please help me interpret my dyno results (faloff in power above 6k)

dorifto88 · 06-30-2015, 06:40 PM

-roughly 64k miles
-inspection 2 done last summer (~7k ago)
-rogue x pipe, cpi headers
-frank smith tune
-pulleys
-really, really hot today in sacramento (ask finnegan!)

im not (too) concerned about the (what i perceive to be a) lack of power, more concerned about the power after 6k. any thoughts would be greatly appreciated.

Michael

edit- granted the operator let off the throttle early but you can clearly see the curve was not going to recover and magically go above 250 whp

mfanatic325 · 06-30-2015, 06:51 PM

I think it very well could've gone up higher still, and the operator should rev all the way up to fuel cut. All in all, I'm not sure why the dynos for this car have been on the lower side, since I recall your car being peppier than mine when they both were NA with slight bolt-ons :/

seank · 07-01-2015, 12:19 AM

Do you usually go to the dyno when it is 107 degrees?

Most likely a weak fuel pump, assuming his foot was in it to redline.

pokeybritches · 07-01-2015, 08:02 AM

AFR still looks ok though. He should run it up to 8k rpm, unless he noticed a significant power loss or other issue at WOT.

mfanatic325 · 07-01-2015, 10:43 AM

BTW Mike, what section1 and mufflers are you currently running? Not that I think they're the issue here, but ughh...your car should be making more power

Calichase · 07-01-2015, 03:48 PM

Our stock ecus apparently stop fueling at 6500 according to Frank at ttfs.

Edit- seems that was stated above, and you have a tune which would eliminate that

rjahl · 07-01-2015, 06:13 PM

You should check out the Dyno thread from the E90 forum, lots of good information from a post started by Axiom.

http://www.e90post.com/forums/showthread.php?t=916863

What car is this? I or SI ? Either case the ECU does not cut fuel at 6500 RPM. Soft limiters start to kick in a bit higher.

3002 tii · 07-04-2015, 11:09 PM

Quote:

Originally Posted by rjahl

You should check out the Dyno thread from the E90 forum, lots of good information from a post started by Axiom.

http://www.e90post.com/forums/showthread.php?t=916863

What car is this? I or SI ? Either case the ECU does not cut fuel at 6500 RPM. Soft limiters start to kick in a bit higher.

OP has S54/M

06-30-2015, 06:40 PM	#1
dorifto88 Major 48 Rep 1,135 Posts Drives: 88 Nissan Pathfinder Join Date: May 2010 Location: cowtown iTrader: (4)	please help me interpret my dyno results (faloff in power above 6k) -roughly 64k miles -inspection 2 done last summer (~7k ago) -rogue x pipe, cpi headers -frank smith tune -pulleys -really, really hot today in sacramento (ask finnegan!) im not (too) concerned about the (what i perceive to be a) lack of power, more concerned about the power after 6k. any thoughts would be greatly appreciated. Michael edit- granted the operator let off the throttle early but you can clearly see the curve was not going to recover and magically go above 250 whp
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06-30-2015, 06:51 PM	#2
mfanatic325 ///M-fanatic 193 Rep 3,885 Posts Drives: '01 911 Turbo Join Date: Oct 2007 Location: Cupertino, CA. iTrader: (23)	I think it very well could've gone up higher still, and the operator should rev all the way up to fuel cut. All in all, I'm not sure why the dynos for this car have been on the lower side, since I recall your car being peppier than mine when they both were NA with slight bolt-ons :/
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07-01-2015, 12:19 AM	#3
seank enthusiast 48 Rep 1,695 Posts Drives: e30 m3,e90 wagon,sprinter,z4m Join Date: Dec 2011 Location: sacramento, ca iTrader: (4)	Do you usually go to the dyno when it is 107 degrees? Most likely a weak fuel pump, assuming his foot was in it to redline.
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07-01-2015, 08:02 AM	#4
pokeybritches Colonel 479 Rep 2,782 Posts Drives: ESS/G-Power Z4M, VF Z4, 996tt Join Date: Sep 2009 Location: Los Angeles iTrader: (12) Garage List 2006 BMW Z4M [10.00] 2006 BMW Z4M [8.50] 2003 BMW Z4 3.0i [9.00]	AFR still looks ok though. He should run it up to 8k rpm, unless he noticed a significant power loss or other issue at WOT. __________________ VF Engineering Z4 3.0i, ESS Z4M, G-Power Z4M, 996 Turbo
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07-01-2015, 10:43 AM	#5
mfanatic325 ///M-fanatic 193 Rep 3,885 Posts Drives: '01 911 Turbo Join Date: Oct 2007 Location: Cupertino, CA. iTrader: (23)	BTW Mike, what section1 and mufflers are you currently running? Not that I think they're the issue here, but ughh...your car should be making more power
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07-01-2015, 03:48 PM	#6
Calichase Lieutenant 105 Rep 404 Posts Drives: '07 s/c'd Z4MC '08 e82 '02 m3 Join Date: Feb 2013 Location: Orlando, FL iTrader: (0)	Our stock ecus apparently stop fueling at 6500 according to Frank at ttfs. Edit- seems that was stated above, and you have a tune which would eliminate that
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07-01-2015, 06:13 PM	#7
rjahl Colonel 996 Rep 2,287 Posts Drives: Z4 35is Join Date: Jun 2011 Location: Tampa iTrader: (0) Garage List 2012 Z4 35is [0.00]	You should check out the Dyno thread from the E90 forum, lots of good information from a post started by Axiom. http://www.e90post.com/forums/showthread.php?t=916863 What car is this? I or SI ? Either case the ECU does not cut fuel at 6500 RPM. Soft limiters start to kick in a bit higher.
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