Any opinions on this dyno chart?

Silly Rabbit · 10-07-2015, 07:59 PM

Graph looks smooth, but the A/F ratio goes rich after 5k.

With my mods and tune, I was expecting to see 310-320, but didn't break 300. Maybe it has to do with the dyno set up. Shop says it's dialed in to simulate actual driving. Not sure what STD Smoothing is??? At least I now have a number to go by for future changes.

SouthArk370Z · 10-07-2015, 08:31 PM

Smoothing, in this context, usually refers to throwing out spikes so the graph looks smoother. Used to get rid of noise or if the signal naturally jumps around a lot. Ask the chart maker to explain exactly what it means. STD (standard) probably refers to the default setting (5 out of 10 ie 50%, maybe). https://en.wikipedia.org/wiki/Smoothing

ANMVQ · 10-08-2015, 12:21 PM

AF doesn't look that bad, mine is 11.9 or so up top.

Awgd8 · 10-08-2015, 09:49 PM

From what I read from JohnV, is that there is not much hp gain difference if you setup the AF ratio at low 12 vs 12.9 up top of the REV range. Why go lean and wear out the engine if only gaining 1-2 HP?

Dbeckwith · 10-08-2015, 09:50 PM

We both ran in 4th gear. Would that possibly cause a lower than expected output on a DynoJet dyno?

Silly Rabbit · 10-10-2015, 08:25 AM

Here's a re scaled chart.

10-07-2015, 07:59 PM	#1 (permalink)
Silly Rabbit Track Member Join Date: Sep 2013 Location: Brookston, IN Age: 54 Posts: 683 Drives: '12 PW Touring Sport Rep Power: 618	Any opinions on this dyno chart? Graph looks smooth, but the A/F ratio goes rich after 5k. With my mods and tune, I was expecting to see 310-320, but didn't break 300. Maybe it has to do with the dyno set up. Shop says it's dialed in to simulate actual driving. Not sure what STD Smoothing is??? At least I now have a number to go by for future changes. __________________ NISMO R Tune Intakes \ Fast Intentions RHFC \ Borla CBE \ EcuTek Tuned\ SPL Camber Arms \ Powertrix Coilovers \ Swift Springs \ Avant Garde \ Wicked CAS \ Morimoto XB Halos \ Custom Fenders \ Hotchkis Sways \ NLP Splitter

10-07-2015, 08:31 PM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	Smoothing, in this context, usually refers to throwing out spikes so the graph looks smoother. Used to get rid of noise or if the signal naturally jumps around a lot. Ask the chart maker to explain exactly what it means. STD (standard) probably refers to the default setting (5 out of 10 ie 50%, maybe). https://en.wikipedia.org/wiki/Smoothing Dbeckwith likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

10-08-2015, 12:21 PM	#3 (permalink)
ANMVQ A True Z Fanatic Join Date: Mar 2011 Location: Framingham MA Posts: 2,732 Drives: 2014 Q50 AWD Rep Power: 19	AF doesn't look that bad, mine is 11.9 or so up top. __________________ 14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

10-08-2015, 09:50 PM	#5 (permalink)
Dbeckwith Base Member Join Date: Jul 2015 Location: West Lafayette, IN Posts: 107 Drives: 2010 370z Roadster Rep Power: 9	We both ran in 4th gear. Would that possibly cause a lower than expected output on a DynoJet dyno? Last edited by Dbeckwith; 10-08-2015 at 11:12 PM.

10-10-2015, 08:25 AM	#6 (permalink)
Silly Rabbit Track Member Join Date: Sep 2013 Location: Brookston, IN Age: 54 Posts: 683 Drives: '12 PW Touring Sport Rep Power: 618	Here's a re scaled chart. __________________ NISMO R Tune Intakes \ Fast Intentions RHFC \ Borla CBE \ EcuTek Tuned\ SPL Camber Arms \ Powertrix Coilovers \ Swift Springs \ Avant Garde \ Wicked CAS \ Morimoto XB Halos \ Custom Fenders \ Hotchkis Sways \ NLP Splitter

10-08-2015, 09:49 PM	#4 (permalink)
Awgd8 Base Member Join Date: Sep 2013 Location: WI Posts: 165 Drives: 2015 Q40 / 2008 EX35 Rep Power: 11	From what I read from JohnV, is that there is not much hp gain difference if you setup the AF ratio at low 12 vs 12.9 up top of the REV range. Why go lean and wear out the engine if only gaining 1-2 HP?

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