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Aftermarket Air Filters

Tech Talk for Nissan owners.

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JK
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Aftermarket Air Filters

Post by JK »

I am looking at fitting an aftermarket or filter to the GQ and would like to know what is the best filter.

Thinking something along the lines of a foam filter e.g Finer Filter, K&N etc.
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Re: Aftermarket Air Filters

Post by Singo17 »

DirtPigs wrote:I am looking at fitting an aftermarket or filter to the GQ and would like to know what is the best filter.

Thinking something along the lines of a foam filter e.g Finer Filter, K&N etc.


K&N are a Cotton based filter which is reusable. From all reports K&N's are superior. I had a finer filter in my Hilux worked great easy to clean re oil no sweat.....
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JK
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Post by JK »

Thanks Singo. Are there any other makes of filter that you could recommend for the GQ?
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Post by DAZZ »

I have just put a K&N pannel filter in my Frontera and it is a good thing....
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Post by big red »

i chucked the prefilter out and just used a finer filter in the main.
had no trouble for the 280,000 km i had up on the 89 gq diesel.
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Post by Carl Coight »

you actually ran the car 280 000km without the pre cleaner?
i'm just tossing up weather or not to get rid of mine.
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JK
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Post by JK »

Great, thanks guys. :)
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Post by Bris_GU »

Look at CFM airflow through the different filters. The foam (from ads) flows similar to OE paper when clean but severely restricted when dusty.

K&N flows in excess of OE paper when clean and similar when needing a clean. A mate also runs a K&N in his 91 TD42T GQ patrol, has done for a few years now and loves it. His is a highly tuned Turbo diesel intercooled running 10 or 16 psi with fuel pump mods etc to keep fuelling up at max boost, and he has no airflow problems.

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Post by big red »

coighty, i reckon it was a bit of overkill to have a main and pre filters.
a lot of guys found that two filters restricted the airflow too much for their turbo'd 4.2's.
i fitted a piece of hose over the centre section of the vertical prefilter to create a water trap, didn't get any water in there anyway.
i had intended to replace the prefilter housing and piping with a hose straight from the snorkel to main filter but sold the truck before it happened.
i drowned the motor on cape york when water leaked into the prefilter housing so i was going to get rid of it.
luckily no damage occured to the motor.
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