VTDA on the 3.2....>>>
11-16-2007, 08:08 AM
#11
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From crew219's link above...>
"Interesting that as the revs go up, with the factory airbox, the temperature actually increases (27deg C to 30 degC) by the end of the pull. With the VTDA, the temperature drastically decreased (31degC @ ~20mph to 23degC at ~75mph). At idle, intake air temperatures were as high as 39 deg C. Up top, the MAF measurements were consistently 220 with the intake vs. 206 factory
More G/sec generally = more HP..
More G/sec generally = more HP..
11-16-2007, 03:24 PM
#12
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Yeah - after reading the info in the post - I felt like I was missing something when it came to the
conclusions. Colder intake temps as rpms rise and more g/s on the Maf reading both would indicate power improvements.
11-18-2007, 04:06 AM
#13
Keep in mind that the factory was done on a used filter.
A filter which isn't even utilized to it's fullest . . .
<img src="http://i11.photobucket.com/albums/a193/yaminator/filter.jpg">
The final 1/3rd of the filter is most likely used in the upper RPMs when a flapper opens in the airbox and draws air from directly above the DSG gearbox. That directly correlates with the increase in intake temps as the RPMs climb.
As mentoned before, HPA seems to feel that a high flow filter replacement and cutting out the divider in the airbox and opening up an inlet at the bottom of the airbox is sufficient for their turbo'd 3.2s.
For reference, I was able to see a 4-7g/s gain when switching from a clean stock paper filter to a new foam filter on my 2.0t. Given that this individual seems to have a "special" 3.2 factory filter with an additional layer, it wouldn't be far fetched to believe that he would see significant gains simply from a drop-in high flow filter over his 20k old paper filter.
Dave
<img src="http://i11.photobucket.com/albums/a193/yaminator/filter.jpg">
The final 1/3rd of the filter is most likely used in the upper RPMs when a flapper opens in the airbox and draws air from directly above the DSG gearbox. That directly correlates with the increase in intake temps as the RPMs climb.
As mentoned before, HPA seems to feel that a high flow filter replacement and cutting out the divider in the airbox and opening up an inlet at the bottom of the airbox is sufficient for their turbo'd 3.2s.
For reference, I was able to see a 4-7g/s gain when switching from a clean stock paper filter to a new foam filter on my 2.0t. Given that this individual seems to have a "special" 3.2 factory filter with an additional layer, it wouldn't be far fetched to believe that he would see significant gains simply from a drop-in high flow filter over his 20k old paper filter.
Dave
11-18-2007, 04:07 AM
#14
That is on a 1.8t with a different chassis and airflow that is designed to be guided into that
region. Simply put, the air which you are drawing from simply doesn't normally get any airflow. The lower grilles are completely blocked off and the airdam guides the air down.
The vag-com "Butt Dyno" is fairly accurate and uses the deceleration of the vehicle while coasting to improve on block 120 data. I wouldn't count it out so far.
Dave
The vag-com "Butt Dyno" is fairly accurate and uses the deceleration of the vehicle while coasting to improve on block 120 data. I wouldn't count it out so far.
Dave
11-19-2007, 03:37 AM
#15
"Yam" updated his VTDA with fresh air feeds and a heatshield
<ul><li><a href="http://forums.fourtitude.com/zerothread?id=3514413&uid=217998&postid=43 468602#43468602">http://forums.fourtitude.com/zerothread?id=3514413&uid=217998&postid=43 468602#43468602</a</li></ul>
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