BMC Induction kit - R32OC

ghostfacesuk · 2nd June 2009, 12:02 PM

Hello all,

I have been looking at the BMC enclosed induction kits for the MK4 R32. I would like to know a few things before I get one.

1) Is it worth getting one for a start, I guess the idea of them is to be less restrictive than then standard air box but does it actually help?

2) How easy are they to fit and what tools would I need?

3) If I got one would I need to get an oil catch tank?

4) Is there a better filter than the BMC one? If so why?

I am not sure if there is a similar thread on here about this; if there is could someone be nice enough to point me into the right direction?

Thanks in advance,
Steve

Bluelion · 2nd June 2009, 12:40 PM

(1) I assume you're talking about the BMC CAI? I fitted one to mine and the dyno results were greatly improved. Bearing in mind I've got other modifications (full exhaust + remap) I saw an incredible +22hp gain on the rollers on Saturday just from changing the filter to a BMC.

BUT... I noticed last night looking at the pre-BMC rolling road chart that the rev limiter cut it before at 6800rpm, and on saturday at 7200, so I'm actually wondering if I took the right graph home last year (despite it having my registration on). This would certainly explain the differing results, as I find it very surprising that the filter made this much difference. Nothing else was changed though - same dyno just 18 months apart and 1 BMC CAI fitted in place of a Pipercross panel filter.

(2) Easy, you only need a couple of screwdrivers and sockets to remove the old one. Be careful you don't damage the MAF, and its quite fiddly feeding the air tube down to the lower vent - I removed the battery for better access. Give yourself a good 4 hour session to do it steadily, you might do it a lot quicker (a pro would do it in under an hour I'd guess) but that's about the length of time it took me.

(3) Er well I haven't. Not sure I understand why you think you might need one of these? You're only replacing bits on the open side of the MAF, not the engine side.

(4) People like the Carbonio kit so will probably recommend that. I didn't want this kit at it puts the filter down directly in the air flow behind the passenger side lower vent. I didn't want it getting soggy when traveling along in the rain - the BMC kit keeps the filter in the engine bay thermally insulated from the engine heat by a carbon fibre casing (at least I think its CF, its certainly CF-like if its not!). I think the BMC is a bit more expensive than the Carbonio though.