Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Knock fix with Australian Fuel 98/100 RON

Fizz · 06-19-2014, 12:46 AM

I did a power run on a dynapack yesterday, as I've never dyno'ed this car before. Here are the results:
http://s9.postimg.org/kevmjohnz/2014...527_Page_1.jpg

This chart overlays a run taken from stock BRZ which was done on the same dyno:
http://s9.postimg.org/g70uaxg8f/2014...527_Page_2.jpg

My tune was done by @jamesm from HRI Tuning. Only other mod is a Motiv catted front pipe. I felt that I really needed a custom tune instead of a canned tune because the of the crappy fuel here...even on 98RON...and the ECU's hyper-sensitivity to fuel quality.

Anyways, what I noticed was that the AFR readings from the dyno run doesn't quite match the readings taken from my OFT logs. Can someone chime as to why? Here's my most recent data log taken couple of days ago: http://datazap.me/u/fizz/hrilog11?lo...1&zoom=33-2077

The AFR's from the dyno appears to be quite lean at WOT...?

06-19-2014, 12:46 AM	#132
Fizz Senior Addict Join Date: Jan 2013 Drives: 86 GT Location: Perth, Australia Posts: 1,217 Thanks: 249 Thanked 336 Times in 215 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	I did a power run on a dynapack yesterday, as I've never dyno'ed this car before. Here are the results: http://s9.postimg.org/kevmjohnz/2014...527_Page_1.jpg This chart overlays a run taken from stock BRZ which was done on the same dyno: http://s9.postimg.org/g70uaxg8f/2014...527_Page_2.jpg My tune was done by @jamesm from HRI Tuning. Only other mod is a Motiv catted front pipe. I felt that I really needed a custom tune instead of a canned tune because the of the crappy fuel here...even on 98RON...and the ECU's hyper-sensitivity to fuel quality. Anyways, what I noticed was that the AFR readings from the dyno run doesn't quite match the readings taken from my OFT logs. Can someone chime as to why? Here's my most recent data log taken couple of days ago: http://datazap.me/u/fizz/hrilog11?lo...1&zoom=33-2077 The AFR's from the dyno appears to be quite lean at WOT...?