[Scimitar335i]

I want to start modifying my 335i. I was looking at the intake setups and so far I have been leaning towards the BMS Single cone intake. What I am worried about is heat. I do see, in some pictures the snorkel pointing at the filter.

Does this offset the heat? Meaning, does this hit the filter with cold air since the filter is exposed inside of the engine bay? Like I said the single BMS one I like.. the dual set-up looks a little chintzy to me.

Any help you guys can give me would be great!

THANKS!!!

[335iheLLraiseR]

and please define "chintzy".

[335iheLLraiseR]

i'll help somewhat.

here:

Originally Posted by shiv@vishnu

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 travelled 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!).

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[Tuned335i]

Originally Posted by Scimitar335i

What I am worried about is heat. I do see, in some pictures the snorkel pointing at the filter. Does this offset the heat? Meaning, does this hit the filter with cold air since the filter is exposed inside of the engine bay?

Proponents of the dual-cone intake will tell you that the low restriction of the dual-cone outweighs the engine breathing extremely hot air.

[Haretakis]

If you are worried about heat, maybe consider the Logic. While it is not a true CAI, it definately is far enough way from substantial engine heat to help bring cool air in and a lot more of it. You can always do the DIY snorkel mod to point the snorkel right at the filter and the brake duct mod to get even more ram air.

[addy85]

Get a CAI, I love mine