BMC CDA vs RS2 Airbox

[MarT2]

What is the best options for a RS2 remapped?

A BMC-CDA Air filter or a RS2 Airbox?

Cheers

[Jamo]

RS2 airbox all day long

[s2driveruk]

why...? what are the pro's and con's for the airbox versus a carbon alternative

[Rusty]

Perhaps there are no advantages either way! Not sure on the sound of a BMC carbon system but I prefer the airbox sound to a cone filter. Biggest problem is getting a substantial cold air feed to the BMC airbox IMO.

[Fat Audi 80]

And avoiding heatsoak being right next to the turbo!

[s2driveruk]

could get it fed from behind the wing i guess which is sufficiently shrouded from heatsoak etc.

RS2 is probably the right way fwd but interested in why the BMC should be dis-regarded without some real rationale personally.

[Rusty]

BMC has the same shielding as an airbox, IMO it's down to what noise you want your car to make. I thought about a BMC but at over £200 to get one with the Samco 90 deg bends etc it was an expensive option.

[Jamo]

Why? There are various dyno runs with a BMC airbox.

They are all down on torque in the lower range with a minimal gain in the upper.

[andyg plym]

...

ive got a bmc airbox (carbon cylinder type) its off the car at the minute but sounds LUSH!!!!

[s2driveruk]

Why? There are various dyno runs with a BMC airbox.

They are all down on torque in the lower range with a minimal gain in the upper.

There....real data see that indeed makes the case for an rs2 box

[Rusty]

Why? There are various dyno runs with a BMC airbox.

They are all down on torque in the lower range with a minimal gain in the upper.

Searched for the dyno results but can't find anything. Any links? When you say that it's own on torque what do you mean? What power gains were seen? I'd be completely suprised if there was any discernable change in performance, usually it's just the increased noise that makes the car feel faster but that's just my opinion, hence the chopped ABY box on my car.

I've found plenty of pics of various BMC setups, SPS-Si and GandalfS6 had one and S2Avant was looking into it but I don't think he bothered in the end. They look great and are a better idea than just a cone filter but I can't see that they offer anything much over a well installed cone filter with cold air feed and shield and that doesn't cost £250 to achieve. The major issue with the BMC item is that the costs nearly the same as an RS2 box with K&N pannel. No brainer there IMO although there are plenty of other things that I would spend £250 on other than the RS2 item.

I have a cone filter that I run for a laugh every now and again but that's just for grins as it sounds immense but annoys the hell out of me for daily driving. Makes track days fun though, I had fumes venting through it at Combe for ADI. Every time I lifted off there was a white gas venting from the bonnet gap, quite worrying when you're heading into Avon Rise at 120+...

I think that if you're seriously thinking of buying a BMC then you try a cone filter first to see what you think of the noise, try it for a few days though as the initial amusement is quite intoxicating