Intake Restrictions tested

[GT3]

6kw is a good result - air flow (and air temp) isn't great on a dyno, so you could expect even better performance out on the open road.

[awestonvp]

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...?

[mitch_gti]

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

lmfao !!!! i can relate to this with the seat intake. Very tight fit and i cut my hand.


Great thread.

Also, you obviously have done more to your car because even 114 kw is about 20 kw more than standard ATW.

I thought the APR flash was supposed to give 125kw atw?

[awestonvp]

lmfao !!!! i can relate to this with the seat intake. Very tight fit and i cut my hand.


Great thread.

Also, you obviously have done more to your car because even 114 kw is about 20 kw more than standard ATW.

I thought the APR flash was supposed to give 125kw atw?

Yep, its flashed. I put the difference from "supposed to" down to different dynos, different conditions. My main interest was the relative figures with the changes rather than the actual figures.

best Al

[DaveMack]

You beauty, Awestonvp. Knew it felt better after fitted the Seat intake. (Sorry 'bout the bleedin' knuckles ... but worth it, I think.)

Dave

[Eddy]

let me know what you plan on getting i may get you to get 2

Or even 3, Eddy.

Dave

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.

Hoyhoy.
Well boys having problems in finding a panel filter to suit without changing the air box itself, at this time.
So after the efforts & results that Al has come up with I will no longer be chasing this mod.

P.S. Well done Al, its appreciated by heaps, thankyou.

[Eddy]

if there is like a secret hush group buy here, i'll be in

Hoyhoy.
Don't worry, theres no secret hush group buy at this stage.

[shaneth]

You beauty, Awestonvp. Knew it felt better after fitted the Seat intake. (Sorry 'bout the bleedin' knuckles ... but worth it, I think.)

Dave

Your not sorry you didnt get any lol

[Timbo]

Great effort. Thanks for going to all that (bloody ) work and sharing the results with us.

[DaveMack]

Your not sorry you didnt get any lol

True, Shane. Thought I'd be a little magnanimous.

Dave

[ryan_GTI]

6kwatw from just changing the intake is crazy! or have i missed something...

thanks Al for going through all the trouble, now it has given many pplz peace of mind in changing the intake, and its definately on my 'to do' list now.

[DaveMack]

When you think about it ... it makes sense. If Seat are the recognised 'sports' arm of VAG ... they wouldn't have changed the intake for no good reason. You only have to look at some of the engine specs for their use of the 1.8T engine to see that they are trying to get the most out of it.

Dave

[awestonvp]

Postscript

Thanks guys, glad to be of help. I was hoping it would show some improvement on the dyno, and was really stoked when the result came up!!
I was also a bit concerned whether it would affect the air/fuel, maybe lean it out a bit up top, but it was actually a tiny bit richer over 5000 so its all good.

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.

best Al

[GT3]

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/newforum/upload/showthread.php?t=6965

[Funkdancer]

Over the top awesome stuff Al - thanks so much for the work you put into this, and some totally great results as well!

My own knuckle wounds are still showing....that was indeed a bad mutha to put in. I'm going to have to go back in and cut out that flap now, I actually left it as my hands were too fouled up at that point.