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Old 07-28-2018, 01:05 AM   #1
erebuswarrior
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E85 Overrun Pops & Fire on NA

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Last edited by erebuswarrior; 09-23-2018 at 04:03 PM.
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Old 09-20-2018, 03:34 PM   #2
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You figure it out?
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Old 09-21-2018, 01:40 AM   #3
FRSBRZGT86FAN
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I've been doing a lot of research and testing trying to figure out the best way to get pops+fire out the exhaust on NA FRS/BRZ/86's. I know it's pretty easy to do on FI with overrun but I won't be going FI for awhile. So far I've found I like overrun logic pops way better then editing base timing b. That lurching motion is awful and overrun=downshift rev matching pops is perfect lol. I've noticed that changing pulse width influences how it pops. 0.8ms is the easiest to get to pop and is pretty sharp all the time. Going to 1.8ms, to 2.8ms, it can be harder to do on demand but you can get some nice ones when downshift rev matching. I'll link a photo to what I'm currently running. Just looking to see if anyone has ideas on how to elicit fire and maybe get this to work with LC like a faux antilag? I know again in FI you can get 2 step antilag systems that pop and make good flames, but I want to see how close we can get to that on NA. Hoping this will be purely productive, I get there's the whole "why do that, why do this" side of the fence, and my goal isn't to argue about pops vs no pops. This isn't just for me, it's to help the BRZ/FRS/86 community in general for those who are interested in this kind of tune add on.

UPDATE 1:
So I've been spending time messing around with what works and doesn't work. If anyone checks back on this thread just know I'm still working on figuring it out since I can't find anyone to spill the beans lol. The below values are no longer anywhere near what I'm using now to achieve decent flames, these are the tables I've been messing with however just different values. Next I'll be figuring out what fueling tables to changed that will only hopefully affect fueling during overrun. I'll update this thread once I've figured it out.
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You figure it out?

I'm interested if this ended up working as well. Although I already had my fun with the pops and bangs tune edits on 93 and wouldn't put it on e85, I'm very interested on whether or not it worked. Also e85 is worse mpg as it is, I wonder how much of a hit this added as well.
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Old 09-23-2018, 04:10 PM   #4
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I'm interested if this ended up working as well. Although I already had my fun with the pops and bangs tune edits on 93 and wouldn't put it on e85, I'm very interested on whether or not it worked. Also e85 is worse mpg as it is, I wonder how much of a hit this added as well.
I've actually gotten it figured out and found the sweet spots. MPG isn't that different. maybe 1/4 a gallon of MPG difference at max? It's pretty much indiscernible. Throwing much larger flames on 91/93 then E85 of course. No stupid jerkiness with overrun pops that you would get with just editing B Timing Table. I think on 91/93, catless headers, catless aftermarket, or catted OEM front pipe, getting about 2-4 foot flames or so. E85 is about half that, sometimes 3.
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Old 09-23-2018, 09:00 PM   #5
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I've actually gotten it figured out and found the sweet spots. MPG isn't that different. maybe 1/4 a gallon of MPG difference at max? It's pretty much indiscernible. Throwing much larger flames on 91/93 then E85 of course. No stupid jerkiness with overrun pops that you would get with just editing B Timing Table. I think on 91/93, catless headers, catless aftermarket, or catted OEM front pipe, getting about 2-4 foot flames or so. E85 is about half that, sometimes 3.
Care to update post with maps?
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Old 09-27-2018, 02:56 PM   #6
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Overrun always causes rev hang or sometimes even auto rev matching type effect when I try it..

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Old 09-27-2018, 08:45 PM   #7
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Care to update post with maps?
Currently still working on some refinements after some people having issues with things like easy rev match. I've pretty much figured that out, but now I'm working getting it to play nice with automatic trans twins, since during auto mode aut rev match struggles with the same values that manuals use, however manuals don't have this issue. So once I've got everything copasetic for auto's and manuals I will post my findings.
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