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3" Forced Air Intake - Review

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Well, seeing as I refuse to pay £80+ for a pd160 intake I decided that I wanted to find a cheaper alternative. It just so happened a mate of mine the previous week had made his on 3" intake for his RS4. So on that basis I decided to employ his skills and make me one while I was on holiday. As you should know, the standard intake is terrible and is not a forced intake. So my friend gutted the trumpet etc and made me a fibreglass forced intake with 3" hosing.

Here's how it looks:

3inchintake2.jpg

3inchintake.jpg

Bit of a pikey mod, BUT it has made a significant difference while on the move. From a standstill not really any different as it's still manually pulling the air in, but from a rolling start especially on higher speed roads it's a massive difference! Pulls much harder now, and well worth the £16 total it has cost me!

Just thought I'd stick this thread up just to give my review of a cheap and I feel, effective mod.

Next thing I' interested in trying is either a panel filter, or cone in a box. Not sure either of those would make anymore difference though...

i want one :)

Well, seeing as I refuse to pay £80+ for a pd160 intake I decided that I wanted to find a cheaper alternative. It just so happened a mate of mine the previous week had made his on 3" intake for his RS4. So on that basis I decided to employ his skills and make me one while I was on holiday. As you should know, the standard intake is terrible and is not a forced intake. So my friend gutted the trumpet etc and made me a fibreglass forced intake with 3" hosing.

Here's how it looks:

3inchintake2.jpg

3inchintake.jpg

Bit of a pikey mod, BUT it has made a significant difference while on the move. From a standstill not really any different as it's still manually pulling the air in, but from a rolling start especially on higher speed roads it's a massive difference! Pulls much harder now, and well worth the £16 total it has cost me!

Just thought I'd stick this thread up just to give my review of a cheap and I feel, effective mod.

Next thing I' interested in trying is either a panel filter, or cone in a box. Not sure either of those would make anymore difference though...

Mate - been there, done that ;)

I've got a 100mm alu pipe going to mine. Just wasn't gonna spend ridiculous amounts on something that does nothing but duct air.

Works a treat :D

Looks good but have you lost the bit of plastic that helps stop water getting in the airbox.

Water in the airbox?

I'll be honest... I've had mine like this all year. And i've never had an issue even in pouring rain...

I'd probably wager that in a NA car the air isn't under as much back pressure so any water vapour would probably sit at the bottom of the box though.

How is it forced?

Forced induction is either turbo or supercharger

Vrs is turbo so you already have 'forced induction'

Plastic flap is to stop snow!!

Not really req.

I would have thought gravity would do a good enough job at the bottom of the airbox of keeping water down and out - if not the filter itself if it ever got that far...

  • Author

How is it forced?

Forced induction is either turbo or supercharger

Vrs is turbo so you already have 'forced induction'

Plastic flap is to stop snow!!

Not really req.

How is it forced? Well if you look at the standard intake hose where the flap thing is half the air goes into the engine bay not 'forcing' all the air into the intake. The new intake forces ALL the air into the hosing down to the airbox, therefore none is wasted.

The flap is pointless and anybody who says its there to stop water and snow in this country is talking rubbish. It may well work in other countries where there is alot of rain/flooding or snow but here no. If the flap was so important other manufacturers would be fitting them also.

ps. I know about forced induction being turbo/supercharged that's why I called it a forced air intake.

Edited by Matt.

Next thing I' interested in trying is either a panel filter, or cone in a box. Not sure either of those would make anymore difference though...

Have a read of this before going down the panel filter route.

  • Author

Have a read of this before going down the panel filter route.

I had a quick read of that the other day, I've got to be honest I can't really see an aftermarket filter making THAT much difference to performance to be honest, so will probably be a waste of money buying one :)

After market filter can cause blade damage to turbo

Best sticking with oem filters every 10k

  • Author

Standard filter it is then!

I assume your car was mapped with probably lots of boost and overfueling?

Reason I say that is on a standard map the intake pipe creates no restriction. I believe this because I measured the MAF before and after and no increase was found.

If on a mapped car it was causing restriction then you probably would get a increase in MAF reading. However the ecu won't increase fuel to compensate as diesels don't work like that. So I assume you were over fuelling to get the benefit?

Another tip

That coolant hose thats resting against your new ducting tie it out of the way as it will rub through in no time

  • Author

No idea to be honest, I had the car mapped with standard intake on. However it has today gone back for a map tweak as I felt it didn't feel much different and I'm just about to go pick it up. I will say it hardly smoked at all and it's on a Revo stage 1 map...which I always believed was quite a smoky map?

  • Author

Another tip

That coolant hose thats resting against your new ducting tie it out of the way as it will rub through in no time

Yes I never noticed that until I looked at the pictures, we are going to cover the hosing and bottom half of the airbox in heat resistant tape also...every little helps :)

So you still on REVO? Or you changed as you can't tweak REVO diesel maps.

  • Author

Oh right, I did think that was the case but someone said to me they can check the settings and adjust if need be? Yes I'm still on a Revo, but maybe not for much longer.

Where have you had your car mapped mate?

  • Author

It was mapped at Lincoln VW Specialists mate.

Looks good but struggle to see how it can make any "real" difference. I even doubt the pd160 makes any real life improvement. Although iv still got one. Personally i think if anyone notices a big improvement then its just physcilogical

Well on mine...

The change from the piddly little pipe to my ducting made a huge difference personally. Like driving a different car with it in.

But then again the pipe it had to start with was... Tiiiiiiiiiiiny.

Well on mine...

The change from the piddly little pipe to my ducting made a huge difference personally. Like driving a different car with it in.

But then again the pipe it had to start with was... Tiiiiiiiiiiiny.

But yours doesn't have a turbo shoving air into the engine does it, so you're comparing apples with oranges which is dumb.

This is also true.

On forced induction setups, I would have thought that it would make a slight difference - more due to the direct cold feed going in than anything else.

Yes I never noticed that until I looked at the pictures, we are going to cover the hosing and bottom half of the airbox in heat resistant tape also...every little helps :)

This has to be a troll since it's the most retarded thing I've ever heard.

Why are you trying to apply N/A petrol tuning tricks to a turbo diesel, you could have an air inlet pipe reaching all way the to the north pole and it won't affect your air density at all once your INTERCOOLER is heatsoaked.

Personally I shop at Sainsburys, so no, every little does not help!

Nice execution of a flawed idea though.

Edit: Are you're using the same 75mm air inlet pipe as your mates RS4 which must be making at least twice the power of yours?

Edited by sepulchrave

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