Follow up to MarkP's EPL Dyno IAT comparison. (Edit)

Flyboy · 05-18-2006, 08:30 AM

As Mark had pointed out in his post where he compared the IAT's from the EPL dyno day, the different boost levels would affect the IAT sensor readings. One way to mitigate that affect is to determine the approximate turbo compressor outlet temperature based upon the MAP sensor boost value. From this and the IAT reading it's possible to estimate the intercooler efficiency.

There are some assumptions involved, so the results still are subject to differences between the vehicles, but making the analysis this way does provide a more honest comparison between the different intercoolers.

The picture shows the results of this further evaluation.

Note: The legend on this chart is different from Mark's due to my use of the data in a different spreadsheet. The car owner's name is included for cross reference with Mark's chart.

MarkP's post

DAP@EPL · 05-18-2006, 08:40 AM

Audeye A6 · 05-18-2006, 08:45 AM

Godfather | Jay · 05-18-2006, 08:46 AM

Pat-SoCal · 05-18-2006, 08:47 AM

Can you include the link to MarkP's logs which include the color-code legend?

Mike2kS4 · 05-18-2006, 09:12 AM

DAP@EPL · 05-18-2006, 09:16 AM

Dunno which IC would win out there.

-Dave Pramanik

Pat-SoCal · 05-18-2006, 09:22 AM

Which setup/car was that?

Hal_TT::CBP · 05-18-2006, 09:24 AM

More metal certainly = a better heat sink in this case.

Mike2kS4 · 05-18-2006, 09:24 AM

I doubt it would be anything significant.

05-18-2006, 08:30 AM	#1
Flyboy AudiWorld Super User Account #: 4736 Join Date: Apr 2000 Posts: 3,504	Follow up to MarkP's EPL Dyno IAT comparison. (Edit) As Mark had pointed out in his post where he compared the IAT's from the EPL dyno day, the different boost levels would affect the IAT sensor readings. One way to mitigate that affect is to determine the approximate turbo compressor outlet temperature based upon the MAP sensor boost value. From this and the IAT reading it's possible to estimate the intercooler efficiency. There are some assumptions involved, so the results still are subject to differences between the vehicles, but making the analysis this way does provide a more honest comparison between the different intercoolers. The picture shows the results of this further evaluation. Note: The legend on this chart is different from Mark's due to my use of the data in a different spreadsheet. The car owner's name is included for cross reference with Mark's chart. MarkP's post __________________ <url="http://www.myaudis4.com/index.htm"> <img]http://www.myaudis4.com/sig.gif</img></url> <url="http://www.motorists.org/">National Motorists Association</url>

05-18-2006, 08:40 AM	#2
DAP@EPL Audiworld Sponsor Account #: 6924 Join Date: Jun 2000 Posts: 19,701	Nice work. __________________

05-18-2006, 08:45 AM	#3
Audeye A6 AudiWorld Super User Account #: 67177 Join Date: Dec 2003 Posts: 4,246	Nice. __________________ 2001 2.7T / 6spd / Cold Weather Pkg. / Premium Pkg. EPL Custom Tuned Stage III / 93 Oct Bilstein-HD / B&G Sport Coils / H-Sports KO4/997 Hybrids, EV14 Inj, ASP MAF Vast Kevlar Clutch,RS4 PP & Throwout bearing Autospeed Trans. stabilizer bar AWE/McNeil Downpipes/graphite rapped AWE/McNeil Intercoolers APR exhaust/snub mount Port/Polished/Ceramic coat exh. mani's JHM short shifter Hardwired/stealth V1

05-18-2006, 08:46 AM	#4
Godfather \| Jay AudiWorld Super User Account #: 99226 Join Date: Oct 2005 Posts: 3,267	Bravo __________________ F#% the new format and jacked up, truncated archives. Go to quattr0w0rld... "Sleeper" - a B5 S4 Tribute* "Stages: A Mod Addiction" Piano Black Beltline Trim Install * Clear corner DIY tips ER IC install pics/notes * DIY camera mount My stage 3+ mod list * More vids: 0-60, drag strip, etc

05-18-2006, 08:47 AM	#5
Pat-SoCal Elder Member Account #: 16079 Join Date: Feb 2001 Posts: 11,588	Interesting... Can you include the link to MarkP's logs which include the color-code legend? __________________

05-18-2006, 09:12 AM	#6
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,105	Nice. It's good to see the AWE's large core has merit at higher boost levels. __________________ 2002 S4 Avant, 6spd. Bone stock. <a href="http://www.autospeed.us"> </a> Caveat: Any advice I express regarding potential tuning and such is purely informational. If your knowledge and abilities are not up to the task, no amount of advice can assist.

05-18-2006, 09:16 AM	#7
DAP@EPL Audiworld Sponsor Account #: 6924 Join Date: Jun 2000 Posts: 19,701	Yeah, AWE's do seem to show some advantage. This doesn't factor in pressure drop though. Dunno which IC would win out there. -Dave Pramanik __________________

05-18-2006, 09:22 AM	#8
Pat-SoCal Elder Member Account #: 16079 Join Date: Feb 2001 Posts: 11,588	2nd. Interesting that the one RS4 IC car starts out w/ a much different base. Which setup/car was that? __________________

05-18-2006, 09:24 AM	#9
Hal_TT::CBP Senior Member Account #: 3027 Join Date: Mar 2000 Posts: 9,679	That was my next question - lets see flow characteristics from 6500-7200 between the two. More metal certainly = a better heat sink in this case. __________________ Hal. Whoops... I wanna ride... APR Stg3 (and then some) Sold.

05-18-2006, 09:24 AM	#10
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,105	Dunno either... I doubt it would be anything significant. __________________ 2002 S4 Avant, 6spd. Bone stock. <a href="http://www.autospeed.us"> </a> Caveat: Any advice I express regarding potential tuning and such is purely informational. If your knowledge and abilities are not up to the task, no amount of advice can assist.

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