UK-POLOS.NET - THE VW Polo Forum

hi all, i want to look in to getting an induction kit for my polo gti and need a bit of advice

im interested in the piperX viper induction kit, which i know is the same one as from the IV Golf gti 1.8t, however, whet do i do with the secondary air part of the standard setup, im huessing its going to also need a filter on it, as i dont think the viper had anywhere on it to couple it up to

so where do i get one? any advice appreciated here

i had also thought about the neuspeed p-flo as well as just an open cone filter of some sort, but i would prefer something like the viper thats enclosed and will only draw in cold air

whats everyone on here using? and how does it shape up compared to standard setup, cost, benifits, noise etc

cheers

jeff

i have had an open filter for ages and i tried my standard air box a few months back and it felt sluggish! i would prefer an enclosed one but couldnt find any that would fit? so if you find one that fits ok with no sill bends let me in on it cos i tried loads a stuff, noise is better with a cone but thats personal preference i suppose, dont really notice any heat problems though most of its down to your intercooler, though a cold feed would help!

jeff just get a mini oil breather and fit it on

green do one thats fits spot on!

but tbh it doesnt really matter as it only drawers in air to help the exhaust breathe when you first start up! and thts it

vw said to me it wont make any difference!

whitegtipolo wrote:i have had an open filter for ages and i tried my standard air box a few months back and it felt sluggish! i would prefer an enclosed one but couldnt find any that would fit? so if you find one that fits ok with no sill bends let me in on it cos i tried loads a stuff, noise is better with a cone but thats personal preference i suppose, dont really notice any heat problems though most of its down to your intercooler, though a cold feed would help!

did you try jabbasport for an enclosed one sure they will make one if they dont do one

Jeff - why dont you mod the airbox.. its been done for years by the Audi TT boys with good results...

Take airbox off and smooth out the internals, cut all the "baffles" out, etc.

Then use a hole saw and to make some 2" holes on the bottom side/ cold side of the airbox (you know away from engine)...

This way when you put back it looks stock.

The TT boys did loads and loads of tests using this setup and airflow is definately improved - they even noticed that its not the paper filter at fault - it can flow plenty of air but restricted by the box and its intake pipe.

I did measure everything on mine for before and after and there was a definate increase in torque and power - not much - I think it went from approx 207 to 212 bhp... cant find the Vag-com logs else i would have posted them.

I recently had a report from a TT 1.8T customer who physically tried standard airbox vs open cone on a rolling road back to back and LOST a couple of BHP with open cone - might be the heat bulid up at the rolling road - but the customer was a little surprised.

It gets bloody hot in the POLO engine bay - I know I try to work on mine this week - but I get to work and have to leave bonnet open for an hour so its cold enough to work on - theres just too much hot air in there to have a cone bolted to the airflow meter. ( I can see why there was that fashion a few years ago of everyone having louvred (spelling?) bonnets.

Theres no point in making loads and loads of flow through the filter because it just gets stuck at the MAF anyway - yet another big restriction

Noise - Car will sound more grumbly first thing as the secondary air makes some noise - and you get to hear it !

You hear the DV a little more aswell...

Box mod Just an idea for you Jeff - might be worth you trying after all this is FREE and We all know you like being creative

J

I fitted a MK4 Golf Induction (came with breather filter) a couple of weeks ago. Cant notice a difference preformance wise as it would be very hard to notice 2-3bhp difference IMO. The only difference is there is a bit more roar off the car and u can hear the DV goin and thats basically it. Gonna do the drilling the airbox mod tho at the weekend if it drys up!

Same one as this guy:

yeah i didnt like the idea of a cone being exposed either, so how was enclosed forced induction bear up, like the piper cross viper that i mentioned

does anyone have a setup like this

the reason i ask is now on stage 2 with all the mods on the car ran at 2 hp less at peak than it did with the same mods on stage 1, so is stage 2 a bum deal, well not really, in the mid range between 2000 rpm and 5750 rpm, my cars output was 51 bhp higher and 70 ft/lb torque higher when comparing the revs and power output between stage 1 and 2

the operater jim cotton, founder of awesome gti said the car is not able to breath well enough to produce more peak power at the top end, as the pd160 intake, green cotton replacement element and standard airbox are too restrictive, and we need to look in to changing this somehow

hence my recent questions on induction

dude you remember my black one?

with a open end filter it made about 190odd bhp and about 210 torque

but

with enclosed air box, it made about 180odd but about 220 torque!

so basically, what gain - is what you lose!

mod the box

but the MAF is VERY BIG restriction after this....

free everything up and then the standard MAF can run out of range...and I reckon this must be at around 240-250bhp which then requires re-scaling of the MAF signals (custom software)

bigger MAF is a good idea but again you need custom software for this..

lol... modding is fun how one thing leads to another...

nothing wrong with open end cones i love mine, always have done, its just personal preference get one and try it i have also de restricted my maf meter too, removed all that plastic gauze so its nice and free

Is it not possible to fit the MAF from the 225 (Cupra R / TT ) engine to the Polo using modified tubing behind the (modified) original aibox which will allow more airflow through the MAF. I can't see the PD160 pipe itself being much improved upon but maybe a slightly larger airbox running a slightly bigger panel filter with wider tubing behind the airbox would allow a much better flow of air. Then next step - KO4. Muchos airflow.

Anyone got some pics of a modded air box? I have just got myself a K&N and was going to drill the air box when I fitted it. Cheers

i have ordered the pipercross viper setup for my car, so look forward to fitting it some time in the week and see what increases it gives along with the intercooler on thursday at forge, hope i get it on in time haha

Jeff GTi wrote:i have ordered the pipercross viper setup for my car, so look forward to fitting it some time in the week and see what increases it gives along with the intercooler on thursday at forge, hope i get it on in time haha

will it fit?

well seing as the kit is designed for the 6L ibiza 1.8t, that has the same airbox as ours, feeds the air in through the same air intake and has everything in the same place im certainly thinking it will, only time will tell though