Im not in the market for one so not looking to be advised on a purchase. But I see this question asked all the time. Earlier this year everyone would reccomend the Raceland, but now everyone has been reccomending the BMC...I aint been overly active in these sections for a good few months, so has there been some new evidence showing the BMC to be better than the Raceland with green filter now?
I know the gains from these will be very minimal on any engine, so not a crucial decission for poeple, but every little helps.
There was some threads with gains on the BMC and the raceland showing the raceland with more gains, cant find these now though with the hundreds of threads about these kits now though.
I cant see how the BMC would have any advantage over the raceland apart from looks, quality and fitting.
The BMC seems so restrictive with just that fairly small hole in front of it, adding a cold air feed will help alot but then what about the surface area of the BMC filter...it dosent seem like the velocity of the air going round the filter will be that great? Obviously I havnt got any hard proof of this so just guess work....Not a carbon enclosure so im aware however there was a special or limited edition one that was made of carbon fibre, and therefore has the increased heat soak reduction?
However the raceland, has more of an open front scooping air stright from the cold air feed hold in the slam panal and therefore more free flowing air and not as restrictive as the BMC. Surface area of the raceland is also increased aint it? and the air forced to the filter and into the filter rather than around it? Build quality and fitment isnt as good but not hard to sort out at all. Also not real carbon fibre and being almost directly above the manifold will suffer from more heatsoak than the BMC but will gain from having the cold air entry to the enclosure than the BMC sucking air from the engine bay without a cold air feed. Also my mate got a 6bhp gain on the raceland from mapping at chipwizards by cutting holes in the top of the raceland scoop, so if that makes so much difference the BMC must be really insufficient?
Then you have the standard air feed and filter system which is quite hard to beat for its efficiency of getting cold air in and giving good power figures. With the small cold air feed on this working so well it makes my arguement for the BMC's restriction more invalid?
So has anyone got any detailed thoughts on this, or any RR proof of which is better. Might help a few poeple out that care a little more than looks and are after every single bit of power for the small time £.
I know the gains from these will be very minimal on any engine, so not a crucial decission for poeple, but every little helps.
There was some threads with gains on the BMC and the raceland showing the raceland with more gains, cant find these now though with the hundreds of threads about these kits now though.
I cant see how the BMC would have any advantage over the raceland apart from looks, quality and fitting.
The BMC seems so restrictive with just that fairly small hole in front of it, adding a cold air feed will help alot but then what about the surface area of the BMC filter...it dosent seem like the velocity of the air going round the filter will be that great? Obviously I havnt got any hard proof of this so just guess work....Not a carbon enclosure so im aware however there was a special or limited edition one that was made of carbon fibre, and therefore has the increased heat soak reduction?
However the raceland, has more of an open front scooping air stright from the cold air feed hold in the slam panal and therefore more free flowing air and not as restrictive as the BMC. Surface area of the raceland is also increased aint it? and the air forced to the filter and into the filter rather than around it? Build quality and fitment isnt as good but not hard to sort out at all. Also not real carbon fibre and being almost directly above the manifold will suffer from more heatsoak than the BMC but will gain from having the cold air entry to the enclosure than the BMC sucking air from the engine bay without a cold air feed. Also my mate got a 6bhp gain on the raceland from mapping at chipwizards by cutting holes in the top of the raceland scoop, so if that makes so much difference the BMC must be really insufficient?
Then you have the standard air feed and filter system which is quite hard to beat for its efficiency of getting cold air in and giving good power figures. With the small cold air feed on this working so well it makes my arguement for the BMC's restriction more invalid?
So has anyone got any detailed thoughts on this, or any RR proof of which is better. Might help a few poeple out that care a little more than looks and are after every single bit of power for the small time £.
