Thoro-Tec air intake, Has anyone tried this intake system |
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Thoro-Tec air intake, Has anyone tried this intake system |
914-300Hemi |
Oct 22 2020, 07:17 PM
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#1
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Senior Member Group: Members Posts: 1,356 Joined: 7-September 06 From: San Dimas, CA Member No.: 6,794 Region Association: Southern California |
I found this air intake system for Weber carbs from Thoro-Tec Thoro-Ted web site
They also have other 914 related items. |
Superhawk996 |
Oct 23 2020, 06:30 AM
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#2
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914 Guru Group: Members Posts: 5,892 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
"Looks" nice from an elegant visual design standpoint but I'm wondering how it flows and whether or not it accomodates velocity stacks.
It looks constricted to me forcing a 90 degree airflow change and potential for turbulence just before the venturi. However, I've seen CFD on other designs that I thought didn't look optimal and they performed well both in CFD and later on during validation testing. This is the sort of stuff that I think the company needs to provide CFD and/or dyno proof before I'd shell out $1000 for what is esentially a pretty air filter. |
Mikey914 |
Oct 23 2020, 06:32 AM
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#3
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The rubber man Group: Members Posts: 12,678 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
I'd be interested in flow specs.
Looks better for forced induction. |
bdstone914 |
Oct 23 2020, 07:28 AM
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#4
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bdstone914 Group: Members Posts: 4,536 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Agree with the above comments. Look like far less filter surface area. In addition to the flow specs what are the filtration properties?
I guess one benefit would be less likely to catch fire if the car backfires. |
Superhawk996 |
Oct 23 2020, 07:36 AM
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#5
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914 Guru Group: Members Posts: 5,892 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
. . . what are the filtration properties? Does it matter? Filter is red. Surely adds 15 HP. (IMG:style_emoticons/default/laugh.gif) |
JmuRiz |
Oct 23 2020, 08:43 AM
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#6
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914 Guru Group: Members Posts: 5,434 Joined: 30-December 02 From: NoVA Member No.: 50 Region Association: MidAtlantic Region |
Would be better with an MSDS filter. I like the clean look.
As much as I like the filter hats on a /6 engine I'll probably run the modified stock airbox i got from Britain Smith. |
gereed75 |
Oct 23 2020, 09:06 AM
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#7
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Senior Member Group: Members Posts: 1,259 Joined: 19-March 13 From: Pittsburgh PA Member No.: 15,674 Region Association: North East States |
They also have three rain hat type covers
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Mark Henry |
Oct 23 2020, 10:02 AM
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#8
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Not enough volume.
It needs something like a /4 version of a /6 intake, large central plenum, large runners and as much height over the velocity stacks as possible. M96 has two 4"(-ish) tubes but they're attached to two large plenums, total volume of several liters. |
73-914 |
Oct 23 2020, 10:14 AM
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#9
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Senior Member Group: Members Posts: 579 Joined: 24-April 10 From: Albany UpstateNY Member No.: 11,651 Region Association: None |
overpriced "Dreck"
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SirAndy |
Oct 23 2020, 10:50 AM
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#10
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Resident German Group: Admin Posts: 41,676 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
"Looks" nice from an elegant visual design standpoint but I'm wondering how it flows and whether or not it accomodates velocity stacks. @Superhawk996 Wouldn't the long runners double as velocity stacks? Seems like they should ... (IMG:style_emoticons/default/idea.gif) |
Superhawk996 |
Oct 23 2020, 11:04 AM
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#11
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914 Guru Group: Members Posts: 5,892 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
"Looks" nice from an elegant visual design standpoint but I'm wondering how it flows and whether or not it accomodates velocity stacks. @Superhawk996 Wouldn't the long runners double as velocity stacks? Seems like they should ... (IMG:style_emoticons/default/idea.gif) @SirAndy I think you are right they might serve to boost flow velocity initially but then that 90 degree turn without much height above the venturi would mess it up as it then decelerates flow into the tiny "plenum" over the 2 barrels of the carb. Velocity stacks might help restablish a linear flow down into the venturi but those little plenums above each carb would seem to constrict flow downward into a velocity stack for each venturi. All purely speculation on my part. At a bare minimum I'd want to see a dyno plot that shows HP is at least equal to standard IDF style filters. I really do like how clean it looks. Just not convinced it won't cost HP. |
douglastic |
Oct 23 2020, 11:09 AM
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#12
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not a real person Group: Members Posts: 58 Joined: 7-November 16 From: Beaumont, CA Member No.: 20,566 Region Association: Southwest Region |
Looking at it makes me feel like I'm breathing through a straw.
(IMG:style_emoticons/default/icon8.gif) |
JamesM |
Oct 23 2020, 11:36 AM
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#13
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Senior Member Group: Members Posts: 1,915 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
I'd be interested in flow specs. Looks better for forced induction. (IMG:style_emoticons/default/agree.gif) Was wondering what the advantage of this setup is given the air filter is still exposed to the elements. It looks very similar to the various CB performance setups for forced induction. https://www.cbperformance.com/product-p/7312t.htm If doing non forced induction and want to join both stacks to a single air filter, i think this is the better way to go as it actually protects from the rain. https://www.ahnendorp.com/VW-Type-4---Porsc...tml?language=en |
914_teener |
Oct 23 2020, 11:46 AM
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#14
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914 Guru Group: Members Posts: 5,205 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
I'd be interested in flow specs. Looks better for forced induction. (IMG:style_emoticons/default/agree.gif) Was wondering what the advantage of this setup is given the air filter is still exposed to the elements. It looks very similar to the various CB performance setups for forced induction. https://www.cbperformance.com/product-p/7312t.htm If doing non forced induction and want to join both stacks to a single air filter, i think this is the better way to go as it actually protects from the rain. https://www.ahnendorp.com/VW-Type-4---Porsc...tml?language=en People drive a 914 in the rain? Fluid mechanics sometimes has surprising results. I can't imagine anybody making something like this without modeling it. My quess is that is is quieter more than anything else. |
AZBanks |
Oct 23 2020, 12:03 PM
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#15
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Senior Member Group: Members Posts: 1,063 Joined: 7-December 05 From: New River, AZ Member No.: 5,245 Region Association: Southwest Region |
Adding oil just got a little more time consuming.
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Superhawk996 |
Oct 23 2020, 01:21 PM
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#16
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914 Guru Group: Members Posts: 5,892 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
I can't imagine anybody making something like this without modeling it. (IMG:style_emoticons/default/av-943.gif) I can. Happens all the time. Sort of looks like they might be 3D printed as an on demand business model. Can't imagine them selling more than 1 or 2 at that price point. 914/4 owners not exactly known for rollling in cash and spending big $ on parts. (IMG:style_emoticons/default/happy11.gif) Long ago I had a conversation over beer with a buddy. We discussed going into the aftermarket business, making "hop-up" parts, and how we might market them based on what goes on in the industry. We both eventually arrived at the postion that unless we were going to be willing to make absurd claims about added horsepower, improved fuel economy, etc., we might be giving up lots of money to those that do. We both decided to focus on our day jobs. My hat goes off to the suppliers we have supporting this community and providing honest products and standing behind them. (IMG:style_emoticons/default/smilie_pokal.gif) It ain't easy! |
jd74914 |
Oct 23 2020, 01:27 PM
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#17
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Its alive Group: Members Posts: 4,782 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
Fluid mechanics sometimes has surprising results. I can't imagine anybody making something like this without modeling it. My quess is that is is quieter more than anything else. True...but usually aftermarket stuff like this isn't modeled well. Most really falls in the ColorfulFluidDynamics realm where people assume presentation==validity. Generally intake simulations kinda suck to do by their cyclic nature and aren't really for the faint of heart. That said, it does look really nicely made! I am curious to know what the base at the carb looks like. Seems like their might be enough room for a nice partial bellmouth which would be OK. I'd agree with that, you're damping a lot of the noise of the butterflies which can be nice. |
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