best airbox/filter set up?

[67GTV]

Quote:

Originally posted by turbolarespider If you went through and actually calculated the filter area on a stock set up (the log style filter) and compare it to any of those above systems, including the above K&N, I think you'll find the stock one has far more area.

[BigSwede]

Foam is absolute crap. I knox I have foam on my Alfetta but it's not currently a priority.

The area compared to a paper filter is absolute sheit. K&N is bettar but still is a big drop in area compared to paper original...
I have a K&N panel filter in original box om my 75 T and the filter area is MUCH smaller then a stock paper filter.
This winter I'll make a custom box and fit a large paper filter in it, should be the best solution me thinks... Maybe I'll make it in carbon fiber, light and strong.

[papajam]

Quote:

Originally posted by magista What exactly do you mean by the "center tube"?

[Tito]

As usual Papajam hit the nail on the head. I am going to drill more holes into the center tube and Im sure that will be the best bet. Does K&N make a usable filter for the airbox?

[djone101]

I got a foam ITG filter element for the standard airbox, they didn't list it but made it up from the dimensions of the standard paper filter. Cost me about £30. This was after several months of trying to locate a K&N part which aparently is now obsolete.

My contact at ITG was Stuart Fedden (stuart@itgairfilters.com) - this was April last year.

I haven't drilled more holes in the centre tube but will do for the 2l engine I'm rebuilding.

you can tell I've got to much spare time, checking out each subject on the forum, but I wanted to add my 2cents on this, I recently removed the sprint cast air horn filter setup and replaced it with a Euro airbox that I had gotten for a GTV project that fell thru, had to cut off the air horn at the front end of the cannister and add a flex hose to connect it to the horn next to the radiator thats in all spiders that were Spica equipped. Took a 3 day drive thru the mts of West Virgina and Virgina, the car had lost some mid range guts and would not rev as high in 5th, but a lot less induction noise. ( I miss the sound but is was easier on the ears for the time spent behind the wheel) I felt that the sprint filters were sucking warm air and that the euro setup would be an improvement, but it wasn't, but at this time I am polishing a early 105 cast airbox and refinishing the cannister and realize that what I should get is a setup that has a free flowing filter with cold air intake and Air Horns to beef up low and midrange. short of a GTA box that is just to expensive, whats out there or do I have 1 more project this winter

Randy
Western Pa
76 spider (10th Italian car)

[sono veL.O.ce]

in response to the original question,
the advice given to me was that the euro airbox does a very good job, is less noisy, and because it is an airbox, not just a filter, It can channel in fresh cold air from the front of the grill.

That said I'm going with full radius stacks, and an ITG filter. because I like the weber noise, the filter comes highly reccomended from the same source, and I absolutely LOVE stacks on a weber.

However my project is STILL not finished and I cannot back my choice with any personal experience. Just that I made my chioce based on what I consider sound and knowledgeable advice, from alfa guru Dan Martin.

[Gubi]

Based on what I've read, I wouldn't put a K&N filter on any engine I cared about. The following is something I wrote in response to an earlier thread.

---------
I'm not convinced there's any significant power gain to be obtained from just dropping in a K&N. I ran one in my Integra for a while and maybe it revved a little freer at the high RPMs...can't really say for sure, as I didn't dyno it. At any rate, it was not a significant difference.

The reason I ended up pulling it out was I did some homework on filters and got concerned about how well oiled cloth filters protect your engine. I just don't think that the K&N filters do as good a job of cleaning the air as a good quality paper filter, and the performance gain for me was not enough to justify putting more dirt into my engine.

For example, K&N claims something like a 98% filtration efficiency versus 99% for paper filters. No big difference, right? Until you realize that that means the K&N lets twice as much particulate matter into your engine. They also do their testing using dust that is probably coarser than the typical stuff you see every day while driving, so the actual difference may be a lot worse. Their test dust is 5.5-175 microns (a human hair is 50 microns)...I bet there's a ton of dirt you're going to run into on the road that's down around 1 micron, especially stuff like diesel particulates.

If you search around on the web you can find a lot of pro/con info on K&Ns. For me, though, the risk of increased wear just wasn't worth it.

[borrani]

Here's the repro GTA airbox that came with my car.

I added the TWM or some UK outfit's 40mm long air horns. A shame to cover them up!

I had to bend the #4 airhorn to clear the fender. Autodelta's solution was to pound the fender well down. As it was I did take a hammer to my inner fender well, just a bit, but hey, Autodelta did it first!

I have pics of the Jochen Rindt Sebring-winning GTA that would floor you! The fender well is nearly flat, and they put it in a beautifully executed large oval hole, with cover, on the pass. side fender well to facilitate quick choke tube removal from the carbs, among many other mods. It's a local Seattle car now. Chassis 613 006.

Wish I could get some type of air filter on the car. Hate running without it. Need more time and money. What else is new?

Cheers,

Steve S.
AR 613 169

[italcarguy]

Steve,
Email me all the pics

[borrani]

I just love being surrounded by fellow alfisti fanatics. Love it! Here's a teaser:

shocking, eh?

[emr5503]

The GTA air horns had a 90 degree turn and fit inside the GTA fiberglass air box.

[CarPoor]

I was wondering what to use on my Super with a new 2 liter, but after talking to various sources, I've decided to retrofit the 1.6 cam cover to the engine and use a 1.6 stock cold air box and filter setup. The only thing I'm lacking now is the oval hose that connects the two. Anybody have a good NOS one they want to sell for a reasonable price? I've seen quite a few in poor shape, (They ARE almost 40 years old), and the one I had on the car looked good from the outside but collapsed internally when I put it on and ran the car. I plan to duct the tube to the front of the car to feed cool air to the carbs. Again, I think Alfa probably had a pretty good idea what the engine needed when they designed the system, plus, I like the "sleeper" aspect of a 1600 cam cover and airbox on a (mildly) built 2 liter. I'll report back on performance and sound once I get it all together and test it out.
Cheers,
Pat

[papajam]

The oval hoses pop up on ebay from time to time. I believe Re-Originals and a few overseas vendors have new ones.

[CarPoor]

Thanks, Jim-
I'll keep an eye out for a NOS unit. I think I risk another like the one that failed on me if I buy used. There's a NOS one on Ebay now, have it on my watch list.