Stock versus IPP versus RS4 Intercoolers - Part I - The Bench Test

LI-S4 · 10-11-2006, 01:46 PM

This is the third installment of the Intercooler comparison...

Part I of the test...IPP Intercoolers versus Stock Intercoolers ! PartI ~ The Bench Test

Part II of the test...IPP Intercoolers versus Stock Intercoolers ! Part II ~ Cruise, In-Car Road Tests

Again, a special thanks to Jeff "Flyboy" for making sense of all this data...I defer to him for answers to your questions; and Sal from Elite Motorsport in Medford NY for helping with the installs. If you are in the NY Metro area and need any Audi/V-Dub work done, Sal is the man; And, a special special thanks to box_of_partS4 who stepped up and loaned me his APR RS4 IC hoses when no-one else could get them to us in time.

RS4 Intercooler Bench Test

Objective - Determine how the RS4 intercooler responds to heating and cooling under conditions similar to what the stock and IPP intercoolers were tested under.

Procedure - The same as for the stock and IPP intercoolers.

Configuration - The same as for the stock and IPP IC test.

Constraints - The same as for the stock and IPP IC test.

Results - The chart below shows the results for all three intercoolers. The RS4 intercoolers rose in temperature at the same rate as the IPP intercoolers, less than the stock IC's, but reached a steady state temperature 10 degrees Fahrenheit higher than the IPP intercoolers. Once the fan was turned on the RS4 intercoolers cooled more rapidly than the stock or IPP intercoolers. The steady state cool temperature of the RS4 IC's was 1 degree warmer than the IPP intercoolers.

The next chart shows the rate of cooling once the fan was turned on and the intercooler began to cool down. Over the first 30 second measurement interval the RS4 IC's cooled most rapidly; the IPP IC's cooled the slowest. (Note that the stock intercoolers did not begin to cool immediately, as the IPP and RS4 IC's did.)

Over the next 30 second measurement interval the trend remained the same. By 90 seconds all three IC's were cooling at an equivalent rate.

The affect of the different rates of cooling shows up on the first chart. Both the RS4 and IPP intercooler begin to show a bottoming out in the rate of cooling around 120F. Both IC's are close to their steady state temperature at this point. In cooling to 120F the RS4 intercooler drops 75F in 120 seconds. The IPP intercooler drops 65F in 150 seconds. By more rapidly cooling, the RS4 IC's produces a greater total temperature drop over shorter period of time as compared to the IPP intercoolers.

=============================================
Part I of the test...IPP Intercoolers versus Stock Intercoolers ! PartI ~ The Bench Test

Part II of the test...IPP Intercoolers versus Stock Intercoolers ! Part II ~ Cruise, In-Car Road Tests

Part IV of the test....Stock versus IPP versus RS4 Intercoolers - Part II - The Road Tests

Hal_TT::CBP · 10-11-2006, 01:52 PM

Global Motorsports · 10-11-2006, 01:53 PM

how about pressure drops?

LI-S4 · 10-11-2006, 01:59 PM

However, there would have to be the added variable of a different car.. Still Stage III minus, on APR v5.0 93 software, but on K04/16's. A non-issue on the bench test...but possibly significant on the road tests...

Also, the weather is getting pretty cool here in the NE so the window might be closing...literally

Mihnea · 10-11-2006, 02:04 PM

SchagenWagen · 10-11-2006, 02:07 PM

it takes also LONGER for them to cool down. It is a fine balance and considering that no one tested the flow yet (pressure drop) I am still not sold to a large core IC using stock S4 tubing

PSmalls::AnalRetentiveNumbNut · 10-11-2006, 02:10 PM

OCA::DIY Motorsports · 10-11-2006, 02:14 PM

It looks to me like the IPP drops temp faster than the others. It goes from 180 to 120 in 180sec(est.). What are the two verticle bold lines? Is that the fan "on" "off" times?

Please help me understand. Are the colors miss marked? The red(IPP?) looks like it cools faster than the green (RS4).

Am I reading this wrong?

jtbenson · 10-11-2006, 02:31 PM

This forum and its many regular contributors is a real asset for b5 owners; thank you all!

QuiKKK Silver S4 · 10-11-2006, 03:14 PM

The factory engineers knew what they were doing when they decided to build a better intercooler for the K04...

#1
#2

10-11-2006, 01:53 PM	#3
Global Motorsports Basic Sponsor Account #: 64565 Join Date: Oct 2003 Posts: 1,203	nice, are you gonna do AWE's and evolution racewerks as well? :) how about pressure drops? __________________ __________________________________________________ Ryne O'Donnell Audi Brand Specialist Ryne@GMGRacing.com The West Coast Leader in Performance Products! Full Race Spec Setups Available 2006 Time Attack Overall Winner (GMG WC GT3) 2006 Time Attack Limited Winner (GMG GT2) Now Located in our New 15,000+ Sq. Ft. Facility in Orange County, across the street from Porsche Motorsport North America. 3210 S. Shannon St. Santa Ana, CA 92704 (714) 432-1582 www.gmgracing.com

10-11-2006, 01:59 PM	#4
LI-S4 AudiWorld Super User Account #: 24785 Join Date: Sep 2001 Posts: 18,085	AWE's are planned... However, there would have to be the added variable of a different car.. Still Stage III minus, on APR v5.0 93 software, but on K04/16's. A non-issue on the bench test...but possibly significant on the road tests... Also, the weather is getting pretty cool here in the NE so the window might be closing...literally __________________ "My wheel bolts require more torque than your Honda makes..." Valentine One Remote Display My Wheel Repair NASA Style The Unofficial AW Buyer / Seller Feedback Thread The nOOb FAQ ~ LI-S4 Style Everything I write is my opinion. You are free to adopt it or discard it. If I say it, it's because I believe it to be 100% true...That is all. ...THE FIRST MOD SHOULD BE DRIVING SCHOOL - O.W.K.

10-11-2006, 02:04 PM	#5
Mihnea Junior Member Account #: 25793 Join Date: Sep 2001 Posts: 1,239	Pressure drop data??? __________________ RIP O.W. Kenobi 1998 Audi S4 2.7T, Stage 3+ -FMIC, ported/polished/clearanced K04s -custom intake pipes, tubular manifolds -custom dual 2.75" turbo back exhaust -lowered compression -RS4 transmission 511.5 crank HP/505 crank ft/lbs on DynoDynamics (391wHP) 2.8 FATS average on 92.5 octane Status: awaiting patiently stage 4 a.k.a. RS6 turbos and mo' boost.

10-11-2006, 02:07 PM	#6
SchagenWagen Junior Member Account #: 44371 Join Date: Oct 2002 Posts: 1,361	It was said once that large core IC absorb heat more than lesser one (RS4), but it takes also LONGER for them to cool down. It is a fine balance and considering that no one tested the flow yet (pressure drop) I am still not sold to a large core IC using stock S4 tubing

10-11-2006, 02:10 PM	#7
PSmalls::AnalRetentiveNumbNut Member Account #: 112331 Join Date: Aug 2006 Posts: 2,690	2nd, anxiously awaiting to see how AWEs stack up.

10-11-2006, 01:46 PM	#1
LI-S4 AudiWorld Super User Account #: 24785 Join Date: Sep 2001 Posts: 18,085	Stock versus IPP versus RS4 Intercoolers - Part I - The Bench Test This is the third installment of the Intercooler comparison... Part I of the test...IPP Intercoolers versus Stock Intercoolers ! PartI ~ The Bench Test Part II of the test...IPP Intercoolers versus Stock Intercoolers ! Part II ~ Cruise, In-Car Road Tests Again, a special thanks to Jeff "Flyboy" for making sense of all this data...I defer to him for answers to your questions; and Sal from Elite Motorsport in Medford NY for helping with the installs. If you are in the NY Metro area and need any Audi/V-Dub work done, Sal is the man; And, a special special thanks to box_of_partS4 who stepped up and loaned me his APR RS4 IC hoses when no-one else could get them to us in time. RS4 Intercooler Bench Test Objective - Determine how the RS4 intercooler responds to heating and cooling under conditions similar to what the stock and IPP intercoolers were tested under. Procedure - The same as for the stock and IPP intercoolers. Configuration - The same as for the stock and IPP IC test. Constraints - The same as for the stock and IPP IC test. Results - The chart below shows the results for all three intercoolers. The RS4 intercoolers rose in temperature at the same rate as the IPP intercoolers, less than the stock IC's, but reached a steady state temperature 10 degrees Fahrenheit higher than the IPP intercoolers. Once the fan was turned on the RS4 intercoolers cooled more rapidly than the stock or IPP intercoolers. The steady state cool temperature of the RS4 IC's was 1 degree warmer than the IPP intercoolers. The next chart shows the rate of cooling once the fan was turned on and the intercooler began to cool down. Over the first 30 second measurement interval the RS4 IC's cooled most rapidly; the IPP IC's cooled the slowest. (Note that the stock intercoolers did not begin to cool immediately, as the IPP and RS4 IC's did.) Over the next 30 second measurement interval the trend remained the same. By 90 seconds all three IC's were cooling at an equivalent rate. The affect of the different rates of cooling shows up on the first chart. Both the RS4 and IPP intercooler begin to show a bottoming out in the rate of cooling around 120F. Both IC's are close to their steady state temperature at this point. In cooling to 120F the RS4 intercooler drops 75F in 120 seconds. The IPP intercooler drops 65F in 150 seconds. By more rapidly cooling, the RS4 IC's produces a greater total temperature drop over shorter period of time as compared to the IPP intercoolers. ============================================= Part I of the test...IPP Intercoolers versus Stock Intercoolers ! PartI ~ The Bench Test Part II of the test...IPP Intercoolers versus Stock Intercoolers ! Part II ~ Cruise, In-Car Road Tests Part IV of the test....Stock versus IPP versus RS4 Intercoolers - Part II - The Road Tests __________________ "My wheel bolts require more torque than your Honda makes..." Valentine One Remote Display My Wheel Repair NASA Style The Unofficial AW Buyer / Seller Feedback Thread The nOOb FAQ ~ LI-S4 Style Everything I write is my opinion. You are free to adopt it or discard it. If I say it, it's because I believe it to be 100% true...That is all. ...THE FIRST MOD SHOULD BE DRIVING SCHOOL - O.W.K.

10-11-2006, 01:52 PM	#2
Hal_TT::CBP Senior Member Account #: 3027 Join Date: Mar 2000 Posts: 9,679	Thx again Michael and Jeff, this continues to be an interesting read. __________________ Hal. Whoops... I wanna ride... APR Stg3 (and then some) Sold.

10-11-2006, 02:14 PM	#8
OCA::DIY Motorsports Member Account #: 60276 Join Date: Aug 2003 Posts: 5,655	I'm a graph noob. Help me understand. It looks to me like the IPP drops temp faster than the others. It goes from 180 to 120 in 180sec(est.). What are the two verticle bold lines? Is that the fan "on" "off" times? Please help me understand. Are the colors miss marked? The red(IPP?) looks like it cools faster than the green (RS4). Am I reading this wrong? __________________ SUPPORT STEM CELL RESEARCH! "There are (shop)whores that do provide a valuable service. However, you appear as a whore with no orifices, therefore all you accomplish is space occupation." --Kartman "Those who would give up ESSENTIAL Liberty to purchase a little temporary safety, deserve NEITHER liberty nor safety" Benjamin Franklin

10-11-2006, 02:31 PM	#9
jtbenson New Member Account #: 86660 Join Date: Jan 2005 Posts: 161	agreed; another excellent contribution. This forum and its many regular contributors is a real asset for b5 owners; thank you all!

10-11-2006, 03:14 PM	#10
QuiKKK Silver S4 New Member Account #: 111644 Join Date: Jul 2006 Posts: 57	RS4 ICs are the bomb. They power the two quickest full interior K04 or K04 hybrid S4s in the country The factory engineers knew what they were doing when they decided to build a better intercooler for the K04... #1 #2

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