Anybody running these kind of Air Filters on a tunnelram

mopar65 said

Wow thanks for the link. For some reason when I was searching for velocity stacks ,those never showed up. The add says they are 4.5 inches tall and I only have about 4-3/4 inches of clearances to the bottom of my hood scoop. I wonder if only having a 1/2 inch of clearance is going to cause an air flow problem? Does anybody know what the recommended distance should be?

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I don’t know, because I’ve never done it.

Here’s some math to consider/make a judgment call from though:
The air horns are 8.5” dia., which is approximately 26.7” circumference. At 0.5” clearance, that’s a surface area of roughly 13.3 sq. in. I don’t know your engine, but let’s say it’s a 408 that you shift at 7,000 rpm, and you happen to have 100% VE at that point. Then you’d be flowing ~830cfm, or 415 through each carburetor. 415cfm divided by 13.3 sq.in. is about 31.2 fpm velocity, 0.52 fps, across the revolved face area for each stack. That seems sufficient when just looking at the numbers, but again, I haven’t done it so I don’t actually know. Being as they’re in a scoop, you may draft air across that area so fast that it doesn’t like to make the turn down into the stacks?

Sounds like a “fork around and find out scenario”. But it’s your money, not mine.