dyno, 1st run 155hp, remaining 4 runs 172hp. wtf? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Jasonb · 05-27-2018, 02:28 PM

Quote:

Originally Posted by NoHaveMSG

Does the stock tune reset to .7 on each startup? I haven't been on one for a while and never checked.

Yes, .7 on each startup

Lantanafrs2 · 05-27-2018, 03:39 PM

172 sounds like you got a good one.

steve99 · 05-27-2018, 08:39 PM

Quote:

Originally Posted by Jasonb

Yes, .7 on each startup

unless it was already lower than 0.7 :-)

ecu uses iam initial value at startup, unless the iam value after last drive was less than iam initial.

Lantanafrs2 · 05-28-2018, 08:35 PM

Some days I wish this thing had a softly tuned bigger motor in it so I wouldnt have to brake drag it to get the iam back. Knock sensor shit . I guess it would make me less of an "enthusiast" though.

wparsons · 05-28-2018, 08:46 PM

Quote:

Originally Posted by NoHaveMSG

Does the stock tune reset to .7 on each startup? I haven't been on one for a while and never checked.

Yep. It might not revert on a hot restart, but definitely if parked for a while.

ermax · 05-29-2018, 10:03 AM

Quote:

Originally Posted by wparsons

Yep. It might not revert on a hot restart, but definitely if parked for a while.

It will reset even on a key flick while rolling. As steve99 pointed out, it will only reset if the IAM climbed above the initial. If it was below the initial then it will restart at the lower value.

nico_rsx · 06-03-2018, 12:53 PM

I just learn reading this about the 0.7 IAM. Is it only on the 2017?
I do autocross a lot with my 2017, and often stop the car between runs. This would mean i lose a lot a HP in the following run!!

How much time does it take to go back from 0.7 to 1? Does it come back after the first pull in first gear? Does that pull need to be to redline? From the start line I usually shift to second at 6500rpm, since I reach the first slalom before redline. Is that enough to go back to 1.0 IAM?

And is there a way I can monitor the IAM without an Ecutek or OFT? I have a OBD2 reader. Maybe I can check the timing advance and deduce the IAM?

Thanks

Irace86.2.0 · 06-05-2018, 11:25 PM

Was the negative battery terminal pulled; ie was the ECU reset, and it needed to learn?

06-03-2018, 12:53 PM	#21
nico_rsx Senior Member Join Date: May 2016 Drives: BRZ 2017 Pure Red, MT Location: Quebec, Canada Posts: 309 Thanks: 122 Thanked 121 Times in 83 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I just learn reading this about the 0.7 IAM. Is it only on the 2017? I do autocross a lot with my 2017, and often stop the car between runs. This would mean i lose a lot a HP in the following run!! How much time does it take to go back from 0.7 to 1? Does it come back after the first pull in first gear? Does that pull need to be to redline? From the start line I usually shift to second at 6500rpm, since I reach the first slalom before redline. Is that enough to go back to 1.0 IAM? And is there a way I can monitor the IAM without an Ecutek or OFT? I have a OBD2 reader. Maybe I can check the timing advance and deduce the IAM? Thanks Last edited by nico_rsx; 06-03-2018 at 02:15 PM.

06-05-2018, 11:25 PM	#22
Irace86.2.0 Senior Member Join Date: Mar 2017 Drives: Q5 + BRZ + M796 Location: Santa Rosa, CA Posts: 7,884 Thanks: 5,668 Thanked 5,805 Times in 3,299 Posts Mentioned: 70 Post(s) Tagged: 0 Thread(s)	Was the negative battery terminal pulled; ie was the ECU reset, and it needed to learn? __________________ My Build \| K24 Turbo Swap \| K24T BRZ SOLD

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05-27-2018, 03:39 PM	#16
Lantanafrs2 Senior Member Join Date: Jan 2018 Drives: 2013 frs red Location: South Florida Posts: 3,517 Thanks: 2,520 Thanked 3,089 Times in 1,654 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	172 sounds like you got a good one.

05-28-2018, 08:35 PM	#18
Lantanafrs2 Senior Member Join Date: Jan 2018 Drives: 2013 frs red Location: South Florida Posts: 3,517 Thanks: 2,520 Thanked 3,089 Times in 1,654 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	Some days I wish this thing had a softly tuned bigger motor in it so I wouldnt have to brake drag it to get the iam back. Knock sensor shit . I guess it would make me less of an "enthusiast" though.

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