Preliminary comparo: K04.16 / K04.RS6 / K04.24

Mike2kS4 · 08-23-2005, 03:39 PM

I now am running extrude-honed and clearanced RS6 hybrids, I previously had K24 and K16 hybrids. Here's how I rated them in various categories.

Driveability: RS6-9 K16-7 K24-6 The Larger Hybrids lose points because of the massive midrange surge they require to make power and a lessened on/off throttle response compared to the RS6.

Power: K24:8 K16:7 RS6:7 The K24 is the king-daddy of top-end power but the RS6 and K16 are only a tad behind in boost levels that I'm willing to run. I'm running the RS6's at ~20psi now and am very happy with the numbers logged. The K24 seems to want ludicrous boost numbers (over 25#) that I'm unwilling to run on stock internals and head gaskets.

Low end: 3 way tie at this point. The RS6 responds quicker but the other two make more boost at lower turbine and engine RPM's. K24 and K16 act almost identically below 5000rpm the RS6 isn't a low end boost-hog but responds much quicker and can make # in the 20's at around 3k rpm.

Other considerations: The K24 and K16 make some funny hooting noises when cold. It's the price you pay for such a large wheel in a small housing. The RS6 is sounds like stock K04's.

I'll revise my opinions as I slowly ratchet up the boost on the RS6 'brids past the current 20# at redline to ~22#, but I can say I'm very happy and think they're a great choice for someone after a bit more power and OE driveability.

Snow Trooper · 08-23-2005, 03:41 PM

what all is done to the turbos to make them fit our cars

Mike2kS4 · 08-23-2005, 03:46 PM

Funny thing is: It's not a true hybrid. The RS6 uses the RSK04 turbine

Snow Trooper · 08-23-2005, 03:50 PM

so what is changed on them, dimensionaly bigger housing?

Mike2kS4 · 08-23-2005, 03:52 PM

The Extrude hone on the hot-side takes care of it. The cold side could use the smaller housing due to the smaller displacement and higher boost levels our engine runs to make similar power.

Snow Trooper · 08-23-2005, 03:55 PM

KOpork · 08-23-2005, 03:55 PM

Mike2kS4 · 08-23-2005, 03:56 PM

I wish my camera was charged when I did the install, they're beautiful.

Bauer · 08-23-2005, 04:01 PM

I agree about the low end response as well....additionally, they work very well with the shorter gearing I have in my car. IMO the combo is very, very noice.... lots of good power and still very street-able.

Snow Trooper · 08-23-2005, 04:01 PM

most likely my lack of comprehension today... are they a straight rs6 turbo or does he mod them? i ask because you said "made". i was about to get some other turbos to tide me over until my garret goodness is ready and these sound very appealing, any flow numbers to compare with straight ko4s

08-23-2005, 03:39 PM	#1
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,104	Preliminary comparo: K04.16 / K04.RS6 / K04.24 I now am running extrude-honed and clearanced RS6 hybrids, I previously had K24 and K16 hybrids. Here's how I rated them in various categories. Driveability: RS6-9 K16-7 K24-6 The Larger Hybrids lose points because of the massive midrange surge they require to make power and a lessened on/off throttle response compared to the RS6. Power: K24:8 K16:7 RS6:7 The K24 is the king-daddy of top-end power but the RS6 and K16 are only a tad behind in boost levels that I'm willing to run. I'm running the RS6's at ~20psi now and am very happy with the numbers logged. The K24 seems to want ludicrous boost numbers (over 25#) that I'm unwilling to run on stock internals and head gaskets. Low end: 3 way tie at this point. The RS6 responds quicker but the other two make more boost at lower turbine and engine RPM's. K24 and K16 act almost identically below 5000rpm the RS6 isn't a low end boost-hog but responds much quicker and can make # in the 20's at around 3k rpm. Other considerations: The K24 and K16 make some funny hooting noises when cold. It's the price you pay for such a large wheel in a small housing. The RS6 is sounds like stock K04's. I'll revise my opinions as I slowly ratchet up the boost on the RS6 'brids past the current 20# at redline to ~22#, but I can say I'm very happy and think they're a great choice for someone after a bit more power and OE driveability. __________________ 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.

08-23-2005, 03:41 PM	#2
Snow Trooper AudiWorld Super User Account #: 71496 Join Date: Mar 2004 Posts: 5,694	i am behind the learning curve on the rs6 set up what all is done to the turbos to make them fit our cars __________________ ___________________________ \|.....Overnight.......................\| .\|\ \|.......German Parts..................l..\|\|'\|";,___. \|_..._..._____________======'l=\|_\|_\|....,] "(@)'(@)""'''''''''''''"''''''"/(@)(@)**** "(@) North American Distributor for Rosten Performance products. Old Picture poster.

08-23-2005, 03:46 PM	#3
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,104	It's the same as any other K04 install... Funny thing is: It's not a true hybrid. The RS6 uses the RSK04 turbine __________________ 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.

08-23-2005, 03:50 PM	#4
Snow Trooper AudiWorld Super User Account #: 71496 Join Date: Mar 2004 Posts: 5,694	wow, really, this whole time i thought they were something different so what is changed on them, dimensionaly bigger housing? __________________ ___________________________ \|.....Overnight.......................\| .\|\ \|.......German Parts..................l..\|\|'\|";,___. \|_..._..._____________======'l=\|_\|_\|....,] "(@)'(@)""'''''''''''''"''''''"/(@)(@)**** "(@) North American Distributor for Rosten Performance products. Old Picture poster.

08-23-2005, 03:52 PM	#5
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,104	True RS6 turbos use slightly larger housings... The Extrude hone on the hot-side takes care of it. The cold side could use the smaller housing due to the smaller displacement and higher boost levels our engine runs to make similar power. __________________ 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.

08-23-2005, 03:55 PM	#6
Snow Trooper AudiWorld Super User Account #: 71496 Join Date: Mar 2004 Posts: 5,694	thanks for the info, i assume you got them from jacob __________________ ___________________________ \|.....Overnight.......................\| .\|\ \|.......German Parts..................l..\|\|'\|";,___. \|_..._..._____________======'l=\|_\|_\|....,] "(@)'(@)""'''''''''''''"''''''"/(@)(@)**** "(@) North American Distributor for Rosten Performance products. Old Picture poster.

08-23-2005, 03:55 PM	#7
KOpork Member Account #: 22238 Join Date: Jul 2001 Posts: 16,423	When you get the car up and running right again let me know. :-) __________________ Silver S4 for sale RIP OWK 2000 Audi S4 piggified stg3 2000 Audi S4 stock 2008 Triumph Daytona 674 SE

08-23-2005, 03:56 PM	#8
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,104	Yep. Jacob made them.... I wish my camera was charged when I did the install, they're beautiful. __________________ 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.

08-23-2005, 04:01 PM	#9
Bauer Senior Member Account #: 64403 Join Date: Oct 2003 Posts: 6,638	I can't compare since I have not owned the others..... but I too am very happy with my RS6 hybrids.. I agree about the low end response as well....additionally, they work very well with the shorter gearing I have in my car. IMO the combo is very, very noice.... lots of good power and still very street-able. __________________ Bauer 07 A4 2.0T quattro - STaSIS Ohlins, STaSIS Alcons, STaSIS 4:1 center diff, GIAC, AWE Exhaust, AMS SS. 03 RS6 She will be missed 01 S8 01 S4 Custom STaSIS built 6 speed w/shorter gearing, STaSIS LSD, STaSIS center diff, STaSIS MotorSport Ohlins, STaSIS Alcon 6 pot, 14" rotors, STASIS rear Track Sport brakes, front and rear STaSIS control arms, Revolver Cams, plain KO4's....for now;^), custom exhaust, AWE fueling kit, X-1 Intake, RS4 IC's, 6 puck CM clutch, LW flywheel, Recaro's, RS4 bumper etc, etc, etc.... (now Chip Herr's...and being properly driven) "My stomach still gets queezy thinking about the drive in Ben's car in the rain. When I think back to the moment I have to concentrate so as to not crap my pants", guy who got a ride in my car with Jason driving (via IM to Jason)

08-23-2005, 04:01 PM	#10
Snow Trooper AudiWorld Super User Account #: 71496 Join Date: Mar 2004 Posts: 5,694	ok now i am confused most likely my lack of comprehension today... are they a straight rs6 turbo or does he mod them? i ask because you said "made". i was about to get some other turbos to tide me over until my garret goodness is ready and these sound very appealing, any flow numbers to compare with straight ko4s __________________ ___________________________ \|.....Overnight.......................\| .\|\ \|.......German Parts..................l..\|\|'\|";,___. \|_..._..._____________======'l=\|_\|_\|....,] "(@)'(@)""'''''''''''''"''''''"/(@)(@)**** "(@) North American Distributor for Rosten Performance products. Old Picture poster.

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