So I have Weber 44s on my car. When the installation was done by a previous, previous owner, there were some aspects that were less than detail oriented. Items such as the following:
-Fuel Vapor lines from the front (car is a 73) just dump into the engine compartment. Assuming this contributes to fuel smell in car.
-Crank vent is basically a hose with a tiny air filter on it, suspended over the engine case... this leads to oil film all over.
- No head breather ports. Heads were never drilled/tapped for them, but I don't think my venting is adequate and it's causing oil leaks.
- Carbs in general are just loud. I want to hear some throat when I get on it, but don't need it all the time.
So in reading through various threads (especially the ones on the breather setups folks have posted recently) I started thinking about how I could solve all of these problems in 1. Creating a legal setup that would pull the fuel vapors and case/vents into the carb intakes..... and quieting things down a little bit.
So I thought about creating a single airbox that would install over the combined carb setup. Ideally, I would think plastic would be the medium of choice, but I have no clue where I would start.... so then I started thinking about fiberglass. Granted, I've never really built anything with glass, but it's fairly cheap and if it doesn't work I figure I'm only out my time and a few bucks. Plus I learn something in the process. I figure I could use techniques similar to those that the custom speaker box guys use to form shapes and build the box. This would just be thinner.
So I came up with the following crude drawing to illustrate kind of what I'm talking about. I would appreciate thoughts on this concept. Shoot holes in it as you see fit. Been down this road before? Know somebody that tried something similar?
Thanks in advance.... Mike
http://www.ahnendorp.com/ make this exact thing. I've even seen them in carbon fiber with dual air snouts before A set-up like this would quiet down the noise and keep rain out too. What about just using 912 filter assemblies from a set of Solex PII's??
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Here's the stock 912 filter assemblies I was talking about. Probably cheaper and a true Porsche product w/ factory filters. . . Just an idea
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I have thought about this also.
I have looked at the German ones...quite a few are really nice, but very expensive.
The one that got me thinking is attached.
Here are the basic parts that I would use.
CB performance blow through turbo covers for the webers.
Get two.
Super beetle airbox...that is what is pictured (could just be any beetle)
Then get silocone hoses from a boat supply place..
Rich
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I got sick of hearing air going into the throttle bodies - to much noise for nothing. I came up with "Quite Air Induction" I will be selling the system in teh near future. Here is a picture of the proto-type.
Bill Shaffer
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Wow, that looks awesome. I am guessing part of the kit would also be a bellcrank linkage. What's the estimated price on it?
That looks good Bill. Any way to route it to get colder air?
I was thinking of boxing in the vents on either side of the engine lid, making rain hats for the filters, and put drain lines on the boxes.
-Mike
I am using 3" tubing and have found that the Quite Air is somewhat restricted. When I get the production model done I will dyno the car again and state what the difference. The price has not been determined.
Yes it is designed to complement the Sidewinder throttle control. But, I am selling them as separate units.
Bill Shaffer
Not sure, but it's damn cool!
You need only one port on the air cleaner housing for the EVAP. The other hose goes to the fan shroud. There has to be a flow through the system in order for it to work.
The Cap'n
The 912 units don't work. Well, they work 50%.
I purchased a set of 912 air cleaners that fit with the 914 rain tray still on. From 1967 912 I think?
The pass side fit fine using an adapter plate.
The drivers side ran into the firewall by about 3/4 of in inch.
So I pulled them off. My solution was going back to FI.
I'm in the process of making a fiberglass shroud (for lack of a better term) that would connect both of my carbs and have a center section that my air scoop would sit on. It's a slow process with having to make the buck then the mold then the actual piece. The mold is in two pieces that I'll have to join together. I have to do this on each side. The center section is next and finally the scoop which will go up over the targa bar. I should wrap it up in 2012 if I hurry.
I have a box of parts - namely 912 air cleaners, which I have been trying to find the time to work on to my car. I am very slow....
One of these days I'll get it done. the induction is REALLY loud.
Zach
Here is my idea. Just need to lay fiber glass over it. I have already talked with someone about making a mold. But I did not think there would be much interest. If there is I can look into the cost.
^^^ That looks good and is sorta like what I'm doing but mine is using seperate pieces for each carb running into a center section.
I'd be interested. The 912 cleaners are heavy.
BAM, where does the filter go? K&Ns on each side, or a panel filter somewhere?
Zach
Here are some alloy versions, kinda crude with the design ....... and it looks like it will not accommodate a rain gutter.
http://www.chircoestore.com/catalog/product_info.php?products_id=4937
http://www.advancedaircleanersystems.com/airboxes.htm
Checking in to cost right now.
Here is a shot of mine...
One of the problems to overcome is how to attach this thing to the carbs. You need to have some type of base plate on the carbs and you need a tight fit and have a gasket or seal.
Mine is going to have a top and bottom. The bottom will bolt the normal way a filter does. The top will Dzus on with a seal around it. Mine will require the short manifolds and no rain tray. I plan on using a Formula Ford style cone air filter.
I can tell you that a 2" tube to each carb is not enough.
I'd be a buyer of a setup that is quieter and that allows using high quality air filters
that do not decompose and clog up your idle jets!
I have thought along the same lines as you all. I was looking at the turbo covers
for IDFs with the idea of a box in between with a large, paper filter in it.
I'd think you need to use the size of the top lip of your intake stack for calculating
restriction then add something for bends or direction changes the air has to make.
John
Blake... No horse in this race as I'm all sixes but, why not a 911 filter? This way people who mistakenly want to use a K&N could but, those who want better protection could use the factory paper.
Your concept looks excellent... When I first saw it I thought you were going for the factory filter in that plug.
I am basically building this for my race car. Never intended to use it for the street. I will go over to my dads and get the carb housing for his 914-6 and see what it would take to use the air filter from it.
Here are some more dual weber air boxes ..........
http://www.csp-shop.com/cgi-bin/cshop2/front/shop_main.cgi?nocache=1300315615&func=det&rub1=Engine&rub2=Fuel%20System,Air%20Cleaner,Air%20Box%20Systems&artnr=19931a
these have awesome baseplates!!
http://kaefer.motor-sport-service.de/html/luftfilteranlagen1.html
on the samba
http://www.thesamba.com/vw/forum/viewtopic.php?t=191338&postdays=0&postorder=asc&start=0
The 911 air box filter does not have a large enough ID for what I want to do for mine. So I will be continuing with my original plan.
Just for more thought, what about using the original filter holder and making an insert to fit where the filters do out of light guage steel or aluminum. Then run flex hose from each carb to a filter box out of a toyota or simular?
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