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BRZ Second-Gen (2022+) -- General Topics General topics for the second-gen BRZ |
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12-21-2022, 02:14 PM | #29 | |
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Quote:
Some other data points from a 15 car dyno day with different levels of modification. These are two OEM preface lift cars. https://www.pointmeby.com/2017/10/18...esults-15-86s/ |
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12-21-2022, 03:53 PM | #30 |
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To be fair (2nd reference), anyone who tunes with AFR's looking like that? I'm not really putting any stock into it.
Just leaning it out on the 91 would have yielded some gains, that thing is running pig rich by 5k and is richer than 12:1 near peak. Don't ever let person touch your car.
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12-21-2022, 03:57 PM | #31 |
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I'd like to see this addressed by a professional tuner. I mean....I doubt it was a mistake. I wonder what their intentions were.
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12-22-2022, 05:43 AM | #32 |
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(in general not for this thread only)
I love how everyone forgets that the variance for a dyno is 3-5ish%. ^ That's back to back the same car the same day the same tune. That's 6-10WHP at 200 WHP Something almost nobody looks at or talks about. |
12-22-2022, 09:24 AM | #33 |
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Something else they don't often think about is variance can be both positive and negative.
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12-22-2022, 10:48 AM | #34 |
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Like I said on the previous page, that amount of variance is basically statistical noise.
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12-22-2022, 11:12 AM | #35 |
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Those afr are probably taken at the exit of axleback so real afr is more than -1 than those
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12-22-2022, 11:39 AM | #36 |
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Both runs on the graph above are on OEM tunes with different fuel.
Variance is possible +/-. The article suggested all cars did multiple runs and best of was used for the graph Last edited by RToyo86; 12-22-2022 at 11:52 AM. |
12-22-2022, 12:46 PM | #37 |
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People do talk about it, but rarely back up the statement. The variance can be less than 3% as well. Plenty of YouTube dyno vids show plots laying on top of each other. I dyno'd my old Celica back in the day on a couple different Dynojets in the city. The back to back pulls were with in 3whp or 1.8-2% with SAE correction factors.
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12-23-2022, 03:36 PM | #38 | |
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Quote:
It's easy for a tuner to cherry pick the best and worst pull *WITH ZERO CHANGES TO THE TUNE* and show a large difference. Even showing cold and hot pulls can show a big difference. It's also a part of why CSG chooses to use a (far more expensive) dynapack, rather than a roller dyno. |
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12-27-2022, 09:52 AM | #39 |
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01-22-2023, 01:44 AM | #40 |
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Didn't see anyone post this:
https://find93.com/ Been fairly handy for me in California. Be sure to call or scout ahead. Not all locations seem to be available or existing. Also has a blend calculator. |
01-23-2023, 10:50 AM | #41 | |
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