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Brain MS3X Idle 'Issues' (Idles at 3k)

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Old 05-01-2017, 03:46 AM
  #201  
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Post your updated tune.
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Old 05-01-2017, 06:47 AM
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with FF injectors you have to significantly raise your VE cells at idle, like double.
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Old 05-01-2017, 08:08 AM
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Info here
https://www.miataturbo.net/diy-turbo...5/#post1314428
only the last page in this thread. some of the info in the beginning was not accurate.
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Old 05-01-2017, 09:30 AM
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Zomg! Thank you!

I was looking for that and I guess I wasn't using the right search terms. Sweeetttt!

Edit: I put in the values and I'll see how it works in the evening.
Car really didn't want to start this morning. Almost sounded like a misfire, but it was totally fine when it got going. That was weird... Sadly no log, but maybe this is a good reason to leave an SD card in there forever.

Last edited by ridethecliche; 05-01-2017 at 09:58 AM.
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Old 05-01-2017, 10:32 AM
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its also on their website, and iirc, it's already in your tune if you use curve #2.
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Old 05-01-2017, 11:02 AM
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Brain,

On your map, curve 2 3 4 are all the same. The numbers also don't match the 4 bar settings here: https://www.miataturbo.net/diy-turbo...5/#post1314428

I believe the NB1 is returnless and the pressure is 4 Bar, is that correct? Dr. Boone and sonofthehill had posts discussing that on the thread linked above.

Last edited by ridethecliche; 05-01-2017 at 11:22 AM.
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Old 05-01-2017, 11:05 AM
  #207  
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correct: 2 3 4 are all the same, and 1 isnt...

just use column E in your link to populate one.

they also have the samll pulse widths table here:: Injector Data ? Flow Force Injectors


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Old 05-01-2017, 11:23 AM
  #208  
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Cool! I used column E.

I also edited curve 2 and left curve 1 alone and made a note on TS regarding the injectors it was for. Figured it wouldn't hurt to have banked the values for the stock injectors.
I went in and edited curve 2 in the small pulsewidth curve to both rows of the numbers on the chart you linked and enabled non-linear values. I'm not sure where the 'original' values there came from since that's not what I had, but now my chart/graph looks like the one linked as well.

As an aside, should the mainboard injector dead time setting match the dead time @ 100% value? The TS dialog box says 0.7-0.9 are the expected values but nigel gives a 1.261 value.
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Old 05-01-2017, 12:36 PM
  #209  
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most people aren't running injectors sized for tanks...
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Old 05-01-2017, 12:47 PM
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I was just looking a few things up since 4 bar fuel pressure would make these injectors 740cc afaik.

Is the NB 3 bar or 4 bar? Moss Miata's pages list the fuel pressure at 38-46, which is 3 bar if my math is correct.

I iz confuzzled :(

http://www.mossmiata.com/sitegraphic...r_specs00.html
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Old 05-01-2017, 12:48 PM
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Its 4bar. 60psi non vacuum referenced.
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Old 05-01-2017, 12:48 PM
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the NB is 60psi always.
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Old 05-01-2017, 12:49 PM
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Thanks guys!

So then I should be using 740CC for injector size, not 630CC, no?
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Old 05-01-2017, 12:52 PM
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Sure if you want. ReqFuel is just a multiplier. You can type pretty much whatever you want in there and just tune the VE table to match.
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Old 05-01-2017, 12:52 PM
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no.

your injectors are 630cc, which happen to have 60psi of pressure behind them.
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Old 05-01-2017, 04:05 PM
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640cc @ 3bar 43.5psi
740 @ 4bar 60psi

Usually injectors are rated at "default" pressure of 3bars - it is stated on the injectors datasheet.

Last edited by elior77; 05-01-2017 at 04:30 PM.
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Old 05-02-2017, 01:41 AM
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Is there any reason why a car would idle perfectly and start to go nuts and try to stall when put in reverse even at idle? I'll have to take a log of this tomorrow, but I parked on a slight uphill for the second night in a row and the car died in reverse even if i had the clutch in and wasn't moving. Totally fine for the rest of the time today.

Also, I really need to track mileage because I feel like the car is definitely chugging away at gas. Am I nuts to expect ~30mpg from an NA miata running MS and EV14 injectors?
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Old 05-04-2017, 04:28 PM
  #218  
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So, I was just poking around TS and MLV and found the fuel economy stuff.

Is there any reason my VSS would be inaccurate? It's reading in the single digits for some reason. I also think the current gear doesn't work.

I did go back and change TS to read speed from VSS since it was using GPS. Maybe it'll be fine in the next log?
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Old 05-04-2017, 04:37 PM
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Gear is not actually detected, but calculated based on vehicle speed, tire size and gear/diff ratios. So if your measured speed is wrong, your gear will also be wrong.
I'm running VSS sensor into tableswitch input and 4000 pulses/mile. Seems to be pretty much dead-on- verified with GPS.
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Old 05-04-2017, 04:55 PM
  #220  
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I might have to redo my table. I can't figure out how to edit it now. I'll find it eventually...
It was a table that popped up for either VSS or mpg that had needed values for spark every 720 degree rotations etc. I believe this was on MLV for the calculated field. I'm sure that what I'm saying is difficult to understand because I'm using all sorts of incorrect terminology here...

As a side note, is the VSS input 4k pulses/mile or 40k pulses/mile. Mine is currently set to the latter. I've never messed with it so that may be the reason it's off?
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