Cone In Oem Box

[Polo GTEye N9]

Gentlemens, after seeing Sams fine Cone In the Box I had to do it. So this afternoon I completed the Cone In Oem Box.

I was seeing intake temps, at idle in excess of 60 Cel on summer days and now when cruising 35 give or take degrees Celsius. but no where near climbing to 60 Cel plus like it was.

So far this CAI and Airbox has only been tested on a short drive round the block and using Scangauge to monitor CAI.

Seems to stubbornly resist going up from 39 Cel temp at idle in the garage, but need more road time and variable conditions to evaluate the modification.

I would appreciate any of those who know to comment on how this modification would effect the ECU programing of air intake etc and is the ECU self learning to adjust to the changes?

Cheers Al

[noone]

I did this a few months back, I've made a number of attempts at custom designs, mainly just to feel for myself how different designs work.

IMO, if you have the PD160, any changes after that will be negligible.

Other things I tried included a custom heat shield, drilling the bottom of the stock box, open Pod on the MAF, custom airbox (open buttom low in the engine bay).

ECU will quickly learn what to do with the changed airflow, but I don't see why you intake temps would change drastically unless you were sucking hot air from the engine bay (some say not that bad, for me, horrible).

Temps will raise when standing after boosting, not much you can do other than upgrade the intercooler

[Polo GTEye N9]

Hi Noone
Thanks for your advice and comments regarding your extensive experience re CAI and modifications.

Yes mine was sucking hot air from the engine bay (I agree and say not that is bad, for me, horrible!)

What i would like to consider insulating the CAI intake and airbox. Any ideas and options?

Cheers Al

[noone]

Yeah, def make sure that no engine bay air sneaks in. I don't profess to be an expert, just have played around with the box a fair bit, trial and error.

If you feel like playing, look up lemmiwinks and add some timing (1 or 2 degrees is noticable), but take it easy and log the results.

[s4mmie]

I don't think there's any real-world gains to be made by insulating the intake system that's there. I mainly did the cone in a box setup to smooth out the intake path, get a nicer induction note and keep the popo happy. It may give me better performance but I'd say only a few kw's at best.

Take a look at the Polo dyno day graphs between Jason and Anthony's. Jason had an open pod and Ant has his sweet enclosed unit --
Brisbane Polo Dyno Day Results - 25 August 2012
I'm not comparing two cars, impossible, but I think it really does highlight the effect IAT's have on performance.

I think efforts would be better spent on better flow and cooling the air after it's been compressed..
Or if you really want to insulate things, I think there's gains worth the effort in thermal wrapping the turbo outlet pipe that runs back across the exhaust manifold...



My 2c.

[Polo GTEye N9]

Well said Sam,
I just had dealings with Qld Transport and really did not want to be defected for a open pod filter.

Today after a short drive and the car got to running temp, lifted the hood and could feel the flexable air pipe from the grill to airbox was hot, as it runs right beside the engine head/block. But the airbox was not hot. May attempt to insulate the flexable pipe.

Right on Sam, as I am looking under the hood, I am thinking 'thermal wrapping the turbo outlet pipe that runs back across the exhaust manifold'? I applied thermal wrap to my WRX and a turbo blanket as well. And I have a small roll of thermal wrap in my spares. Any DYI on doing this?

I have a handheld thermal temp gauge and can do some before and after readings. Have previously used a remote sensor to take real world readings.

Thanks gentlemens, cheers Al