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Author Topic:   Stub-stacks?
stang106
Gearhead

Posts: 786
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001

posted 08-30-2002 06:58 PM     Click Here to See the Profile for stang106   Click Here to Email stang106     Edit/Delete Message   Reply w/Quote
Do they work? Can they be used on the street with a choke?
Thanks,
Dave

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Boss302
Gearhead

Posts: 841
From: Coleman, Wisconsin
Registered: Jan 2002

posted 08-30-2002 08:33 PM     Click Here to See the Profile for Boss302   Click Here to Email Boss302     Edit/Delete Message   Reply w/Quote
is that another name for Velocity Stacks??? or are you talking about something way different

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Max
-1989 Mustang GT (MaxTang)
225/50R15 tires
BBK Strut Brace
K&N Filter
4 cats, no muffs
180* stat
Member 1,861

"My Best Friends Are My Dog, and My Car"

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SteveLaRiviere
Administrator

Posts: 45869
From: Saco, Maine
Registered: May 99

posted 08-30-2002 08:50 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
I don't know if they'd clear the linkage on the side.

Max, they are short velocity stacks made by K&N:

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All Fords since 1977!

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stang106
Gearhead

Posts: 786
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001

posted 08-30-2002 08:52 PM     Click Here to See the Profile for stang106   Click Here to Email stang106     Edit/Delete Message   Reply w/Quote
I'm talking about K&N's 'Stub-stacks' that fits on top of the carb and is supposed to help airflow into the carb.
Dave

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SteveLaRiviere
Administrator

Posts: 45869
From: Saco, Maine
Registered: May 99

posted 08-30-2002 08:53 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
I found this on:
http://www.prestage.com/partsthatwork/kn.asp

The K & N Stub Stack is also one of the best dollar-for-dollar values on the market. I have repeatedly tested my car both with and without this simple device and have always ended up putting it back on because the car goes faster with it than without it. When I was running a 600 vacuum secondary carb (which was probably a bit too small) the stub stack was good for over 2 tenths of a second in ET! Even now, with a 750 double pumper on my 350 SBC, I have tested it and it still gives me about 5 hundredths of a second better ET - still a bargain as far as I'm concerned.

One thing you need to be careful of when using the stub stack, it essentially raises the top of the carb about an inch so make sure you have a tall enough air cleaner so that it leaves aabout 2" of clearance between the top of the stub stack and the air cleaner lid. If you don't do this, it may restrict the amount of air that can get into the carb and that certainly won't make you go faster. This can be a problem if you are using a 3" air filter element with a drop-base style air cleaner so you need to pay attention to this when you go to install it.

I don't know of any other product costing less than $40 that will give you so much of a performance increase. Installation is also a breeze, just take it out of the box and slip it over the air horn of your carb. Total installation time (including opening the box) is less than 5 minutes and you really can't screw it up. K&N has a number of different Stub Stacks that fit a variety of carbs including Holley 4150, 4160, Dominators.

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All Fords since 1977!

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stang106
Gearhead

Posts: 786
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001

posted 08-31-2002 01:33 AM     Click Here to See the Profile for stang106   Click Here to Email stang106     Edit/Delete Message   Reply w/Quote
HMMMM,
good info, Steve. I'm using a stock airfilter housing with a higher K&N filter so the lid is raised about 1/4" but looks closed. The transition from the airfilter housing is very disruptive so I'm thinking it will work, someone here should know.
Dave

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'70 ragtop Stang
351W - 13.70 @104.

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GTS Racing
Journeyman

Posts: 76
From: Thor, Iowa 50591
Registered: Dec 2000

posted 08-31-2002 12:33 PM     Click Here to See the Profile for GTS Racing   Click Here to Email GTS Racing     Edit/Delete Message   Reply w/Quote
OH Boy do they work!! Our competition, and our best friend, gave us his to try out. In 95 degree heat and humidity we ran a 7.32 et in the 1/8th, after the stubstack was installed we ran a 7.19 and the car was very consistent. I was talking to the K&N guys up at Brainerd a couple weeks ago, he was shocked it picked up that much by itself. He told us it was designed to be used in conjunction with the Extreme air cleaner assembly. We bought the set up, but have to either buy a cowl hood or do some major massaging on ours. In my opinion, it is definately worth the $25-$40 it costs, depending on carb model of course.

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SteveLaRiviere
Administrator

Posts: 45869
From: Saco, Maine
Registered: May 99

posted 08-31-2002 07:17 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
That's one of those things I've always wanted to try but never got around to. I think I will now.

They look cool, too!

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All Fords since 1977!

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