BE CAREFUL WITH TIMING GUYS!!! seriously - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 10-15-2009, 10:25 PM   #21
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Quote:
Originally Posted by webby459 View Post
Guys, don't you lose some (or a lot) of resolution when your maps are scaled out that far? Seems like a waste.
The more resolution generally means more tuning. The only time you need another cell is when two cells have a significant amount of non-linear change. So for instance:

cell A is 1.000
cell B is 2.000

This ECU automatically interpolates (like many) to divide inbetween each cell.
So if you are exactly inbetween A and B then the value is 1.500. If you are 1/4 the way between the two cells its 1.250, and its weighted properly down to .001 on this ecu.

So there are actually a thousand cells between each division.

The only time it would be off is if there was a strong curvature somewhere, but at the spacings on the maps, you would be REALLLY lucky to see more then a 1% from optimum between any two cells. Vehicles generally respond linearly with pressure, and they don't vary too significantly with RPM at all. Having more cells just adds tuning time for what a smaller map would already do.
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Old 10-16-2009, 08:34 AM   #22
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Yes 93 here maybe I'm wrong but I always thought NA's had stronger internals and lower compression then NB's but I'm not possitive, do feel free to tell me otherwise.

Last edited by miataspeed2005; 10-16-2009 at 09:30 AM.
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Old 10-16-2009, 09:12 AM   #23
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18psi

I do not know anything about turbos or timing maps, but one thing stuck out in my mind when I saw pics and read your thread. You said that you were running in a very rich condition.

Running too rich will wash away oil lubricating the piston rings. over time, the cylinder walls will get scratched and heat will begin to attack the pistons. Coupled with other problems, an over rich condition could have contributed to your problem.

Just a thought for you to look into.
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Old 10-16-2009, 09:36 AM   #24
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Fuel vaning doesn't occur until 9:1 or less. I doubt he was down that low. I believe he was more at plug fowling rich, not fuel shower rich.
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Old 10-16-2009, 04:34 PM   #25
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Quote:
Originally Posted by miataspeed2005 View Post
Yes 93 here maybe I'm wrong but I always thought NA's had stronger internals and lower compression then NB's but I'm not possitive, do feel free to tell me otherwise.
Well they do have 9.0:1 vs 9.5:1 and as far as I know much less of them have bent rods/melted pistons so I'd actually agree with you on that one.
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Fuel vaning doesn't occur until 9:1 or less. I doubt he was down that low. I believe he was more at plug fowling rich, not fuel shower rich.
It ran rich but not THAT rich. Like I said, 13's at cruise and low 11's high 10's in boost.
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Old 10-17-2009, 12:59 PM   #26
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Here is what I am running right now... I feel it to be fairly mild with EGTs in the 1100 range mostly... But what is too hot, anyhow?

Cheers,
Matt
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Old 10-17-2009, 01:03 PM   #27
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Originally Posted by prospero View Post
here is what i am running right now... I feel it to be fairly mild with egts in the 1100 range mostly... But what is too hot, anyhow?

Cheers,
matt
BE CAREFUL WITH TIMING GUYS!!! seriously-timing-map-102009.jpg
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Old 10-17-2009, 04:23 PM   #28
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Quote:
Originally Posted by Prospero View Post
Here is what I am running right now... I feel it to be fairly mild with EGTs in the 1100 range mostly... But what is too hot, anyhow?

Cheers,
Matt
900 Kelvin?
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Old 10-17-2009, 04:25 PM   #29
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Yep, pretty damn close to that number...

I've peaked at 1400 at times while tuning...
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Old 10-22-2009, 03:55 AM   #30
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900 Kelvin, eh.
1400 is not a problem. I tuned my 1.6 FM2 to 1550 fahrenheit, 10 years and many trackdays ago. Haven't touched the settings for 6 years or so. It still runs as well as it did then. I wouldn't go over 1600 though.
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Old 10-22-2009, 04:07 AM   #31
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Ummmm, Ive never tuned a miata before, but the timing map in the OP looks very conservative to me, like more conservative than a typical base map (which are designed to be extremely safe.
But like I said, Ive never tuned a miata, just lots and lots of boosted hondas
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Old 10-22-2009, 09:13 AM   #32
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It really depends on valve material, which I don't know what valve they used so no-one could really say. Sodium filled valves probably do 1850. On the other hand, mild steel crap valves probably shouldn't be taken over 1200. I seen a graph a couple days ago with recommendations, but couldn't find it.
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Old 11-25-2009, 02:30 AM   #33
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wow i should point this out.

Travis in the download i got for adaptronic, 18psi's ignition map is the default one for the 460cc injectors
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Old 11-25-2009, 04:11 AM   #34
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Yes it is. There is nothing wrong with the map aside from the ignition table though. And at low boost it should be decent enough to START OFF WITH. All these maps he provides are just to START OFF WITH.
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Old 11-25-2009, 12:07 PM   #35
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i donno i was just pointing it out since from your thread its an unsafe map to run.. perhaps scale it down a notch so its at least safe to tune off of.
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