New Cast 20B intake manifolds in the works

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Old Mar 4, 2025 | 06:22 PM
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New Cast 20B intake manifolds in the works

Here is the new sideport lower version below. This unit is equal length, shortened by 45mm vs the OEM 20B lower, will be o-ringed at both flanges( not pictured), has an additional injector( 1 per port), no emissions components( for competition use only), and has nicely tapered slightly larger primary runners for increased velocity, and higher flowering secondary ports. This will work with the OEM upper, or our soon to be released upper( similar to our 13B unit). If one is using the OEM 20b upper, you will want to port match the ports. This unit will come with its own proprietary secondary fuel rail, no other units will fit this( we changed the injector location for better atomiziation, and power). Runner transitions and bends have been also improved over factory. We are starting the molds next week on them.

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Old Mar 10, 2025 | 02:57 PM
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I'd buy one. I need a much lowered intake as I want the upper intake piece as close to the top of the engine as possible.
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Old Mar 12, 2025 | 12:00 PM
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Originally Posted by cardmarc
I'd buy one. I need a much lowered intake as I want the upper intake piece as close to the top of the engine as possible.
Height comparison
Height comparison
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Old Mar 13, 2025 | 10:42 AM
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Originally Posted by Turblown
Height comparison
Height comparison
better perhaps if injectors were on outboard side of engine? So how much lower? Expected price?
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Old Mar 14, 2025 | 09:22 AM
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Originally Posted by cardmarc
better perhaps if injectors were on outboard side of engine? So how much lower? Expected price?
Not ideal since the turbo/exhaust system is all over on that side. We aren't changing this model anymore, this is the finished unit. We already started on the mold too.
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Old Mar 14, 2025 | 06:20 PM
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Good let me know when they are available. Last few cars have all been millimeters away from the hood
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Old Apr 1, 2025 | 08:45 AM
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We should have our first samples in 30 more days, and our dyno test car is all ready( fully sorted, tuned and has no bugs).
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Old Apr 1, 2025 | 10:22 AM
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Count me in for one of the first units!
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Old May 21, 2025 | 12:49 PM
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Very exciting to see a new performance cast LIM!!!

A few questions.

Do you have a cross section view of the runners in the cross car plane?
What are the runner taper angles?
What are the runner volumes?
Any chance you have run CFD on the design?

Thank you
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Old May 26, 2025 | 01:58 PM
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Originally Posted by Turblown
We should have our first samples in 30 more days, and our dyno test car is all ready( fully sorted, tuned and has no bugs).
Any updates? Price? Assuming it fits the stock 20B block and not a modified 13B buildup.......
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Old May 27, 2025 | 08:21 PM
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Originally Posted by cardmarc
Any updates? Price? Assuming it fits the stock 20B block and not a modified 13B buildup.......
Machining the sample units this week! ( sideport models).
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Old May 27, 2025 | 08:24 PM
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Originally Posted by ITSWILL
Very exciting to see a new performance cast LIM!!!

A few questions.

Do you have a cross section view of the runners in the cross car plane?
What are the runner taper angles?
What are the runner volumes?
Any chance you have run CFD on the design?

Thank you
The CFD testing in my experience never plays out in real life, there are too many variables that you never have all the correct inputs for. I've had intakes show ideal CFD & flow bench testing completely flop on the dyno.
I have all the above data, but its all proprietary.
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Old May 28, 2025 | 12:25 AM
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Talking big dollars in software licensing for dynamic/transient chamber flow modelling capable software packages to go close to doing justice to dynamic operation.
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Old Jun 2, 2025 | 08:15 PM
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Originally Posted by Turblown
The CFD testing in my experience never plays out in real life, there are too many variables that you never have all the correct inputs for. I've had intakes show ideal CFD & flow bench testing completely flop on the dyno.
I have all the above data, but its all proprietary.
Thanks for the reply. I have experienced useless and useful CFD, it depends on what you are expecting to get from it. I'll cut to the chase, it looks like your runners make a hard 90 at the flange that mates to the irons. Im hoping this is just the way it appears from the outside and it is not indicative of the flow path.

Please dont take this as criticism, this is an expensive intake manifold (rightly so as you need to cover tooling cost with a low volume) and I want convince myself to buy one! So please talk this thing up, tell us how you flowed the ports and they all flowed similary at various velocities or whatever it may be. Not asking for proprietary data, just looking for a little assurance that this is a top notch design.
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Old Jun 25, 2025 | 10:20 AM
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Old Jul 8, 2025 | 08:09 AM
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Our first batch of these will be shipping out this week to customer, we are all sold out. We have started on 100 units ( first production batch), and also just started on the mold work on the semi pport version.
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Old Jul 22, 2025 | 02:16 PM
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Here is the semi pport version we are working on now too.


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Old Oct 24, 2025 | 04:39 PM
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Both lowers will be in stock in a few more weeks, so we are moving on with the UIM. Here is our progress so far, this is still obviously in the works, and will be changing as we go...


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Old Nov 9, 2025 | 10:38 AM
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Some progress over the weekend!

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Old Nov 10, 2025 | 05:03 PM
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Old Nov 17, 2025 | 04:57 PM
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Old Jan 12, 2026 | 09:57 AM
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