I have seen a few threads on this and many arguments, the pd160 intake been the main mod that according to some is more of a placebo effect.

i like the look of the standard air box and have tried both standard and pipercross air filters, and after driving with the pipercross for a while the standard feels more restrictive especially since having a hybrid turbo fitted.

I am going to do some maf logs to see if there is a difference.

One mod that seems to cause the most arguments is drilling the bottom of the air box, now i understand that this sucks in the hot air of the engine bay and reduces the ram effect.

has anyone drilled one large hole in the bottom of the air box and then fitted a cold feed pipe to it, effectively having two air intakes?

have you looked into http://www.briskoda.net/forums/topic/301751-fitting-a-honda-s2000-air-filter/?hl=+honda?

 

i know its removing the airbox, but I think it looks pretty standard.

I have seen a few threads on this and many arguments, the pd160 intake been the main mod that according to some is more of a placebo effect.

i like the look of the standard air box and have tried both standard and pipercross air filters, and after driving with the pipercross for a while the standard feels more restrictive especially since having a hybrid turbo fitted.

I am going to do some maf logs to see if there is a difference.

One mod that seems to cause the most arguments is drilling the bottom of the air box, now i understand that this sucks in the hot air of the engine bay and reduces the ram effect.

has anyone drilled one large hole in the bottom of the air box and then fitted a cold feed pipe to it, effectively having two air intakes?

 

The idea that an air filter would "feel more restrictive" is slightly absurd, an air filter is fitted for one reason only; to filter the incoming air and keep abrasive particulates from damaging the delicate aluminium turbo impeller and being passed through the engine damaging the bores, rings, valve seats and valves.

 

In a turbo engine there is no 'ram' effect because the turbo itself absorbs any pressure pulses generated by the engine by 'chopping' the air into a continuous stream, the biggest 'restriction' in turbo engines is the turbo itself followed closely by the intercooler, the intercooler causes quite a substantial pressure drop but that loss is more than offset by the reduction in temperature and is therefore a good trade-off.

 

Consider a simple analogy; you're using a pressure washer to clean your patio, you're having trouble removing a particularly stubborn stain so you decide to turn up the water supply pressure at the tap to try and increase the pressure at the lance but it doesn't make any difference. It doesn't make any difference because the pressure washer has a fixed maximum delivery pressure much like your turbo.

 

There is a massive amount of nonsense talked about 'faster spool' as well, so let me clarify that, because you have a VNT turbo the 'spool' is controlled by an actuator which is in turn controlled by the ECU, to change the 'spool' you have to alter the ECU mapping, changing the air filter can't affect that so when someone tells you it 'spools faster' you can just laugh at them.

 

Please remember that a VGT diesel is a COMPLETELY different animal to a FGT petrol or even a naturally aspirated engine, so every bit of tuning wisdom you've ever heard about those is simply NOT applicable.

 

Also remember that the inlet air is being shoved through a very hot turbo and compressed which heats it up a lot, this is why an intercooler is fitted, as long as that CLEAN air going into the turbo is somewhere near ambient temperature then there will be no effect on power output because an intercooler cannot cool that air below ambient which is why some 'ricers' use water/meth intercooler spraybars to get it lower.

 

Either you're getting full boost or you're not, if you ARE getting full boost then no amount of fannying around with exhaust systems and induction setups will make a blind bit of difference, over the years here on Briskoda it has been consistently shown that unless your engine is making around 220bhp the standard inlet and exhaust systems are not holding it back, and the price that some people have paid for fitting crummy aftermarket air filters is turbo failure.

 

Why take the risk if there are no gains to be had?

Might not be much but a little bit of myth busting here. (Yeah I know they joke about a little but they prove what they set out to)

 

 

 

I guess some of the risk is down to the way it sounds.

We're wasting our breath, most of the geezas wot do these mods can barely read and write, their wisdom is received verbally from uvver geezas like them wiv froaty motahs. T'was ever thus, there's a cave painting of a K&N being fitted to a war chariot, it's in the bible somewhere as well.

Two of the disciplez, Kev & Nate made the first one out of mammoth hair, I heard.

Not sure what the chav/cockney writing is for but what you said before makes sense.

The turbo is always going to heat up the air, so the only way to effect intake temp is at the intercooler or like you said meth.

As for restriction i did a log of maf with both standard filter and pipercross and pretty much identical.

Edited 3 June, 201412 yr by Richard-vrs

Not sure what the chav/cockney writing is for but what you said before makes sense.

The turbo is always going to heat up the air, so the only way to effect intake temp is at the intercooler or like you said meth.

As for restriction i did a log of maf with both standard filter and pipercross and pretty much identical.

 

The 'chav' stuff wasn't aimed at you, it was a general prod, people have literally RAGED at me on these very pages for telling them their beloved filters do nothing good.

The MAF readings you observed will be because standard paper filters are directional due to the orientation of the fibres, this is deliberate to enhance the surge tank effect.