Velocity stacks vs K&N filters - Page 2 - Alfa Romeo Bulletin Board & Forums
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post #16 of 36 (permalink) Old 07-14-2016, 07:55 AM
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Quote:
Originally Posted by 105 junior View Post
I run this air box with stacks inside,
Yeah. This would solve a problem for me. What's the source?

Don P
Carson City, NV

Past Alfas...
59 102 Touring (first Alfa $500 running)
65 Sprint GT (2nd Alfa, $500 daily driver)
102 Sprint (never did anything with it, but wish I had)
74 Berlina (first new car - now certainly rusted into oblivion)
61 Giulietta Spider G-Prod Race Car (where is it now?)
84 Spider Veloce (rarely drove it, so sold it)
86 Quadrifoglio (Dull car - no more 115s for me)
1971 Montreal "The Full Monty". Fair winds and following seas

Current Alfas
59 102 Touring Roadster - restoration complete, enough Alfa for any rational man. Or irrational, for that matter
Oops. Add to the "present" list, 10204 01488, 2000 Touring Roadster project

And past...
Two 1946 Stampe SV4C (c/n 294 "Rocinante" - wife's favorite airplane. RIP), and c/n 235 "La Bon Temps Femme" (gone to a new home, but never forgotten)
Zlin 50LA (+9 -6 gees, titanium spar, 1200 lbs, 260HP rumored to now be in Brazil)
1946 Luscombe 8A
Starduster Too (recently spotted at the Nevada City, CA airport - over 20 years and an entire continent separating it from our stewardship in Binghamton, NY)
1955 Cessna 170B (wife taught me to fly tailwheel in this)

And present...
64 Mooney M20E ("Rambo". My faithful steed for over 40 years) Over 55 years old, and just returned from a trip to Argentina in him
Newest in the fleet
1967 Piper Super Cub on Wipline amphibious floats (a true "all terrain vehicle")
2010 Triumph Thunderbird


You can snap roll an Alfa only one time...
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post #17 of 36 (permalink) Old 07-14-2016, 11:10 AM
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I would also be interested in where to get the air box

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post #18 of 36 (permalink) Old 07-14-2016, 01:28 PM
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The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
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post #19 of 36 (permalink) Old 07-15-2016, 02:20 PM
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These are the velocity stacks inside the box, i can remove the box and fix foam filters to the stacks if and when I feel like making some noise 😀😀
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72 2L GT Junior 73 2000 Spider. 2004 Alfa Romeo GT 3.2 V6.
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post #20 of 36 (permalink) Old 07-15-2016, 02:41 PM
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Box is by vin sharpe, pace engineering in Melbourne Australia, he's a member here, Google is your friend.
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72 2L GT Junior 73 2000 Spider. 2004 Alfa Romeo GT 3.2 V6.
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post #21 of 36 (permalink) Old 07-15-2016, 02:41 PM
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The passenger seat is 15 miles an hour faster than the drivers seat.

currently
2017 Giulia Q4
74 GTV restored daily driver
71 Berlina in 2L restored driver
the ones that got away:
1959 750 series Giulietta Spider Veloce
1962 Giulietta Spider normale
1965 Giulia Sprint normale
1972 GTV
1974 GTV
1974 GTV
1977 Spider
1974 Spider
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post #22 of 36 (permalink) Old 07-15-2016, 02:56 PM
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Pure sexy!!

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post #23 of 36 (permalink) Old 02-07-2019, 02:57 PM
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Hey folks - old thread but did anyone ever manage to source the pictured airbox from the renowned Vin Sharpe of Australia? After a bit of googling I'm coming up dry on a clear way to find it, but it looks like a quality and straightforward way to go.
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post #24 of 36 (permalink) Old 02-07-2019, 03:30 PM
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post #25 of 36 (permalink) Old 02-07-2019, 03:38 PM
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Look on eBay, (believe it or not) they are made by a forum member I believe. His name here is aguirola, do a search under his username and you will it, or just search air box you will his name.

Cars ruined my life! 😱

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post #26 of 36 (permalink) Old 02-07-2019, 03:40 PM
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Quote:
Originally Posted by VabeneGTV View Post
Look on eBay, (believe it or not) they are made by a forum member I believe.
This?? https://www.ebay.com/itm/Alfa-Romeo-...p9X:rk:42:pf:0

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post #27 of 36 (permalink) Old 02-07-2019, 05:03 PM
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Be aware that long stacks often result in a dip in the torque curve. Reversion causes fuel laden air to be expelled from the mouths of the carbs which is then sucked back in causing a rich AFR. The longer the horn the bigger the rich dip and torque dip. Unlikely to be a problem with US spec cams but likely to be a problem with cams that make more power.

Ed Prytherch
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A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
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post #28 of 36 (permalink) Old 02-08-2019, 08:25 AM
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Quote:
Originally Posted by VabeneGTV View Post
Look on eBay, (believe it or not) they are made by a forum member I believe. His name here is aguirola, do a search under his username and you will it, or just search air box you will his name.
Indeed, we still fabricate them, now of world renown

Take a look: https://www.alfabb.com/bb/forums/gta...-need-one.html

Regards, Alberto

To order, please contact at: [email protected]
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post #29 of 36 (permalink) Old 02-08-2019, 10:13 AM
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Thanks folks, and @aguirola. That's great news and I'll reach out directly.
@alfaparticle if you were running an air box sourcing air from the front, on a slightly hotter 2L cam and 40DCOEs, would you run any horns at all? If so what length, to avoid the sudden richening problem?
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post #30 of 36 (permalink) Old 02-08-2019, 11:33 AM
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I posted some rpm/AFR curves a few weeks ago showing the effect of valve timing on the rich dip on my motor with a modified stock airbox. You should be able to find them if you search for my name and AFR. This motor has cams that are much more aggressive than stock. The dip is greatest with the most advanced timing of the intake cam - 99 degrees in this case and it was almost gone at 108 degrees. So tuning your cams for top end performance - more advanced intake timing with produce a larger torque dip. Tuning for more mid range torque - less advanced intake timing will minimize it.
Longer intakes will make more torque and extending the intake runner length is probably more effective than fitting long horns.

Ed Prytherch
79 Spider
85 GTV6 3L
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
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