Anybody see an increase or decrease in power with a one inch spacer

 

YES!!!

There is one that was just tested by Super Chevy. Let's see if I can remember the name. They called it a "Super Sucker". They put it on a dyno before and after, with no other changes, and managed something like 15 hp and 10.5 lb-ft increase with this thing. And it was a 1 inch, and furthermore, that's about what they advertised.

The 2 inch Supersucker is advertised to increase by 22 hp and 20 lb-ft. It probably does, based on them telling the truth about the 1 incher.

I believe it was the March 2002 issue of Super Chevy. Even though this is still January.
It should still be on the news stands, in fact.

 

Don't expect those numbers in a mostly stock engine though.

 

It all depends on what your engine needs. If it will benefit from increased intake volume, you will gain power. If you already have a nice intake that already sits higher, the gain will be minimal--or you could lose power if intake is already optimal. A simple "you gain XX HP" doesn't apply.

 

I realize that.
But typically, anytime you can raise the distance the air/fuel charge drops, you can usually pick up torque, and from that you get power. That's why the tunnel ram has the power potential that it does.

Of course, this is assuming the rest of the engine combination is also optimized. I am not a believer in what I call "optimistic math", where you add 7 hp for an air foil, 15 hp for a K&N, 20 hp for headers, 40 hp for a chip, 12 hp for high flow runners, 50 hp for the right decals, 50 hp for a huge rear wing, etc... And magically come up with a "500 hp" car that mysteriously still only does 16's.

What turned me on to this thing is that they took a warmed over small block Chevy and made no other changes other than to add the "super sucker". And they did achieve the results advertised. And I was just saying that usually doesn't happen. In this case, Super Chevy verified that it was legit.