Did some testing in sub 50F temps tonight to see how much temperature really affects K04 performance

PSmalls::DoggieStyle · 10-19-2005, 09:01 PM

Like I've said before, it seems like K03 performance is affected big time by temperature changes while K04 cars seem much more consistent. The results of this testing would support that.

Note: ~1/4 tank of 94 octane, ~900' above sea level, 45F outside.

~22.5 PSI peak tapering to at least ~20 PSI, maybe lower....

Lots o' correction down low, might pull timing back to default for next testing session (currently +1.5 degrees FWIW)....

At first glance, seems on the rich side. I did another run right after and narrowband sensors were reading ~.10-.15 lower, though.

About damn time I logged IATs. FWIW, *very* similar #s on 2nd run less than 2 minutes later....

How do these IATs compare to others with RS4/AWE SMICs? TIA.

Mike2kS4 · 10-19-2005, 09:11 PM

You're a victim of the usual 6500rpm K04 dropoff, but that helps your timing. 85deg peak IAT's! I need to take my car out when it gets that cold here

FWIW: the new injectors are working out well, got some part throttle stuff to work out, but I think my new O2's will take care of that. Oh, and I'm going to try to fill-up with 100 tomorrow... just for the STFU factor

Mike2kS4 · 10-19-2005, 09:15 PM

PSmalls::DoggieStyle · 10-19-2005, 09:17 PM

I'm just tapering way too damn much. All the other K04 MAF data I see doesn't show a taper like mine does....most just level off at 6500 and hold that to red at the very least.

Sweet, looking forward to some data collection...as always. FWIW, was just talking to SLPRS4 today about picking up some 100 octane to test on my car.

Mike2kS4 · 10-19-2005, 09:22 PM

It's worth a shot, no downside there. I don't know whether it will help peak power, but it will probably prevent it from falling off so abruptly.

FWIW, most K04 logs I've seen lately seem to drop rapidly after 6500.

Bahn S4 · 10-19-2005, 09:29 PM

2000s4biturbo::Uli · 10-19-2005, 09:47 PM

the end of the pull i was at ~ 125.

it was 73 when i logged though, but even if you add 23 degrees to your starting temp you are still ~20 degrees colder!!! i need me some ic's

3.5 is very nice man.
*thumbs up*

PSmalls::DoggieStyle · 10-19-2005, 09:53 PM

2000s4biturbo::Uli · 10-19-2005, 10:01 PM

c'mon... you know you wanna.

just a little 30 shot. that is, if youve got the minerals ;P

PSmalls::DoggieStyle · 10-19-2005, 10:03 PM

10-19-2005, 09:01 PM	#1
PSmalls::DoggieStyle Elder Member Account #: 69223 Join Date: Jan 2004 Posts: 30,285	Did some testing in sub 50F temps tonight to see how much temperature really affects K04 performance Like I've said before, it seems like K03 performance is affected big time by temperature changes while K04 cars seem much more consistent. The results of this testing would support that. Note: ~1/4 tank of 94 octane, ~900' above sea level, 45F outside. ~22.5 PSI peak tapering to at least ~20 PSI, maybe lower.... Lots o' correction down low, might pull timing back to default for next testing session (currently +1.5 degrees FWIW).... At first glance, seems on the rich side. I did another run right after and narrowband sensors were reading ~.10-.15 lower, though. About damn time I logged IATs. FWIW, very similar #s on 2nd run less than 2 minutes later.... How do these IATs compare to others with RS4/AWE SMICs? TIA.

10-19-2005, 09:11 PM	#2
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,105	As usual, looks good JD... You're a victim of the usual 6500rpm K04 dropoff, but that helps your timing. 85deg peak IAT's! I need to take my car out when it gets that cold here FWIW: the new injectors are working out well, got some part throttle stuff to work out, but I think my new O2's will take care of that. Oh, and I'm going to try to fill-up with 100 tomorrow... just for the STFU factor __________________ 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.

10-19-2005, 09:15 PM	#3
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,105	And on the IAT's, my delta is normally 20degF on a FATS run. __________________ 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.

10-19-2005, 09:17 PM	#4
PSmalls::DoggieStyle Elder Member Account #: 69223 Join Date: Jan 2004 Posts: 30,285	I'm on the fence re: having Piggie tighten them there wg actuators. I'm just tapering way too damn much. All the other K04 MAF data I see doesn't show a taper like mine does....most just level off at 6500 and hold that to red at the very least. Sweet, looking forward to some data collection...as always. FWIW, was just talking to SLPRS4 today about picking up some 100 octane to test on my car.

10-19-2005, 09:22 PM	#5
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,105	You can go 5mm or so on the actuators with no worry of boost creep... It's worth a shot, no downside there. I don't know whether it will help peak power, but it will probably prevent it from falling off so abruptly. FWIW, most K04 logs I've seen lately seem to drop rapidly after 6500. __________________ 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.

10-19-2005, 09:29 PM	#6
Bahn S4 Elder Member Account #: 53141 Join Date: Mar 2003 Posts: 14,626	Woh, how low into the 2's you think you'll go? __________________ ------------------- Bahn S4's non-fried non-breaded wing recipe Diet and Exercise: Paleo + Crossfit

10-19-2005, 09:47 PM	#7
2000s4biturbo::Uli Elder Member Account #: 65572 Join Date: Nov 2003 Posts: 14,240	nice. crazy to think that on stock ic's my starting temp in the log was ~100 the end of the pull i was at ~ 125. it was 73 when i logged though, but even if you add 23 degrees to your starting temp you are still ~20 degrees colder!!! i need me some ic's 3.5 is very nice man. thumbs up __________________ MY BABIES a.k.a. CARS you want the best for your car? tell him i sent you. FATS database NOT stock ;^P nogaro 6mt my00, casa 6mt my01.5

10-19-2005, 09:53 PM	#8
PSmalls::DoggieStyle Elder Member Account #: 69223 Join Date: Jan 2004 Posts: 30,285	Don't give a pooh about peak power, but more top end wouldn't hurt. ;-)

10-19-2005, 10:01 PM	#9
2000s4biturbo::Uli Elder Member Account #: 65572 Join Date: Nov 2003 Posts: 14,240	a dab'l do ya ;) c'mon... you know you wanna. just a little 30 shot. that is, if youve got the minerals ;P __________________ MY BABIES a.k.a. CARS you want the best for your car? tell him i sent you. FATS database NOT stock ;^P nogaro 6mt my00, casa 6mt my01.5

10-19-2005, 10:03 PM	#10
PSmalls::DoggieStyle Elder Member Account #: 69223 Join Date: Jan 2004 Posts: 30,285	2nd pull, less than 2 minutes later, started at ~60 and peaked at ~90. ICs rock. :)

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