Cone type air filter on turbo inlet - Defender Source
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Old June 8th, 2016, 09:56 AM
Naplm00
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Cone type air filter on turbo inlet

My air filter pulls air directly from the engine bay. And the element is gnarly and ready to be replaced.

Before I replace it, had anyone run a cone style (k&n type) air filter directly on the turbo inlet mouth? Ive had one previously on a 94 supra single turbo convert and it worked well but wanted to see peoples experience here.

I'd probably plumb the oil vapor air return line from the cyclone apparatus to a catch can as well.


Thoughts?
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  #2  
Old June 8th, 2016, 10:03 AM
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you want to pull the coldest possible air so intake should be as far from turbo as you can route it
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Old June 8th, 2016, 10:13 AM
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Quote:
Originally Posted by Uncle Douglas View Post
you want to pull the coldest possible air so intake should be as far from turbo as you can route it
Yea currently with the setup I have the air is being pulled from about 12 inches away. I'm hemming and hawing over the seemingly negligible difference in heat from these two locations. Do you think that the increase in heat comparatively would outweigh the better filtration (when dry) and the increase in airflow?


Edit: forgot to mention I have a full width intercooler on the truck
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Old June 8th, 2016, 10:19 AM
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It depends on if you need extra airflow.
Just extra air will drop the EGTs a little, if that is a concern.
If not, you can adjust the fuel to match the extra air flow.

You'll get better performance by using a manual boost controller and cranking up the fuel some.
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Old June 8th, 2016, 10:27 AM
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Quote:
Originally Posted by rdavisinva View Post
It depends on if you need extra airflow.
Just extra air will drop the EGTs a little, if that is a concern.
If not, you can adjust the fuel to match the extra air flow.

You'll get better performance by using a manual boost controller and cranking up the fuel some.
The chance at Lower egt would be better, since I'm am planning another pump tune in the near futur after wheel and tires go on. Currently running with minimal smoke and lots of power on a 1.2 and 33s with a boost pin, tweaked timing/fuel and a full. Width intercooler.

I'm getting the exhaust redone locally as right now it dumps under the passenger door sans muffler.
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  #6  
Old June 9th, 2016, 10:55 AM
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Quote:
Originally Posted by Naplm00 View Post
Yea currently with the setup I have the air is being pulled from about 12 inches away. I'm hemming and hawing over the seemingly negligible difference in heat from these two locations. Do you think that the increase in heat comparatively would outweigh the better filtration (when dry) and the increase in airflow?


Edit: forgot to mention I have a full width intercooler on the truck
Throw a filter on the turbo. I built turbo cars for years, yea cooler air helps some, especially with cars that have a mass air flow sensor pre turbo (as the intake air temp sensor is usually on the MAF). This truck has none of that. 12" isn't going to change much.

The turbo is going to heat the air up, and the intercooler SHOULD cool it. You also have a big intercooler to help with that. Same thing as your Supra.
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Old June 9th, 2016, 12:04 PM
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Thx for all the insight folks, ill give it a go and report back.
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Old June 9th, 2016, 12:56 PM
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Located mine behind the passenger side headlight. Seems like a decent spot for cooler air. In full disclosure, I don't have many miles on this app yet but so far so good.
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  #9  
Old June 9th, 2016, 01:11 PM
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Originally Posted by 1of40 View Post
Located mine behind the passenger side headlight. Seems like a decent spot for cooler air. In full disclosure, I don't have many miles on this app yet but so far so good.
That's what my dad had done on his, I put mine straight on the turbo, but it's a defender so I don't know if that makes a difference heat wise, i haven't noticed anything negative yet.
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Old June 9th, 2016, 01:15 PM
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Quote:
Originally Posted by PabloCocito View Post
That's what my dad had done on his, I put mine straight on the turbo, but it's a defender so I don't know if that makes a difference heat wise, i haven't noticed anything negative yet.
So I can be lazy. What size was the inlet on your defender engine 200tdi?
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Old June 9th, 2016, 01:21 PM
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Originally Posted by Naplm00 View Post
So I can be lazy. What size was the inlet on your defender engine 200tdi?
The filter is 3" and way too big, the adapter I bought was from 3 to 2 1/2 and it fits about right.
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Old June 9th, 2016, 03:02 PM
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Stock pipes are 2".
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Old June 9th, 2016, 03:14 PM
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Quote:
Originally Posted by rdavisinva View Post
Stock pipes are 2".
Turbo inlet is 2.5". Intercooler piping is 2".
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Old June 9th, 2016, 06:38 PM
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I heard to avoid kn filters if you go off-roading. They will not filter as well and pooch the turbo. If you stay on road go for it as the cfm increase makes a big difference...exhaust and filter = ~ 10-15 hp gain
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Old June 10th, 2016, 07:28 AM
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Originally Posted by Arcadeus View Post
I heard to avoid kn filters if you go off-roading. They will not filter as well and pooch the turbo. If you stay on road go for it as the cfm increase makes a big difference...exhaust and filter = ~ 10-15 hp gain
I've also heard from those that race off road KN makes perfect fine filters for off road use. Probably depends which filter.
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Old June 10th, 2016, 08:36 AM
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Quote:
Originally Posted by 1of40 View Post
Located mine behind the passenger side headlight. Seems like a decent spot for cooler air. In full disclosure, I don't have many miles on this app yet but so far so good.
Where did you plumb the oil vapor return line to?
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  #17  
Old June 10th, 2016, 10:21 AM
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Originally Posted by Naplm00 View Post
Where did you plumb the oil vapor return line to?
Haven't decided what direction I'm going on this yet. I need to do some more research re the do's and don't, why and why nots.
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  #18  
Old June 10th, 2016, 10:26 AM
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Originally Posted by 1of40 View Post
Haven't decided what direction I'm going on this yet. I need to do some more research re the do's and don't, why and why nots.
So right now, just venting to the ground? Also I picked up a filter wrap for mine that is going in. They are waterproof and act as a pre-filter keeping the mesh/foam dry.
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Old June 10th, 2016, 03:22 PM
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Quote:
Originally Posted by Naplm00 View Post
So right now, just venting to the ground? Also I picked up a filter wrap for mine that is going in. They are waterproof and act as a pre-filter keeping the mesh/foam dry.
Yes, at the moment its pointed to the topside of chassis. last I looked there was no accumulation there yet. I'd read one guy plumbed his into the chassis which is creative.

Can you post a link to where you got your pre-filter?
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  #20  
Old June 10th, 2016, 03:42 PM
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Filterwears Pre Filter K301K Fits K N Air Filter RF 1037 Filter Wrap | eBay


Send them a message with your part number or dimensions and they should point you to the correct version. It's about 1/2 price of the kn version.
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