It's in the Parts Sources Tech Section article (sorry I can't remember the URL off the top of my head).

This looks and must work excelent on a Weber 32/36, the one I currently have. So at the very end, a filter would be in place, outside (opening by grill) for cold air to enter. Seems like a bright idea, but one question, at lower speeds, it might not be that good, because without the speed of air into the long hose, the carb would be actually choked, Am I right?
Probably Weber has a factory made(the picture looks like a Weber 32/36 adaptor)cold air box.
Jaime
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Naw, it wouldn't be choked. You might be thinking of "ram air", but whether the air filter is on top of the carb, or remote the engine is still gonna suck air through it as well as the stock setup ... if you plumb it to the right places, you could additionally get ram air effect. Getting air from the fresh air scoops (base of windshield) is traditionally a high-pressure area.

I saw a similar thing to this on a weber (prob 32/32) on an alfa (i think sud?) at the wreckers this morning, looked to be decent design with air filter inside, just need to extend the air hose running off it

whats the diffrence between an air filter at the front of the car on the end of the hose and one inside the big round bit with a hose running off that?

Right, seems like it will work no matter what speed you go(for ram air, that was my appreciation of the way it worked, so at speed, air will flow faster inside the hose helping out). What if ,like ralliecar says, we install a hose opened to the front of tha car, or the windshield openings (between the wipers?), and at the end, I make a box larger in size than the weber 32/36 filter, equally squared,around the filter, so that the air flow(ram air at speed)... hits the filter faster, and colder, would that be better than having the air filter at the end slowing down the velocity of air at the begining of the hose?
Jaime
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Not much difference normally ... but with this particular adapter here, there isn't much room inside for a filter.

The more surface area the filter has, the better (so say the big-dollar filter companies like K&N). With a remote, you could have a BIG filter wherever it fits, then another hose to the best ram-air location (under bumper? at base of cowl?)

You newer guys may not have seen this one. It looks rough, but probably works as well as an expensive setup:


cold air

a couple of other ideas are visible in the
Which Carburetor? article.

my questtion didnt really get answered, did it?

is this latest picture any worse off than having a tube to a filter up the front?

Sorry, I thought I was answering directly. Let me try again.

Quote:The difference would be significant ... a teeny filter in the TWM adapter (at least, judging by the diagram only a very small filter would fit in there) versus a regular size filter at the front of the car. The latter would be preferable I think.

Quote:It's not worse.

The key is having a filter box big enough to let air flow freely to all sides of the filter, whether the filter box is at the carb, or at the end or middle of the air intake path. And I'm guessing that Angelo's filter box is much bigger than the TWM box. If that's not the case the answer changes. If Angelo used 3" hose, his box is about 3" high. The TWM box looks to be about half that height.

Most new cars seem to have a remote filter. A lot of performance aftermarket filters have no surrounding box at all which takes any worry about airflow around the filter out of question.

the way i see it is like a vacuum cleaner bag, once it starts to clog in one area it starts to suck through another until the entire surface of the bag is blocked, having more area would just make it last longer i would think

but then again the vacuum seems to die in performance the more you use it, until you clean the bag out that is

the one on the alfa actually had quite a large diammeter round filter, though it wasnt very tall (maybe 35mm of paper in height)

I see what you mean. I think you are right, definitely.

Damm if I can find the link but it stated that all downdraft carbies should have at least a 2-3 inch space above it for reverse resonation or backflow balancing when decelerating otherwise you get a choking effect or splattering fuel explosion as often seen on the flat ramflow airfilters for 32/36 which youll find oftern with burnt or melted foam when you pull it out.
Does anyone know or head about this problem. i seemed to have it in a previous escort 2ltr when I changed the factory setup to this flat ramflow filter.
Oh and that the flatness enclosed design of these adaptors often found on vans with little room for a better flowing design eliminates the splattering cause it reduces the flow and air pressure that stops fuel mist spray flowing back out as in the flat aftermarket ramflow filter design.