http://www.spiralmax.com/

The illustration section has some very technical drawings.

 

I think its a great design. It looks cool and unsuspecting motorists will pay top dollar for something that doesnt work, thus making the manufacturer lots of money.

 

Of course it will work.

It will work exactly as designed. It will take money out of your pocket, and place it into the acciunts of the seller. That's what the product was designed to do.

In exchange, you'll get an overpriced, cleverly advertised piece of crap, that not only won't do any good, but may actually be a detriment.

 

oh man thats about as true as it gets and to the point too...LOL...

I cant agree more

 

Exactly.

The problem with these things is that the inventors never heard of a little thing called CFM...

 

OK, I used to race karts, we ran them at 15,000RPM. They were 2 cycle engines. We found on the dyno that roughing up the intake ports would increase horsepower. That being said, there were 2 issues here, one of which is that the turbulance would increase the air/fuel mixture and increase the power. On the other hand, maybe it just mixed up the oil in the fuel better and that is what made more power.
But roughing up or "threading" of the intake ports is not a totally bad thing. That being said, I don't think that this gadget will work.

 

"Typical range of improvement over baseline is:
0 to 35 increase in horsepower,
0 to 31% increase in fuel economy."

At least they are somewhat honest. 0 increase in hp? 0% in tq? Nice.

 

That's true. Any wet intake should have anything but a smooth surface. A little turbulence at the perimeter and walls helps prevent precipitation of hte liquid fuel (and oil, in that case). That has to at least hep with efficiency, and efficiency is power.

 

Couldn't you install TWO in series and get a gain of 35%~70%??

Sounds like it would work with 2 of them to move the base gain away from zero.

I'm ordering up three or four to try them out.

 

Sorta does the same thing the tapered opening of the plenum does.

I know a bunch of kids with mustangs running these. They did infact gain 1-2hp on the dyno.

I myself used to be on the point and laugh bandwagon, but I've since learned to hold my comments until I've seen it in action.

-- Joe

 

1-2 hp on the dyno, as you know Joe, is not even worth mention. I find it hard to believe that this would effect the pulses enough to travel back through a muffler, possibly an h-pipe, cat(s), collector(s) and effect in any way the pulses or secondary waves. If anything I see it maybe creating an effectivley longer pipe. :shrug:

 

I'm just saying what was reported back to me.

I've also heard some guys on here said they added one and went slower.

Generally, I havn't found any mentioned in any of my intake design books.

-- Joe

 

I have decals that gave me more HP than that............