Q's about the EMU, data to follow in another post. - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 04-16-2008, 11:34 AM   #21
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Quote:
Originally Posted by MX5-4me View Post
One day it will be E85 right now Iím trying to get warm idle\start with 93 Octane Dead Dinosaur, not working.. We have fudged with the Lag time with no noticeable improvement.

Iím also getting a knock sensor CEL P0325
Are you messing with both lag times? Not meaning to be redundant or that I know all. I started with .54 for the stock units, but found they idle best around .68, which I think the EMU it drops to .67 automatically.

I haven't gotten any CEL's at all, but I dont have a knock sensor either.
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Old 04-16-2008, 11:46 AM   #22
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Quote:
Originally Posted by 96rdstr View Post
Are you messing with both lag times? Not meaning to be redundant or that I know all. I started with .54 for the stock units, but found they idle best around .68, which I think the EMU it drops to .67 automatically.

I haven't gotten any CEL's at all, but I dont have a knock sensor either.
Right now i'm running the Lag times 0.64 (before) and 0.74 (after).

I haven't played with it for a while i'm hoping to have some time tonight.

The Stock injectors are very different in the 99 compared to the 96.. I wondering if the lag time is much lower sense it's a new design.
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Old 04-16-2008, 12:33 PM   #23
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As fate would have it I just scored a set of RX7 injectors 460cc-19550-20010, high Z.

From hell's heart I stab at thee, damn low Z injectors.
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Old 04-16-2008, 12:39 PM   #24
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doesn't the EMU have preset injector settings for the RX7 engine?

Maybe you can get the settings for the RX7 injectors from that?

Damn work .. I wanna play with my car NOW!!
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Old 04-16-2008, 02:39 PM   #25
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for the before lag time i have 0 after lag time i am using .90on 460's that should at least get it idling nicely.
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Old 04-16-2008, 02:43 PM   #26
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what some experienced here, the Inj correction factor
is not working well with "big" injectors like 460s/550s.
Simply typing the sizes in before/after is not functional.
You need to reduce the "after" for min. 10%.

The problem is, for example 230/550 corection factor the EMU
reduces inj duty cycle to much, the inj adj. map would need
more then 100% to get desired AFRs.

If you try a 500 or 480 with real 550s, things get better in boost area,
AFRs are reached. One here is still playing with this,
I am sure he will post his results over the weekend.

In nonboost area, AFRs will be wrong with this smaler
correction factor. You need to map the inj adj map
in the nonboost area to get correct results.
Furthermore, the water temp and probably idle adj
map should be used with these "big" injectors to
allow cold/warm start and idle.

regarding the "lag time", its the time the injectors
need to open/close. It is on top of the duty cycle.
No fuel is passing during that.
Bigger injectors have mostly bigger lag times,
This bigger lag time without changing
gets part of the duty cycle, reducing real open time.

On idle, using the big correction factor, the inj. duty cycle
is very small, but there is a minimum opening time needed.

Adding bigger lag time, the duty cycle will stay same,
but total opening time rises. If I am correct with this,
you can add fuel aka inj duty cycle in the maps and the
result will be the same as rising lag time.
Sure, changing lag time to fit injectors is the best way.
But I dont think it has to be 0.01 adjustments.

and, in real english this might be understandable :-)


Falk

Last edited by Falk; 04-16-2008 at 03:26 PM.
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Old 04-16-2008, 02:47 PM   #27
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Thanks for the information..

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Old 04-21-2008, 12:24 AM   #28
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Quote:
Originally Posted by musanovic View Post
for the before lag time i have 0 after lag time i am using .90on 460's that should at least get it idling nicely.

My car won't stay running at .90, I have to keep the lags at 1.2 to start and have a rough idle. It idles really good at 1.6 or so, but it isnt driveable at that. I have to set the lags at 1.92 to drive the car then adjust the IJ duty cycle.
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Old 04-21-2008, 12:32 AM   #29
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damn way different than mine but whatever works
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Old 04-21-2008, 12:39 AM   #30
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Ok- so here is the current update. I removed the low Z injectors and the resistors. Put in the RX7 high Z PNP 460cc injectors, 19550-2020. The lag can be set as low as 1.2, but idles great at 1.60. Not driveable though. I have to set it at 1.92 in order to drive the car, then I fiddle with the lag times from there otherwise it runs pig rich at idle, like 10.9 AFR. Stinky...It is currently idling around 13.4 or so. One question I have. When you set the engine type, in my case BP-ZE(NA) it sets the injectors at 220cc, not 254cc which is what I had, stock. Sounds stupid, but...Which injector size do I actually go with? I just want to make for double sure.

I changed the O2 clamp from .32v to .38v, and the pressure switch is still at the .5 setting.

I cannot build boost beyond 2.9-4psi. I checked all the vacuum lines, the HKS SSQV, the couplers, and I removed the MBC. I hooked up the WG directly to the compressor housing. I have the 9psi spring in the wastegate. I am assuming the lack of boost is due to the tune, too rich or too lean. Please let me know if there is something else I need to check.

Please take a look and tell me what you think. As always I appreciate the help guys.

Here are the current maps and the Log from this evening.

Map-http://www.mediafire.com/?j0ftd9w2blj

Log-http://www.mediafire.com/?ro2id3t4ecz

Last edited by 96rdstr; 04-21-2008 at 01:30 AM.
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Old 04-21-2008, 12:51 AM   #31
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That Map Link is the same as the log file..
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Old 04-21-2008, 01:24 AM   #32
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you must have the 550's with that part number you provided. 460cc have different part numbers.
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Old 04-21-2008, 01:29 AM   #33
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stop trying to build boost !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
you are lean as **** according to your log
u'll blow **** up
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Old 04-21-2008, 01:31 AM   #34
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Quote:
Originally Posted by musanovic View Post
you must have the 550's with that part number you provided. 460cc have different part numbers.
2010's-sorry its late.
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Old 04-21-2008, 01:36 AM   #35
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Originally Posted by musanovic View Post
stop trying to build boost !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
you are lean as **** according to your log
u'll blow **** up
Well, I know that. I am not a total idiot. The question was two fold. Why do you think that the logs only go to 5400 rpms or so. That is when I am seeing the boost vs the AFR's, then I am off the gas.

Suggestions?
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Old 04-21-2008, 08:47 AM   #36
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Originally Posted by 96rdstr View Post
Well, I know that. I am not a total idiot. The question was two fold. Why do you think that the logs only go to 5400 rpms or so. That is when I am seeing the boost vs the AFR's, then I am off the gas.

Suggestions?
bc you lean out so much i would guess.
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Old 04-21-2008, 02:23 PM   #37
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Originally Posted by musanovic View Post
bc you lean out so much i would guess.
Would you mind sharing your maps? I found a thread from 2007 where you posted a couple of links, but they are dead links.

Any ideas on how to get the emu pointed in the right direction? If not, I might start over from scratch. Which at this point doesnt seem it would hurt anything.
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Old 04-21-2008, 05:07 PM   #38
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post your file and ill look at it for you. i will edit and tell you what you may want to change.
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Old 04-21-2008, 06:05 PM   #39
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Quote:
Originally Posted by musanovic View Post
post your file and ill look at it for you. i will edit and tell you what you may want to change.
Awesome. I appreciate it.

I/J Scale


Ignition Map


AF Target Map
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Old 04-21-2008, 09:32 PM   #40
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first off are you ever going to be running 28psi or 18psi?
You need to make maps that are more realistic for your car and setup.my fuel maps are empty above 0psi. i let the stock ecu handle the mixture if not in boost.

http://www.mediafire.com/?jyyj1lwyd9i
my file is here

i don't recommend you just uploading the maps to your car since i am tuning it a bit differently. use at your own risk. also i am running bit rich right now. also am using water methanol.
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