[Ralph Greene]

I appreciate Tach9's attempt to give an honest evaluation of those CAI kits. But I believe the results show only that they make some power by running car leaner, and therefore really prove nothing at all. While they may flow more air, it's not clear to me more air is needed or how much of the HP gain was caused by running lean, or by them being a superior product VS stock. However, we all know most racers looking for that last few HP usually run a CAI kit of some sort with a tune.

IMHO it is very difficult to test performance products like that back to back without also doing custom tuning for each one and car being tested under exact same conditions.

Also some products react differently with other products on a dyno. And dyno conditions also change as a day goes on.

So I think Tach9's tests only show what those products did on that car without any tuning, and really mean very little. I do believe the cat back tests were more useful than other tests, and I suspect under more controlled tests would show little HP difference between products, just sound difference.

But I do appreciate his efforts and do understand how almost impossible the job would be to install and custom tune with every product. So I agree with him that it "showed what it showed". I hope he doesn't get discouraged and contunues with the tests, Just learn to use that Preditor.