Anyone running BMC CDA or similar..

[r8byb]

Hi guys im running one of these, air filter hose runs down the wing, to the front bumper.

Now ive just thought would i be better to remove the ducting off the end of the filter, and leave the end open but leave the filter in place, so the filter is still enclosed but has access to more air ?

Could drill some holes in the plastic houseing too ?

Thanks Rob.

 

[Myki da Pyki]

I wouldnt go drilling holes in your BMC mate. They are designed to work as they are so you dont wona go messing with it. For more air just go for an open cone filter

 

[r8byb]

i just thought doing this would keep the cone shielded from heat whilst allowing a flow of more open air.

Its not a carbon BMC the one with the plastic around it instaed its BMC CAI or something

 

[beattie17]

Just sell BMC and get an open cone filter

 

[rogers]

bmc aqctually make open cone filters......

 

[PhilW]

Undo the cold air feed but leave it close to the mouth of the filter.

 

[r8byb]

Cheers Phil.

 

[Beaker™]

I ran my BMC CDA with about a 2" gap between the filter housing and the cold air feed, made some nice noises like that.

 

[Bing_17]

i know cupra_elliot runs a bmc on his, apparently it sounds good! not sure about how the cold air feed it though, PM him, or im sure he will see this thread.

 

[TurboCupra]

This is a wind up right? buy an enclosed filter to get cod air directly from a cold source... then open the passage to the warm engine bay? open filter in warm engines bays are a complete waste of time.. give away power..

 

[Robbie C]

I honestly fail to understand now it's going to make any significant difference when the air is going through an intercooler first anyway.

 

[r8byb]

so air sucked through the air filter goes into the intercooler ? ... thought it went down TIP into turbo..

 

[Robbie C]

From Air filter -> TIP -> Compressor housing --> Intercooler --> Inlet Mani --> Engine --> Exhust Mani --> Turbine housing --> Exhaust

 

[r8byb]

Ok, so the theory of havin the cold air feed there, but not attached is surely better cause the filter has access to more air .. ?

 

[PhilW]

I dont get long CAI's anyway. Surely sucking through 1 foot of pipe is better than sucking through 3 foot.

Plus your turbo works hot and your got an IC for cooling.

 

[Robbie C]

Ok, so the theory of havin the cold air feed there, but not attached is surely better cause the filter has access to more air .. ?

That's my view yeah, but it does go against the primary design of the BMC which is an enclosed system.

 

[r8byb]

I understand what your saying Robbie, on a saxo for example id leave it enclosed, but 1.8T sucks a hell of alot more air through and its only a 2" intake on the BMC i think which i though was possibly a bit to small.

I was under the impression people use jetex open cones and they have the best ratings, but there open to all the heat under the bonnet.

 

[Robbie C]

Indeed, I recently changed my standard airbox with Green panel filter to a Jetex cone and to be perfectly honest didn't notice any difference in performance (and at this time of year heat soak isn't going to present a major issue anyway) but the MAF logs that Benny and PhilW have done show a clear increase in air flow so that's what I'm sticking with.

On an N/A car it's a different story but with an intercooler I don't see heat soak presenting a major issue. The filter on the Cupra is fairly out of the way of direct engine bay heat and with a decent CAI I don't think it'd be sucking in much hotter air.

 

[PhilW]

I'm gonna throw one out there, warmer air is less dense so it actually moves quicker.

 

[r8byb]

Think i know a solution, sell BMC to someone with a saxo/corsa, buy Jetex