Air-filters

So what's it going to be then. I am confused...does the dirt going into the cylinders with the air via the compressor blades, then out the exhaust as hot dirty/gritty gas, hitting the turbine blades and going out the exhaust pipe actually affect the colour of the oil? Please explain, anyone. I would still like to know which would be the safest cone filter to install. I am thinking of changing my stock filter out for one that I can service and re-use.

I am back to paper filter. I stay with the stock air box. What I have done to the stock air box was to force the air in on the side of the box. Cone filters if not sealed seperately from the engine bay, results in a lot of heat. Surely this must make sence?

Cone filters if not sealed seperately from the engine bay, results in a lot of heat. Surely this must make sence

At last someone with a brain pipes up:)

Thats why BMC CDA FTW.
What I see is people with cotton air filters do not oil them after washing and that is critical. Without oiling they dont filter properly.

I have seen Off road racing cars run ning BMC filters properly oiled change filters 3 times during an event they get so dirty but the motor lasted many seasons and may in fact still be running without opening.

What about the simota mushroom filters.

I stick with my arguement... would you rather suck hot air or suck through a restriction?? If you suck hot are the incooler should sort it out anyway. If you are sucking through a restriction the turbo needs to work harder and in turn makes more more heat.

What about the simota mushroom filters.

Same problem. They just suck up your bling/momey.

Freddie did you IAT go down when you fitted the STD airbox??

stick with my arguement... would you rather suck hot air or suck through a restriction?? If you suck hot are the incooler should sort it out anyway. If you are sucking through a restriction the turbo needs to work harder and in turn makes more more heat.

There is science and proof available = Air temp going up with one degree Celcius, corrosponds to power loss etc. Simple, colder the air in, less work to be done by the rest of your set up. Your stock air box is not the culprit if it comes to restriction. It is rather your AFM item. Yes the pipe after the AFM towards the turbo inlet, need your attention. Check previous posts by Calibrator and the double sided fibre glass flexible pipe. If you dont seal your mushroom or cone = heat sucked up. Maintain stock filter regulary with paper filter. Cheaper, easier etc. No science proofing that oil, foam, and others are that inferior(is that the wright word? = the best). But please dont quote SnS tests. Stock air filter is at least closed and mainly isolated from the worst heat. If you want to use mushroom or cone, go for it. Just try and seal it off. That is the bottom line.

Yes I agree with you if you are planning on modifying your stock air box.

Did you IAT go up or down when you replaced the cone filter with the stock air box.

Freddie did you IAT go down when you fitted the STD airbox??

My stock air flter was off for not longer than an hour - remember I said on a previus thread, that the sx would not dyna properly with the cone? At that stage my unichip was still not fitted to compensate for shortfalls. So basically my stock airbox was never out. I dont have temp sens to measure IAT yet. I am still trying to get hold of one from Toyota as is yours, but with no luck. I need the part number to try again. I once measured the inlet temp with a temp sens(lying around on my bench) temporarily fitted in front of the TB. The turbo leaked out there, which was not good, but I did measure 13-19 deg celcius for some moments. So the stock air box not that relevant to your question. Cant answer that way. Still need to do it properly the way you are doing it wright now.

I have a question for you young dudes out there. Serious! The resonator on the side of the stock air box? What is it doing there? What HAPPENS if you remove it. Once removed, what if any influence will there be on the science of the stock air box? Will we loose valuable air through that round siff or not?

And Pimp, what happened to my scorpion @ the bottom with my signature??? 😮 😮

The resonator on the side of the stock air box? What is it doing there? What HAPPENS if you remove it. Once removed, what if any influence will there be on the science of the airbox?

Ok now I have done HUGE research with this same thing.

the reason it is there is to stop that vacuum noise of the motor. If you remove it on our cars you will hear the turbo sucking the air. Same as on a NA car, you hear the motor sucking, the characteristic sucking sound of a cone filter. The cone filter it self doesnt cause this noise, it is the removal of the sound deading box.

So if you enjoy the sound of the turbo swollowing all the air it can get remove it.

So if you enjoy the sound of the turbo swollowing all the air it can get remove it.

Ok I follow that. Will we loose valuable air while this sucking happens?

ChemCool wrote:

So if you enjoy the sound of the turbo swollowing all the air it can get remove it.

Ok I follow that. Will we loose valuable air while this sucking happens?

No you won't. As long as you seal the hole up properly, once you remove the resonator, it will be fine.

This sounds like some cheap porn forum. 😂

stick with my arguement... would you rather suck hot air or suck through a restriction?? If you suck hot are the incooler should sort it out anyway. If you are sucking through a restriction the turbo needs to work harder and in turn makes more more heat.

Unfortunately your argument is faulty.
The intercooler is only about 70% efficient maybe 80% for a very good one.
If you start the air out 5deg hotter it will still be 5deg hotter after the intercooler.

Reducing the intake air temps will raise power in 2 ways
1st cooler air is denser.
2nd cooler air does lowers the detonation threshhold of your motor allowing for more timing and more boost to be run.

Resonator boxes do reduce induction noise but not by 100% plus they are a huge disruption in the airflow thus causing a restriction. You will have an increase in induction noise without it but not to the point where you will hear the turbo sucking in air as the airbox and air filter still deaden the sound.

Foam filters unless they are gooped thoroughly are an excellent way to destroy your motor in short order.

The Calibrator wrote:

Foam filters unless they are gooped thoroughly are an excellent way to destroy your motor in short order.

I've seen the poor filtering that foam filters provide, yet so many big names produce them (GReddy, HKS, Piper... to name a few) guess they aren't meant for our dusty conditions.

Personally I would go back to a oiled paper filter if I could, its proven to have the best filtering, but it is restrictive to airflow... I guess what one have to do is find a balance... They have proven that these el-cheapo cone filters don't provide such a dramatic increase over paper filters (not oiled paper) its mostly the resonating boxes that cause the restrictions.

What I'm personally gonna do is use a cone filter (decent brand like BMC or K&N) but block it off from any hot air, or use a CDA either way you can't go wrong.

Unfortunately your argument is faulty.
The intercooler is only about 70% efficient maybe 80% for a very good one.
If you start the air out 5deg hotter it will still be 5deg hotter after the intercooler

Yes it is not 100% correct. But if you are sucking through a restriction the turbo will have to work alot harder to get the same air in and inturn creating more heat. So I think think this is much of a muchness.

What I'm personally gonna do is use a cone filter (decent brand like BMC or K&N) but block it off from any hot air, or use a CDA either way you can't go wrong.

I saw a template somewhere on the net that does this exact thing. The drawing was detailed enough to send for laser profiling. Then you just rivet it on and paint. I will try look for it, think it was on the nissansilvia website.

😉

Thats the one 😂 . Only thing with fitting that is you have to paint it, withe means masking up everything in the engine bay just to give it a paint.

I am in the process of fitting a CDA to a S13 and it fits perfectly next to the fuse box and draws air from behind the bumper through the hole left by the Intercooler removal.

What is a CDA 😳 ???