: Custom Intake Manifold
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blackjza70r | Wed, 17 November 2004 03:39 |
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Re: Custom Intake Manifold
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86tt | Wed, 17 November 2004 04:09 |
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Re: Custom Intake Manifold
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gabe | Wed, 17 November 2004 04:27 |
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Re: Custom Intake Manifold
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CrUZsida | Wed, 17 November 2004 07:14 |
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Re: Custom Intake Manifold
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86tt | Wed, 17 November 2004 09:52 |
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Re: Custom Intake Manifold
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TE72_Turbo | Wed, 17 November 2004 04:13 |
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Re: Custom Intake Manifold
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86tt | Wed, 17 November 2004 04:20 |
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Re: Custom Intake Manifold
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TE72_Turbo | Wed, 17 November 2004 04:26 |
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Re: Custom Intake Manifold
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86tt | Wed, 17 November 2004 04:36 |
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Re: Custom Intake Manifold
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4ageeza | Wed, 17 November 2004 10:06 |
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Re: Custom Intake Manifold
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86tt | Wed, 17 November 2004 10:15 |
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Re: Custom Intake Manifold
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4ageeza | Wed, 17 November 2004 10:22 |
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Re: Custom Intake Manifold
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86tt | Wed, 17 November 2004 10:44 |
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Re: Custom Intake Manifold
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ke382TG | Wed, 17 November 2004 04:52 |
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Re: Custom Intake Manifold
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86tt | Wed, 17 November 2004 04:56 |
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Re: Custom Intake Manifold
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4ageeza | Wed, 17 November 2004 11:23 |
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Re: Custom Intake Manifold
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86tt | Wed, 17 November 2004 15:12 |
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Re: Custom Intake Manifold
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86tt | Wed, 17 November 2004 15:21 |
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Re: Custom Intake Manifold
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ae86slaver | Wed, 17 November 2004 23:30 |
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Re: Custom Intake Manifold
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86tt | Thu, 18 November 2004 01:34 |
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Re: Custom Intake Manifold
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Joshstix | Thu, 18 November 2004 01:44 |
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Re: Custom Intake Manifold
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4ageeza | Thu, 18 November 2004 02:02 |
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Re: Custom Intake Manifold
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86tt | Thu, 18 November 2004 14:06 |
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Re: Custom Intake Manifold
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4ageeza | Thu, 18 November 2004 14:31 |
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Re: Custom Intake Manifold
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86tt | Fri, 19 November 2004 03:02 |
