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Performance Filtration System For R33

nightfighter_r33
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nightfighter_r33 Explorer

nightfighter_r33

Posted
Posted

Hi

Just bought a 1993 R33 with rb25 engine, non turbo

car needs filter and full piping to fuel injection manifold. rather than pay for stock parts i want a performance filtration system

any ideas about what to put on it??

Any good performance shops in melb that will do it for reasonable price??

nightfighter_r33 Explorer

nightfighter_r33

Posted
  • Author
Posted
yes there is...its the snorkel off the front of the box.

even the very best cold air setup would be worth what 3-4hp?

its hardly worth it.

Yea the snorkel. It doesn't look like much cold air could get in between the narrow gap between the bonnet, thats why i thought an intake would be better. Thought it was there just to look good.

Filter. I'm thinking of putting in an apexi power flow, ive heard its a great filter. Any other reccommendations?

XRATED Veteran

XRATED

Posted
Posted

Just put a good pannell filter in the stock box, the run a 2" hose from outside the engine bay to the inlet on the stock box.

That is unless you want the fully hecktic tuner look for your NA! ! ! ! slow liner...

nightfighter_r33 Explorer

nightfighter_r33

Posted
  • Author
Posted
Just put a good pannell filter in the stock box, the run a 2" hose from outside the engine bay to the inlet on the stock box.

That is unless you want the fully hecktic tuner look for your NA! ! ! ! slow liner...

Ah k yea that sounds sweet. Any reccomendations on a good performance panel filter brand?

XRATED Veteran

XRATED

Posted
Posted

Non oil type K&N (oil messes with the air flow meter).

Most of the major brands have drop in replacment washable filters...

Just keep them clean- really clean- all the time. A fresh new filter can get you 6-8kw, a dirty new filter will robb you 10.

66yostagea Grand Master

66yostagea

Posted
Posted

The Stagea guys, me included fit a cold air deflector and use an oiled Red Line or similar. I am fitting a Forward Plenum and have had to go pod. I have fitted a bend and tubing thru the OEM smic hole and the air goes directly to the pod.

XRATED Veteran

XRATED

Posted
Posted
The Stagea guys, me included fit a cold air deflector and use an oiled Red Line or similar. I am fitting a Forward Plenum and have had to go pod. I have fitted a bend and tubing thru the OEM smic hole and the air goes directly to the pod.

Hey ol buddy... Loose the oiled filter. You allready have problems with your air flow meter-

If you must go to a pod, make up a heat shield to box it in.

  • 1 month later...
Duchie Enthusiast

Duchie

Posted
Posted (edited)

The previous owner of mine put in a K&N, so i reckon it probs a good idea to get rid of this.

Btw someone told me that if you remove all those fins inside the air box you might get some more power and a bit of a whining noise.

Edited by Duchie
Touge Kyousou Experienced

Touge Kyousou

Posted
Posted (edited)

Get a HKS mushroom pod, pop that where the factory airbox goes. Make/buy a box and give that box at least one large feed of cold air from under the car or from behind bumper, preferably two.

Will be much better than factory airbox imho. You will gain valuable kw's for an n/a engine and the engine will also rev more freely meaning increased acceleration.

I see many people saying intake is useless, factory airbox etc but it comes down to personal expectations imho. Just consider the person saying it's useless might be someone that expects at least 20rwkw from a mod or something especially if they have a FI car. I love n/a's myself and have noticed even 5wkw difference and given the chance again, would do all the mods again haha.

E.g. On my previous car (v35), alot of people say it's not worth doing intake, just stick with factory box and put in a panel filter and a smoother intake pipe.. i had that for awhile then changed to a HKS cai kit and noticed the difference easily and straight away. Two other passengers did too - Gave very different characterisics.

Edited by Touge Kyousou
Touge Kyousou Experienced

Touge Kyousou

Posted
Posted

I've seen those articles too and i've also seen another where the HKS was rated very high (albeit poor filtration - you can see it too by holding the HKS element up against a light source).

Shortly after seeing those flow test articles, i went out and bought a couple of 3a racing pods to try out against the then installed HKS mushroom (on an FTO). To be honest, i felt the fto was better (slightly) with the HKS mushroom. An inconsistency though was that the HKS had a larger mount whereas i had to use a reducer for the 3a onto the aftermarket big pipe so that may be why the hks felt better.

Using the K&N may affect your maf.. ? I'm unsure if the pods from k&n are wet or dry (panels are wet). My old man has a couple laying around and i might try it on the line. No idea on the apexi ones though!

though on the well covered test by hot 4's (i think?) the HKS mushroom filters sucked at both filtration and flow!

The article recommended K&N, APEXi or 3A Racing (cheap arse brand)

zebra Grand Master

zebra

Posted
Posted
Get a HKS mushroom pod, pop that where the factory airbox goes. Make/buy a box and give that box at least one large feed of cold air from under the car or from behind bumper, preferably two.

Will be much better than factory airbox imho. You will gain valuable kw's for an n/a engine and the engine will also rev more freely meaning increased acceleration.

I see many people saying intake is useless, factory airbox etc but it comes down to personal expectations imho. Just consider the person saying it's useless might be someone that expects at least 20rwkw from a mod or something especially if they have a FI car. I love n/a's myself and have noticed even 5wkw difference and given the chance again, would do all the mods again haha.

E.g. On my previous car (v35), alot of people say it's not worth doing intake, just stick with factory box and put in a panel filter and a smoother intake pipe.. i had that for awhile then changed to a HKS cai kit and noticed the difference easily and straight away. Two other passengers did too - Gave very different characterisics.

Why would you do that?

all it does it suck in hot air which = less power

Touge Kyousou Experienced

Touge Kyousou

Posted
Posted (edited)

How would that suck in hot air ? The pod will be enclosed/sealed from the rest of the engine bay and then there will be at least one preferably two large pipes ramming cold air from the front/underneath of the car into that box/enclosure.

??

Edit - Also if the air is slightly hotter but the resistance to flow is much less, you should still have on road gains being the engine will rev easier but now that's really cutting it thin lol.

Edited by Touge Kyousou
RWG Enthusiast

RWG

Posted
Posted

Hi all,

From what i have read in these threads it seems the K&N filter is not a good filter to use and the reason being is due to the filter spray which they recomend to be used on their filters.What happens if you don't use the spray and if you do only use it lightly.Do you guys think this could be a plan or would i be wasting my time, i hope not as i've just ordered a K&N panel filter and it should be here after the weekend? I have a V35 250GT. :)

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