Air filters and ECU
Discussion
My view on aftermarket, replacement air filters:
If any of the multitude of marketing departments for these items could show, with proper scientific evidence, that their company’s filter improved power and still filtered at least as well as OEM, we would all know about it.
But they don’t, can’t, won’t.
Save your money and just replace the OEM filter more frequently with another OEM. Your engine will be far better for it over the long term.
If any of the multitude of marketing departments for these items could show, with proper scientific evidence, that their company’s filter improved power and still filtered at least as well as OEM, we would all know about it.
But they don’t, can’t, won’t.
Save your money and just replace the OEM filter more frequently with another OEM. Your engine will be far better for it over the long term.
bitemarx said:
I have enough horses, just hoping to get smoother delivery.
You're using terms that don't even have any meaning in physics in the hope that something intangible might happen if you change this air filter. It won't. Waste of time and money.
Mignon said:
WTF does "smoother power delivery even mean? Does your car kangaroo up the road? Does it lurch from pub to off license like a drunken Irishman?
You're using terms that don't even have any meaning in physics in the hope that something intangible might happen if you change this air filter. It won't. Waste of time and money.
Can you advise what shootout mode would give +10bhp and smoother delivery? You're using terms that don't even have any meaning in physics in the hope that something intangible might happen if you change this air filter. It won't. Waste of time and money.
Mignon said:
WTF does "smoother power delivery even mean? Does your car kangaroo up the road? Does it lurch from pub to off license like a drunken Irishman?
You're using terms that don't even have any meaning in physics in the hope that something intangible might happen if you change this air filter. It won't. Waste of time and money.
Hi, You're using terms that don't even have any meaning in physics in the hope that something intangible might happen if you change this air filter. It won't. Waste of time and money.
Thanks for your reply.
Maybe I mean the lag before the turbo kicks in; I'm really not sure.
It feels like the throttle response in the power band is not linear. Hope that explains it better?
Like I said in my first post, I'm not well versed in car talk. I simply enjoy driving them!
bitemarx said:
Hi,
Thanks for your reply.
Maybe I mean the lag before the turbo kicks in; I'm really not sure.
Even if an air filter was a bit restrictive it would only make a rat's arse of difference at high power outputs. How much air do you think the engine needs before the turbo even kicks in? Let me give you a tiny clue. It begins with F and ends with All.Thanks for your reply.
Maybe I mean the lag before the turbo kicks in; I'm really not sure.
bitemarx said:
It feels like the throttle response in the power band is not linear. Hope that explains it better?
Not in the slightest. But it's your money to waste.Thanks mainly to Mignon's comments, I did some digging via Google, which I feel I ought to have done before posting here. The weight of evidence seems to indicate that changing the OEM air filter for an aftermarket one would only make a difference if the existing one has reached saturation.
bitemarx said:
Thanks mainly to Mignon's comments, I did some digging via Google, which I feel I ought to have done before posting here. The weight of evidence seems to indicate that changing the OEM air filter for an aftermarket one would only make a difference if the existing one has reached saturation.
Yep. In other words, as I posted, just fit a new OEM (and no, not one off eBay!) more frequently than in the service schedule.bitemarx said:
Thanks mainly to Mignon's comments, I did some digging via Google, which I feel I ought to have done before posting here. The weight of evidence seems to indicate that changing the OEM air filter for an aftermarket one would only make a difference if the existing one has reached saturation.
Yep. In other words, as I posted, just fit a new OEM (and no, not one off eBay!) more frequently than in the service schedule.Tony1963 said:
Yep. In other words, as I posted, just fit a new OEM (and no, not one off eBay!) more frequently than in the service schedule.
15 years ago I bought a 2.0i petrol Focus. It had done about 30,000 miles. We put it on the rollers and got about std bhp. The air filter was brown as wossname, no doubt the original one, so I bought a new one. Put it back on the rollers and no difference. Modern efi panel filters are plenty big and have to be clogged to buggery to make any odds to power. I doubt if 100,000 miles would make much difference to one.Mignon said:
15 years ago I bought a 2.0i petrol Focus. It had done about 30,000 miles. We put it on the rollers and got about std bhp. The air filter was brown as wossname, no doubt the original one, so I bought a new one. Put it back on the rollers and no difference. Modern efi panel filters are plenty big and have to be clogged to buggery to make any odds to power. I doubt if 100,000 miles would make much difference to one.
Whilst I would say that an example of just one shouldn’t be considered the only way, yes, many cars from that era certainly had large filters. Sometimes this was through economies of scale, so that a base model may have been fitted with the same induction as an RS or whatever. OEM filters can be great things, filtering til the opposition has long given up.
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