I agree. I suppose I could see if a person was a serious competitor, 1/10 of a second and 1HP is a gain. I'm not a competitor. For me, the extra approximate $500 for DCAI with a totally mixed opinion on true gains isn't worth it. That's money I would rather use on powder coated wheels or a good wet sand and polish.

I had the money for the DCAI but I think, in my opinion, people see the symmetrical appeal more than actual performance gains. Having said that, if a person had heads ported and polished, honed valve guides, and added headers/high flow exhaust, they MIGHT see some worthy gains with DCAI.

There are a lot of guys on this forum far more knowledgeable than me. Some are experienced competitors, some are engineers, and some are like me, old school motor builders. My thought process is influenced from building carbureted small block chevy and mopar big blocks. That logic is "you can only move as much air as you can get through those heads/guides." That's why we always started with porting and polishing, honing valve guides, and then moved into headers and high flow exhaust.

The Dyno tuner I use fits into the "highly intelligent" engineer department. He spouts off all of this mathematical reasoning, physics stuff that leaves me saying "uh...ok." But in the end of it all, he comes right back to my logic; only so much air can be moved through that motor. The only real benefit a person might get, in my humble opinion, is perhaps a cooler temperature air moving, but then one could argue that having the DCAI gives three more feet of aluminum tubing to super heat, which might actually heat the temperature of air. For me, if I can't get 10HP or more out of a mod I'm not interested. Right now with the 62mm pulley and single CAI I got that and then some. The dyno tune coming next week should give much more although he thinks his greatest gains will be in torque, of which I already have a lot. To the point I'm breaking loose brand new tires in WOT shift changes 1st through 3ed. I'm good with that!