[garrity455]

Well the filter you see on top, is the filter I have been running for years, as that is all that would fit on the car with the performer rpm and 1/2" carb spacer. it sat inside of the shaker. In my post from August 7th, you can see pictures of how that sit.

With the 1/2" carb spacer out, I can now run a 14" filter if I use the drop base, but I can run the 2.6" filter at most, while still closing the hood. The problem is, if I try to use the k&N filter lid, it hits the vents tubes. I could probably find a different 14" lid and put that on, but it would be about 1" above the mouth of the carb (because of the drop base).

So I figured it would be better to run the smaller filter on top of the 14" filter, than just a solid lid. And that filter will fit there, because it just sits inside of the shaker and still allows the hood to close.

Just your typical, 2nd gen firebird hood clearance issues with performer rpm intake.

I don't know if anyone has ever tried the stacked filter setup before.

Either way, next time out I intend to try the shaker on, with no air pan or filter.
If the car still runs faster with the shaker off, then I am going to try a bigger shaker (dude scoop), with no filter. If it runs as fast as no shaker, I will then try the stacked filters again. But if it slows down with dude scoop and no filter at all, then I don't know what to do.


Right now, fastest baseline is no shaker at all, with flat pan 14"x3" k&N and filter lid.

So next things to try.

1) Stock shaker, no air filter or pan. (If it runs as fast as no shaker, I know it is a filter issue, if it still slows down, then it is still a shaker issue).

2) Dude scoop, with no air filter or pan. Then determine results from there.

Then there is always the question of bigger carb than the 750, but I will get into that later.

And I could always try a single plan intake too.... Never ends, huh?