1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

air filter too short for velocity stacks?

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Old 05-06-05, 06:29 PM
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air filter too short for velocity stacks?

i got a new K&N filter for my sidedraft carburater. its shorter than the old beat up one i had. between the outer plate, and the end of the velocity stacks. there is only about 1.5 to 2 inches of room after the end of the velocity stacks. is that enough?



Last edited by lemonade; 05-06-05 at 06:42 PM.
Old 05-06-05, 06:52 PM
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That seems kind of close to me, what about using two smaller filters, one on each stack.
Old 05-06-05, 07:07 PM
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do this calculation:

1) measure the diameter of the intake throat
2) Take it's area = 3.14159*((diameter/2)^2)
3) Take the area of flow above the throat = (3.14159*diameter)*2"
4) Make sure all of your units are correct.
5) If (3) is larger than (2) you're OK, If it's close or less, you should use a taller filter.
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