 Velocity Stacks for Weber 40 IDF's |
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| NJ914Guy |
 Mar 12 2011, 07:36 AM
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#1
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Member  Group: Members Posts: 150 Joined: 30-December 10 From: Deptford, NJ Member No.: 12,546 Region Association: MidAtlantic Region  |
My kit came with the Weber/Redline air filters but no velocity stacks. Does anyone have a good source for 40 IDF velocity stacks which will fit inside of the air filters? Will adding a short (est. 2" stack) inside the filter element make a real difference?
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| r_towle |
Mar 13 2011, 11:06 AM
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#2
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Custom Member Group: Members Posts: 24,624 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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with 40 IDF carbs on a slow velocity type 4 head, the short (1/2 inch tall) velocity stack that is built into the air cleaner base seems to be the right setup. Jake did quite a bit of testing on the proper heights to use and it certainly has alot to do with the camshaft and head setup you are running. Anything close to stock (heads, valves or camshaft) will actually experience a loss of power in the lower RPM range if the taller stacks are installed. As you add height (on the type4 motor) it moves the HP up in the rpm range and this is a high torque motor down low. Hard question to answer without knowing your specific setup and your intended use of the car. Rich |
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Posts in this topic
NJ914Guy Velocity Stacks for Weber 40 IDF's Mar 12 2011, 07:36 AM
nsr-jamie
My kit came with the Weber/Redline air filters bu... Mar 12 2011, 07:52 AM mrbubblehead aircooled.net Mar 12 2011, 10:14 AM NJ914Guy Thank you for the recommended vendors. Do you bel... Mar 12 2011, 10:22 AM Jeffs9146 There was a thread a few years back that did a tes... Mar 12 2011, 10:40 AM URY914 CB Performance are crooks when it comes to shippin... Mar 12 2011, 11:50 AM ripper911 My set from redline is also Velocity stackless, ho... Mar 13 2011, 07:36 AM J P Stein I bought some from a local VW bug shop. A 0 on the... Mar 13 2011, 08:59 AM jmill
My set from redline is also Velocity stackless, h... Mar 13 2011, 09:30 AM ripper911 off to the VW shop when I get a chance then! Mar 13 2011, 09:50 AM J P Stein Tell these guys they are not "vital" or ... Mar 13 2011, 10:36 AM jmill Apples and oranges. In a race car, where a few HP... Mar 13 2011, 10:53 AM
gothspeed
There was a thread a few years back that did a te... Mar 13 2011, 09:08 PM |
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