I had an HKS filter, now a pipercross but havent fitted it as it arrived in the Mail, I put in the shed, and now thanks to your post realized I need to go fit it ?

 

There is a YouTube video of back to back dyno runs and the hks filter loses power vs the standard filter. I think Toyota have done a very good job with the standard filter.

Unless you can prove gains I wouldn't bother. I would like a bit more noise but I wouldn't do that unless you can atleast prove you don't lose any bhp.

 

Foam-Filters like HKS or Pipercross are the worst thing you can do to your motor.
Filtration of particles gets worse, wear of motor gets increased.
Only intake-sound gest a little better.

An better option (for me) is an oiled cotton-filter - still a better sound (you here working of the blow-off-valve more)
-but much better filtration than an foam-filter. BMC is a very good choice - they original powered the BMW M3 (E46).

Regards Grinder

This works in my GR:

 

The pipercross isnt oiled anymore, I had it in my volvo t5 (they introduced the pipercross dry type a few years ago) and had no issues. The 5 cylinder noise was a treat to the ear

Ill take pictures when I get home next week(hols) of the filter structure.

 

Air filter threads are like exhaust threads. People want different things.

A bigger noise at the expense of accelerated wear and sometimes power output is apparently attractive. To each their own.
Pure guess, but Toyota's filter will probably be a pretty good compromise.

It would be great if all aftermarket filter manufacturers provided filtration (read engine damage reduction) stats for their filters alongside their hero dyno stats.
I wonder why most do not?? ?

As the number one purpose for this component to exist is to filter air, you would think that that would be an important characteristic to retain or even improve while seeking more power or noise.

Check out the video below for a wider perspective.

It has a bit of an amateur hour feel and the National Physical Laboratory are unlikely to be worried about the competition ?
But, having watched a few of his videos over the years, they are pretty well done so worth a watch.

 

Can still pour a little oil on the fire. Pipercross has a video online because the filter brings +7 HP )

 

ITG

 

Yo tengo un k&n y puedo decir que suena algo mas la valvula de descarga y el sonido de la admision al acelerar, si ha ganado o perdido potencia no lo tengo claro, lo que si noto es una curva diferente en la potencia, con el filtro oem entre 4-5 mil rpm noto mas par, pero al llegar a las 6 decae bastante y con el k&n no se nota tanto par entre las 4-5, pero sigue estirando igual asta las 7,da impresion de empujar mas arriba

 

If you want performance I’d focus not on the filter but design of the air intake.

The key aspect is the friction losses before and after the filter not so much the filter itself, the filter has large areas to cause minimal losses already it’s the bit after I would look at. If you wish to optimise performance efficiency.

Think of it like an exhaust, small diameter and bendy you know is restrictive, a mesh or filter at the end isn’t going to make huge differences. (It’s not the same but might help put into perspective)

 

Thanks for the responses so far. Looks like the marginal gains are probably not worth it and the OEM filter is pretty good at looking after the motor. Also with a service plan the panel filter would be regularly changed by Toyota anyway ?

 

Should that really be the case (OEM vs. Pipercross), I would say that it has added value and that is not insignificant.

Minute 5:00

 

And

1 is Oem AF, 2 OEM +Pipercross AF, 3 Oem AF + Aftermarket Exhaust, 4 Pipercross AF + Aftermarket Exhaust

 

Thanks, so a small gain is achievable ? My main reason for changing it would be increased induction noise, but I've fitted a non-resonated Milltek system and I'm not sure I would hear it. I'm clearly not ready for a Tesla ?

 

I have both the milltek non res and the Filter. Yes, you can still hear it .

I also have a Tesla, perfect for trips that you don't feel like going ...

 

Interesting that the pipercross does seem to give a bhp boost vs oem and the hks loses power vs oem.

Makes you wonder how accurate these dyno runs are and also, if the people making the videos are somehow attached to the products.

Maybe we should all just let our bum dyno's decide? ?

 

Presumably Toyota fitted a paper air filter because it's cheap and easy to replace, but what have you guys fitted?
I don't want a new intake, just a better filter, but is there really any benefit?
Most performance options appear to be layers of different grades of sponge. Even my lawnmower has a sponge filter and this is easy to clean rather than replace. Some sponge filters seem to need oil, some don't. I think I would rather avoid oil if it's going to mess with the sensors. Are there any warranty issues if you fit a 'better' filter. Would I hear any more induction noise over the sound of a non-resonated exhaust, and would I really notice tiny gains in bhp or torque?

The oem filter is not just a paper filter, it is a specially developed paper & fine fibre compound filter for maximum air flow and maximum dust filtration. Do the aftermarket filters have superior dust filtering qualities?

 

Look at the link below regarding one ISO5011 air filter test. The results may surprise you.
It shows good marketing is vital when selling a product rather than the way it performs.

https://www.project200.com.au/dm-iso5011/

 

Arlen Spicer's summary at the end is dead on IMHO ?

Should be required reading for anyone thinking about making improvements.

 

Wow that's a comprehensive report!
I'm liking the OEM filter more and more ?

 

Just adding, I inspected(ie removed the filter from it's packaging) the pipercross filter today. It is a dry filter, but it isnt cotton or paper, it still is a foam type filter despite the Box saying "dry"

 

There seems to be 3 layers of foam with varied stuctures, the coarsest being first followed by two finer structred layers.