Intake Restrictions tested

[Timbo]

What do people with otherwise stock Pogs think about the intake? Is there an effect, or does it require chip tune to be noticeable?

The increase in richness reflects the ECU intervening to protect the cat. It seems to be a common feature in dyno runs for all the Pogs I've seen.

[awestonvp]

Hey Al, brilliant R&D.

You'd be interested to know that I dynoed my car at the exact same place as you, and got the exact same result (120atw), and that was with a BMC CDA! I also got the dip in AFR (bit too rich) which I'm assuming is a result of the ECU responding to the increased air flow (as well it injecting more fuel).
So this is all consistent. When I installed a FMIC, that's when the AFR sorted itself out (see thread below, includes dyno with CDA, then FMIC).

http://www.vwwatercooled.org.au/newf...ead.php?t=6965

Hey...Neil? I spoke to you on the phone from Volkspower a few weeks back!
Yep pretty good result from that FMIC, I was talking to Dean about it, surprised both of us. Would seem to indicate that the standard intercooler is pretty restrictive too, the only thing we could think of that would result in that jump in power. All good stuff to know!

[GT3]

Ok. ...BUT, when I added a Forge TIP after that, the dyno showed virtually no change (1 kw). Based on your research, I wonder whether the MAF filter has something to do with that?

[shaneth]

And I do notice it on the road - just seems a bit sweeter and stronger from 3000 on up, and more enthusiastic over 5000 which is real nice.

What do people with otherwise stock Pogs think about the intake? Is there an effect, or does it require chip tune to be noticeable?

Timbo Al's words above show exactly how mine feels and im not chipped. I definitely felt it to although i thought it was my imagineation (you know the placebo affect) about it being more enthusiastic over 5000 as al put it but as im not the only one to think this my initial thoughts are confirmed. Im glad that the group buy was worth it for those who joined in.

[GT3]

Well done, the results and R&D on the mod speak for themselves.

[jayzee75]

hi all - were are you sourcing the seat intake from?

[morbo2000]

On my non-chipped car i feel that it doesn't drop off as much above 5000 rpm with the SEAT intake installed. Just feels like it's level now.

[pomme]

hi all - were are you sourcing the seat intake from?

We did a group buy a few months back. Shaneth organised it... got them from the uk i think. He'll have all the details.

[PoloGTi]

Check with Harding Performance they had some too a few months back.

[mitch_gti]

intake restrictions

Ive bought a few things through guy at harding performance

always full of friendly advice, shipping was always fast and products always packaged well out of harms way.

1300 730 949 ask for Guy

[RoSonic]

So, first I got the before dyno. Ambient temp both days was 17c.
I did 3 runs, first peaked at 113, but the ecu was still sorting itself out.
2nd run was 114
3rd run was 115 but fell off after about 6000rpm due to heat soak.
So on the chart (previous post) I used the 2nd run for comparison.

I then fitted the SEAT intake, and after stitches and a blood transfusion, began to test.

You may recall from the first exciting episode, that I had a connection for the vac gauge at the rear of the intake tube, just before the airbox. This is where I connected it for the next set of tests.

With the standard intake I'd had a reading of 28.5.

With the new intake I got 11.2 - pretty pleased!

I then cut away the deflection flap in the intake just behind the grill (see Shanes pics in anther thread).

With this done I got 5.2 !!!! (You were right Shane!)
This was a huge improvement from 28.5

I then measured from the top of the airbox (to get a reading across the filter) and got 7.2 This is pretty damn good for any filter, let alone a stock one. So I dont think there'd be any improvement with an aftermarket filter.

Next was the turbo side of the MAF where I got 23.9
Big frustration, really poorly designed grills in the MAF, but still a hell of a lot better than the 44.7 with the standard inlet.

So, seeing as 44.7 equals about 1.6 psi, with the original intake I was feeding the turbo with air at 13.1psi. With the new inlet, its about 13.9 psi.
And I figure if you're feeding the turbo denser air, its going to do a bit more, despite any limitations of its performance envelope, and this was born out by the dyno results and the Butt-o-meter.

In the future? Well, the MAF grill from a VL Commodore is a much better design and a larger diameter. The grill is called a Flow Straightener, but as far as I know, it's actually a flow enturbulator, that is it creates an even enturbulation of the airflow thru the MAF to even out any disruptions in the flow so that the MAF gets a representative sample of the airflow. And so of course its very restrictive, hence the test figures.

Anyone want to try it...?

bumping up an old thread - but a very good one.

Did any one found a solution for the restriction in the MAF?
Removing those grilles awestonvp was talking about? or changing the maf housing?

[mikepologti]

im guessing the maf housing from the mark 1 tt 225 or the s3 3 inch housing should solve the trick. a bonus is when you upgrade to the k04 you already have one of the useful componants of the transistion.

[VWindahouse]

There's a glass half full comment Mike, something you want to tell us

[h100vw]

im guessing the maf housing from the mark 1 tt 225 or the s3 3 inch housing should solve the trick. a bonus is when you upgrade to the k04 you already have one of the useful componants of the transistion.

If you make that change, you'll need software as the scaling for the airflow will be wrong. The ECU would see a drop in airflow and reduce fuelling accordingly, which wouldn't be good.

You can only fit the larger MAF as part of a complete package.

Gavin

[RoSonic]

But if the MAF sensor itself is changed with the uprated one (not only the housing) there will still be problems with ecu readings ?

And one more question, what other changes are needed to install the 3'' maf when everything else around it is stock?