Quote:
Originally Posted by e90AW335i
Get the dual cones man, for $139 from BMS you cant go wrong....
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So, again, how can other dual-cone intakes that also sit at the top of the engine bay (and are not true CAIs) like Terry's BMS dual-cone intake and the Vishnu dual-cone intake provide real gains, but the aFe intake supposedly loses power?
Doesn't make sense to me.
From Shiv's technical data about the Vishnu Dual-Cone Intake...
"This is also why drop-in air filter upgrades are only worth a few horsepower and not the
15-25whp we often see with our high flow Dual Intake System!"
"What about cold air ducting?
The truth behind the matter is that lack of restriction is far more important than "cold air ducting". Especially in intercooled turbo systems. In such a system, the only temperature that matters is that of the air as it enters the intake manifold. But this air has already been on a long journey. It originally entered the system at the air filters. Then it traveled through the turbos, through a bunch of piping, then through the intercooler, through more piping and only then to the intake manifold.
With the exception of when it passed through the intercooler, the air picked up heat at every stop. The largest heat gain occurred in the turbo during the compression stage. Here, air temps can easily rise by 150 deg F. A whole lot more than the 10-30 deg F gained from drawing air from under the hood (and not through a cold air box.)
With the vast majority of heat generated in the compression stage, it makes sense to address this stage and see what we can do to cool things down. First of all, we can actually reduce the amount of compression. And yes, we can do this without reducing boost pressure simply by eliminating the negative pressure (vacuum) at the turbocharger inlet. This reduces the pressure ratio which makes the turbo spin slower and generates less heat. And not only is there less heat generated through the reduction in compressor RPM, the amount of exhaust backpressure is also reduced. Add both effects together and you get a car that makes more power with less stress on the turbo.
In fact, at 14-15psi of boost, our Dual Intake system offers a 15-25whp advantage over the stock cold air ducted airbox. And not only that, intake temps at the intake manifold is measurably cooler (that's what datalogging is for!).
How much power will I make with it?
With our PROcede v3 running the standard map, on an otherwise stock car, expect to see 360-370whp on a dynojet. Assuming proper testing methods of course (good intercooler fans, reasonable ventilation, etc,.)
http://www.vishnutuningforum.com/for...read.php?t=421
Then, there's Terry's BMS Dual-Cone Intake dyno @ +8WHP/+13 lb-ft. RWTQ...
http://www.rixeffects.com/store/node/22