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| Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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#15 | |
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The Dictater
Join Date: Apr 2017
Drives: '13 Red Scion FRS
Location: MD, USA
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| The Following User Says Thank You to Spuds For This Useful Post: | texastwurkt3am (01-09-2018) |
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#16 |
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Member
Join Date: Sep 2017
Drives: '17 PP BRZ
Location: DFW, TX
Posts: 65
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#17 | |
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Senior Member
Join Date: Oct 2016
Drives: Boosted 2017 BRZ PP. GT2860RS, JDL.
Location: Dallas
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Stoich AFR is 14.7, you generally want it around there while idling and cruising. At WOT you’ll usually see around 11-12.5.
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| The Following 2 Users Say Thank You to mjanmohammad For This Useful Post: | Spuds (01-09-2018), texastwurkt3am (01-09-2018) |
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#18 | |
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The Dictater
Join Date: Apr 2017
Drives: '13 Red Scion FRS
Location: MD, USA
Posts: 9,683
Thanks: 26,748
Thanked 12,739 Times in 6,313 Posts
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In closed loop, all cars run at 14.7 as that's the stoichiometric point where all the fuel is burnt using all the air. However you make the most power at lower afrs due to a number of factors. Also, running richer (lower afrs) reduces knock. Knock is bad, so when it happens, the engine reduces timing, which reduces power. So if you run lean (higher afr) you risk damaging the engine AND will have less power. Edit:. See bold. Was originally "open" which was incorrect. Last edited by Spuds; 01-09-2018 at 02:32 PM. |
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| The Following 2 Users Say Thank You to Spuds For This Useful Post: | texastwurkt3am (01-09-2018), TorontoNat (01-09-2018) |
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#19 | |
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Rice King
Join Date: Jul 2017
Drives: '19 FWD master race CTR
Location: The land of the North
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__________________
Glorious Honda.
Know my 5x120 GREATNESS PEASANTS. |
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#20 |
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Not a troll
Join Date: Apr 2015
Drives: FR-S
Location: Canada
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Service department at the dealership I bought the car from basically told me to go fuck myself (obviously more politely) when I was having a transmission issue.
They asked me to return the car to 100% stock form (I had full exhaust, coilovers, wheels, drop in filter, etc). And yes, that included stock wheels with OEM tires when I asked them to clarify that. So, I mean, my warranty isn't void, they just made it clear that they had zero interest in performing the warranty work. Which of course, turned out to be 20 minutes of work via a TCU reflash. Eventually they did the work when I went to the Scion side of things, and asked to take one of their bone stock cars out for a test drive, and replicated the issue in less than 5 minutes, and proved to the service manager that it had absolutely nothing to do with my mods. |
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#21 |
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Ohne Titel
Join Date: May 2015
Drives: 2017 BRZ PP ISM
Location: SF Bay Area
Posts: 684
Thanks: 1,141
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Don't believe the catted header marketing hype.
Catted header + no tune = waste of money. I speak from personal experience. I had a JDL catted header with no tune, OFT stage 1, and EcuTek tune. |
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| The Following User Says Thank You to TofuJoe For This Useful Post: | texastwurkt3am (01-10-2018) |
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#22 | |
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Rice King
Join Date: Jul 2017
Drives: '19 FWD master race CTR
Location: The land of the North
Posts: 2,891
Thanks: 1,079
Thanked 2,002 Times in 1,204 Posts
Mentioned: 25 Post(s)
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Quote:
__________________
Glorious Honda.
Know my 5x120 GREATNESS PEASANTS. |
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#23 |
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The Dictater
Join Date: Apr 2017
Drives: '13 Red Scion FRS
Location: MD, USA
Posts: 9,683
Thanks: 26,748
Thanked 12,739 Times in 6,313 Posts
Mentioned: 88 Post(s)
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#25 |
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Senior Member
Join Date: Oct 2016
Drives: Boosted 2017 BRZ PP. GT2860RS, JDL.
Location: Dallas
Posts: 567
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Thanked 446 Times in 262 Posts
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ECUtek tunes are more dependent on the tuner too, a dyno tune from one tuner will be different from another tuner.
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| The Following User Says Thank You to mjanmohammad For This Useful Post: | strat61caster (01-10-2018) |
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#26 | |
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The Dictater
Join Date: Apr 2017
Drives: '13 Red Scion FRS
Location: MD, USA
Posts: 9,683
Thanks: 26,748
Thanked 12,739 Times in 6,313 Posts
Mentioned: 88 Post(s)
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Quote:
Unless you were saying just that and I misinterpreted, in which case .
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#27 | |
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Senior Member
Join Date: Oct 2016
Drives: Boosted 2017 BRZ PP. GT2860RS, JDL.
Location: Dallas
Posts: 567
Thanks: 97
Thanked 446 Times in 262 Posts
Mentioned: 6 Post(s)
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Quote:
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| The Following 2 Users Say Thank You to mjanmohammad For This Useful Post: | Spuds (01-09-2018), texastwurkt3am (01-10-2018) |
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