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Custom air intake system for the mongrel?

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I have got thinking about air intakes on my Fabia....

At the moment I have a bare pd160 intake pointing toward the airflow coming in, which I believe to be OK as there's enough airflow around/past the intercooler pipe, and it seems breathing isn't an issue (that I know of....)

I was wondering whether it might be a good idea to do away with my airbox completely, and mod a decent bit of pipe to go all the way from my MAF, and down into the front left wing, and for a cone filter to sit right behind the panel next to the foglight. This panel would be "mongrelled" of course so the cone sat in direct airflow.

Any thoughts? :) Any plans like this have been rejected before due to my battery being in the way - Now not an issue. ;)

your going to do it anyway though if it even remotely gives you any gain :D

Plus there no sure way of finding out apart form doing it

  • Author
your going to do it anyway though if it even remotely gives you any gain :D

Plus there no sure way of finding out apart form doing it

Well, I just wondered what people from the 1.8T world thought as they all generally have intakes down in the wings, compared to the normal TDI grille intake attaching.

Maybe would have been a good idea before going to Allards:rolleyes:

I'd just put a far bigger pipe into the airbox.

  • Author
Maybe would have been a good idea

Forget the rest of that - Would it be good compared to the cupra intake system, full stop - no questions asked?

That would sit exactly where my K&N gen II sat in my Focus RS. That position does work well (it did on my FRS at least! ) I would prob source a fabricated alloy pipe to link the air filter to the maf as it needs to keep the air flow smooth as poss.

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That would sit exactly where my K&N gen II sat in my Focus RS. That position does work well (it did on my FRS at least! ) I would prob source a fabricated alloy pipe to link the air filter to the maf as it needs to keep the air flow smooth as poss.

Got me thinking carbonio there....

would an Octy CAI pyhsically fit a furby?

If so try a fleabay kit

No matter how big a pipe connect to the airbox, from there one, the airbox is the restriction, so freeing that up is a good way.

Jason, the CAI your looking into, is the best way to go.

would an Octy CAI pyhsically fit a furby?

If so try a fleabay kit

Would need two bends IMO, one to straighten the intake from the angle of the MAF to the angle of the wing and then another bend to drop the filter behind the front bumper.

Remember with CAI's you want a filter that can stand up to the elements - no good putting a cotton-gauze on there without some kind of prefilter and expect to clean them both often.

What about a bonnet intake instead.

What about a bonnet intake instead.

Risky, if you want to have the filter anywhere near.

Would'nt the cone filter get wet from being nearer the road surface??

I've got one, and most of the CAI's sit infront of the light, and down. You would think they would get wet. But they don't. They sit as high as the door level in most cases.... and again, slightly higher in other.....

If your car was submerged in water that is.. to the door seal's high, I would be more worried about other components.

Droplets and splashes of water, don't make any effect.

Would need two bends IMO, one to straighten the intake from the angle of the MAF to the angle of the wing and then another bend to drop the filter behind the front bumper.

remember, you loose 5% of the flow capacity of your tube for evey 90 degree bend it has

It'd be an idea to actually calculate how many cubic feet per min or litres per min you would need at full WOT. Then try to figure out the optimal cross-section of tubing.

You've already figured the likely coolest air intake position.

How about taking a grinder to the slam panel and making a much larger straight pipe with a gentle curve, round airfilter inside, no airbox. May get a bit of a ram-air effect as well as the free-flow characteristics of a round filter (K&N?). Insulate the air tubing with ? a survival blanket ? old mylar car sunshade to keep the air as cool as possible on its way to the BF turbo...

my 2p worth

HTH

Bas

i was under the impression that any mod to the intake system other than a panel filter and PD160 intake pipe caused the MAF to fail.

remember, you loose 5% of the flow capacity of your tube for evey 90 degree bend it has

There's no other way though, unless taking a Dremel to the bonnet or side of the wing is an option. Plus the loss would be negligible compared to the increase in airflow over the standard intake system.

It'd be an idea to actually calculate how many cubic feet per min or litres per min you would need at full WOT. Then try to figure out the optimal cross-section of tubing.

You've already figured the likely coolest air intake position.

How about taking a grinder to the slam panel and making a much larger straight pipe with a gentle curve, round airfilter inside, no airbox. May get a bit of a ram-air effect as well as the free-flow characteristics of a round filter (K&N?). Insulate the air tubing with ? a survival blanket ? old mylar car sunshade to keep the air as cool as possible on its way to the BF turbo...

my 2p worth

HTH

Bas

I'd do something similar:

Free flowing cone filter to replace the airbox, then a heat shield all around the cone which becomes a sealed chamber once the bonnet is closed.

Air is fed from the existing location in the slam panel through a port in the side of the heat shield.

Slam panel and front grille are modified so that the air intake can be extended out of the front of the car beyond the grille.

i was under the impression that any mod to the intake system other than a panel filter and PD160 intake pipe caused the MAF to fail.

Depends..... Vibration and grit/contamination are the things that might kill the MAF. You have to make sure that it's properly supported and not flapping around.

J.

I'll ask a fundamental question - based on your compressor map, what cfm figure do you need for best performance? ie have you already got enough air in there or not? Or is this a question about air density rather than flow rates?

  • Author
I'll ask a fundamental question - based on your compressor map, what cfm figure do you need for best performance? ie have you already got enough air in there or not? Or is this a question about air density rather than flow rates?

Not got a clue, but after being told my car is smoking a lot still, my little brain says power = fuel x air. fuel not being burned = smoke = not enough air getting in. I never thought air would be an issue as I expect my VT5 sucks harder than Pamela Anderson (not that I'd know how well she does it....) so would get air in well enough anyway.

Thinking of how the normal intake goes in the box, 90 degrees upwards, then 90 degrees to the left to the intake. A CAI would sit in the bottom of the bumper and there'd be only a couple of small bends, especially if I used a CAI pipe and then a flexible pipe down to the filter. I'm SO unknowledgable about intakes of this style it's untrue. Never looked into it before.

Would'nt the cone filter get wet from being nearer the road surface??

exactly what i was going to say then mate

mate of mine his mate has got a subaru impreza with his cone filter mounted to the left on the FMIC and that has caused him a few problems i believe

Does that mean your PD160 air intake would become redundant?

Let me know if it does :)

Not got a clue, but after being told my car is smoking a lot still, my little brain says power = fuel x air. fuel not being burned = smoke = not enough air getting in.

smoke is because of incomplete combustion, i doubt if it's got anything to do with the amount of air going in. anything you can do to improve the effeciency of the combustion chamber would help this:)

cylinder head porting??

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