two air intakes??

JoeG07 · Post by **JoeG07** » Mon Aug 13, 2007 8:42 am

don't laugh at what is probably a stupid question, but was just wondering, could i have two air intakeS? currently my K&N sits by the wing with the hose travelling straight into the intake behind the engine, but was just wondering what would happen if i instead plugged it into the old air box? Not really sure why i want to do this, just curious is suppose / maybe work better? no idea lol, the diagram should clear up what i mean:

JarnoVWPolo6N · Post by **JarnoVWPolo6N** » Mon Aug 13, 2007 3:13 pm

No, your engine has only 1 inlet, which is the one where your K&N is on right now (as far as I can see on your drawings). Puttin' one your old airbox and plugging the K&N on that will be the same idea as the system is now, only you will increase the "restriction" of the airflow if you also put in the original filter. Of course you can leave this filter out, but then you will still have a change that the top of the old airbox doesn't close for 100%, and your engine will then suck in "dirty" unfiltered air.

I suggest to just let your K&N sit where it's sitting right now, and don't bother it

Bepe · Post by **Bepe** » Mon Aug 13, 2007 4:35 pm

and to much air can b o ll o x your car engine mate

JarnoVWPolo6N · Post by **JarnoVWPolo6N** » Mon Aug 13, 2007 8:30 pm

Bepe wrote:and to much air can b o ll o x your car engine mate

An engine never has enough air

guess what turbo's where invented for, to get more air in the engine. More air means more performance/power (of course there's much more to be done then to bolt on a huge conical air-filter, but it's the cheapest start of tuning your engine, IF you do it properly of course, that's probably what you are aiming for I guess)

Ian_R · Post by **Ian_R** » Mon Aug 13, 2007 8:45 pm

Bepe wrote:and to much air can b o ll o x your car engine mate

Hee Hee, That made me Chuckle that, nah mate more COLD air the better,

JarnoVWPolo6N wrote:
Bepe wrote:and to much air can b o ll o x your car engine mate
An engine never has enough air guess what turbo's where invented for, to get more air in the engine. More air means more performance/power (of course there's much more to be done then to bolt on a huge conical air-filter, but it's the cheapest start of tuning your engine, IF you do it properly of course, that's probably what you are aiming for I guess)

Nail on Head!

JoeG07 · Post by **JoeG07** » Mon Aug 13, 2007 10:19 pm

theres just like a gay big whole where my air box was now, what if i ran it thru the airbox and left the old filter out? just for looks wise. I know theoretically it may be slightly less efficient but in reality won't make a great deal of difference.

Bepe · Post by **Bepe** » Tue Aug 14, 2007 4:14 pm

look it up mate, to much air for the engine can be bad for an engine, take off you air filter and see what happens! will be the same as having 2 air filters on but not as bad, the air wil be to dense for the engine

Ian_R · Post by **Ian_R** » Tue Aug 14, 2007 4:58 pm

Bepe wrote:look it up mate, to much air for the engine can be bad for an engine, take off you air filter and see what happens! will be the same as having 2 air filters on but not as bad, the air wil be to dense for the engine

Thats what the filter is for mate, hence he said two filters and not none, i'm sure everyone could go round and round on this one, But each to their own opinion.

Bepe · Post by **Bepe** » Tue Aug 14, 2007 5:08 pm

suppose so, but not all cars are made for housin 2 filters

eg ours lol thats why i said it can mess your engine up not being on the right car

warrmr · Post by **warrmr** » Tue Aug 14, 2007 5:25 pm

Bepe wrote:look it up mate, to much air for the engine can be bad for an engine, take off you air filter and see what happens! will be the same as having 2 air filters on but not as bad, the air wil be to dense for the engine

an engine will run quite nice with no airbox on. yes you will trash an engine withe no filter. a mate of mine ran his golf for about 4000 miles with no filter. infact it ran better with no filter on just a pikey sock over the TB.

anyway cold air = dense air
dence air + more fuel = bigger bang
bigger bang = more power

the better an engine breaths the more power it can produce.

the only car i have seen dual inlets on is a G60 or G40. where they remove the boost return and swap it out for a seccond air filter.

some argue its good some argue its bad or makes no difference.

pitstop developments support the boost return mod and dual filters jabba sport dont support it. but this is going off topic in my ramblings.
in answer to the original posters question.
adding the filter to the end of the airbox like you have isnt a bad idea but you will be causing a restriction than the old filter.

to get better airflow out of your mod you plan on doing you need to remove the thermostat from the pipe that goes to the airbox and make the pipe as smooth as you can inside so loose the ribbed bit of the pipe then inside the box you need to remove all the sharp corners and sily bits that cause turbulence. then route the crankcase breather with afilter to a catch tank and vent to the atmophere and then remove the part where the breather plugged into the airbox. seal the lid on with sealant and bobs your uncle you have improved on a vw design.

or you could just buy a BMC CDA and put the new airbox where the old one was (see the DIY thread)

JarnoVWPolo6N · Post by **JarnoVWPolo6N** » Wed Aug 15, 2007 10:39 am

warrmr wrote:
Bepe wrote:look it up mate, to much air for the engine can be bad for an engine, take off you air filter and see what happens! will be the same as having 2 air filters on but not as bad, the air wil be to dense for the engine

an engine will run quite nice with no airbox on. yes you will trash an engine withe no filter. a mate of mine ran his golf for about 4000 miles with no filter. infact it ran better with no filter on just a pikey sock over the TB.

anyway cold air = dense air
dence air + more fuel = bigger bang
bigger bang = more power

the better an engine breaths the more power it can produce.

the only car i have seen dual inlets on is a G60 or G40. where they remove the boost return and swap it out for a seccond air filter.

some argue its good some argue its bad or makes no difference.

pitstop developments support the boost return mod and dual filters jabba sport dont support it. but this is going off topic in my ramblings.
in answer to the original posters question.
adding the filter to the end of the airbox like you have isnt a bad idea but you will be causing a restriction than the old filter.

to get better airflow out of your mod you plan on doing you need to remove the thermostat from the pipe that goes to the airbox and make the pipe as smooth as you can inside so loose the ribbed bit of the pipe then inside the box you need to remove all the sharp corners and sily bits that cause turbulence. then route the crankcase breather with afilter to a catch tank and vent to the atmophere and then remove the part where the breather plugged into the airbox. seal the lid on with sealant and bobs your uncle you have improved on a vw design.

or you could just buy a BMC CDA and put the new airbox where the old one was (see the DIY thread)

AMEN!

I've 2 mates driving without airbox, and both didn't have any trouble with it so far

(a part from the gaines in performance both booked)

JoeG07 · Post by **JoeG07** » Wed Aug 15, 2007 11:24 am

so im better off with just no airbox or filter at all?

PeteJ · Post by **PeteJ** » Wed Aug 15, 2007 2:16 pm

you want an air filter. it prolongs the life of the engine.
you might get more air in without one but you'll get dust/water/general crap in aswell

like jarno said a conical air filter is the most basic performance gain you'll get.

david burton · Post by **david burton** » Wed Aug 15, 2007 2:19 pm

If you're worried about how it looks with a big gap, then I'd put the old airbox back on and plug the pipe from the K&N into it, like you've said.

Make sure that the original filter is removed and also the box is CLEAN. You will also need to NOT put the oil breather into that box, otherwise that'll get into the inlet. that will leave a hole to be bunged up too.

it will make pretty much bugger all difference, the airflow won't be quite as good, but you're probably talking 0.25hp if anything.

warrmr · Post by **warrmr** » Wed Aug 15, 2007 2:34 pm

sory my last post was a tad misleading.

the thing abotu running with no airbox filter was just to prove a point to the guy who said that to much air will f**k the engine.

as the 2 guys said above me you do need a filter as if dust dirt and grit get into the cylinders they will cause havoc with the engine and you will slowly loose compressian as the cylinders get scored.

yes mod the existing airbox like i mentined in teh above post.

loose the Air thermostat in the intake tube.
grind and smooth the internals of the airbox.
route the engine breather to a catch tank.
fill and seal the hole for the breather.