Originally posted by jayfotos
and does it work?

http://cgi.ebay.com/ebaymotors/ws/eB...category=46100
Sure it will work! The question is how well...

Buy it and let us know!

It attenuates the signal coming from your intake air sensor, tricking the VX into thinking the air is colder and denser than it really is. In response the VX will richen the Air/Fuel ratio. Since a lot of cars are tuned on the lean side for mileage and emissions, they will benefit (power-wise) from some richening of the mixture. With closed-loop systems like what we've got the stoichiometry is never that far off optimum though so I doubt the gain would be 22hp as advertised. It's not beyond the realm of possibility that hp could bump up 10% but if our VXs were tuned that lean you'd think we'd be getting better mileage. Or maybe we've just got high overlap cams... Another thing that makes me skeptical is the dyno chart. It looks fake. Torque and HP should always cross at 5252 rpm and they don't on this chart.

And can you get 205hp out of a stock motor on a 4WD chassis dyno? Surely they wouldn't go the the expense of testing a cheap tweaker like this on an engine dyno?

K&N sells an A/F monitor that you wire up to your O2 sensor. If you're going to monkey around with the A/F ratio it might be a good idea to get one. This particular device can only make your VX run richer though, which is not going to cause any mechanical damage to your engine. Performance will suffer well before that occurs. (It may cause your cat. converter to glow though!) But if you end up with something that will allow you to tune leaner, watch out! Lean is mean. And sneaky. You'll run like a champ right up until you melt a hole in your piston.

This device reminds me of an engineer joke. It's just a variable resistor that you can get at Radio Shack for $3 but they're wanting $50 for it! I'm terrible at remembering jokes but here's the gist of it:

A manufacturing facility is having problems with one of their lines. A retired engineer is called in to diagnose the problem on this multi-million dollar machine. He spends a day looking and pondering and then places a chalk mark on a part and tells them to replace it. It works! He sends them a bill for $50,000. The company demands an itemized account of the charges. Engineer sends back an invoice:

One chalk mark --------------- $1
Knowing where to put it ----- $49,999