Getting 800cc injectors to idle - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 09-03-2010, 02:11 AM   #21
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Thank you again sir
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Old 09-10-2010, 01:52 PM   #22
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Hey triple,

How was the weekend? Get to spend any time on it?

I got the chance to ride in ILoveOffRamps MSM at Hallett last weekend, it felt good and he was having a good time with it. Mostly. lol
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Old 09-10-2010, 05:21 PM   #23
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The injectors are supporting 14.7 at idle just fine, its the damn ecu leaning as soon as voltage drops. Here is an example, i lower my windows, a/fs go up to 17 parts for few seconds. i turn on the lights, same thing, i rise/lower both windows at the same time, engine dies because its leaning out +19a/fs...

I keep picking at it little by little but that voltage drop a/fs increase i cannot figure out yet.
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Old 09-10-2010, 05:27 PM   #24
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I'm not too familiar with the tuning software you have - I've messed with ILOR's a couple of times - but you might look to see if there is a voltage adjustment or compensation for when the injectors will see a lower output.
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Old 11-19-2010, 05:10 PM   #25
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Honestly i'm hoping to replace them the next emissions testings if not sooner, i've just about had it with those big injectors. .001ms makes enough difference to go lean and the car to die at idle...either that or they are opening different amounts whenever they want to as adaptronic isnt showing any changes in ms nor the air sensor.

I wish i had stuck with my plans and gotten smaller but Travis said he had those idling...

Last edited by triple88a; 11-19-2010 at 05:24 PM.
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Old 11-30-2010, 11:54 PM   #26
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The big deal with the injectors is that you have to be gentle with the fuel maps. Lots of massaging. Additionally fuel isn't the only setting you need to be concerned with. The idle side is definitely involved as well. Those 800s run great on my Miata, but it did take some tinkering.
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Old 12-01-2010, 12:40 AM   #27
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Well the issue is that they are doing whatever they want. Now they would be extra rich, a sec later same setting they will go to lean then back to rich. I cannot get a solid a/f unless i'm pushing them at +3ms. Not only at idle, any setting that is at low ms goes crazy.
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Old 12-14-2010, 01:41 PM   #28
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Hrrrm, upgrade to the newest firmware and see if PD ignition helps solve the problem. Like I said man. I didn't get that idle completely finished when you were down, (we were having problems with the labtop connecting). Meet me somewhere, and I'll get it tuned the rest of the way in or we'll get a new set of injectors in it.

If you do your turbo upgrades first, I've been planning to goto Chicago anyways. Find a place with a set of rollers rent some time and I'll tune in your new setup for free, and then finish your idle out.
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Old 12-20-2010, 08:00 AM   #29
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Hi,
Can someone please post their DW 800cc ecu maps here? or send it to me [email protected] thank you
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Old 12-25-2010, 11:41 PM   #30
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Getting them injectors to start in sub 0 temps seems to be even bigger issue. Currently I have them set for cranking between 4-5ms which is obviously rich however if i lower them down to 2-3 ms where they should be, the car keeps cranking like there is no fuel.
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Old 01-10-2011, 03:40 PM   #31
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triple88a: can you please send/post your DW 800cc maps so I can get my car running
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Old 01-10-2011, 04:48 PM   #32
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My fuel map is the only thing that is alright, i got it to start at 36 at -10c and slowly reducing fuel as temp goes up to 29 at like 60C and then 29 from there down.

I'll get the map tomorrow.
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Old 01-11-2011, 05:18 PM   #33
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As promissed this is what i'm running right now. Please understand this map is not perfect. I'm running at 6 psi so it is tuned up to only 140. Dont forget the baseline of your sensors will change the tunes little bit.
Attached Files
File Type: ecu trip0111.ecu (8.0 KB, 115 views)
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Old 01-13-2011, 05:38 AM   #34
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I got my car running with original 240cc map when reduce idle values from 2.4ms to 0.8ms. AFR was 14.7 straight up as seen here: http://www.youtube.com/watch?v=lHKfuVQCJDw

Do I have to change “dead time values” with these DW injectors? My stock injectors seems to have 1,1ms but triple88a has 0,14ms in his ECU file. What is correct value with these Deatschwerks?
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Old 01-13-2011, 04:43 PM   #35
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Check your paperwork from Deatschwerks. Its in there. I ended up changing mine a bit to get it running. Let me know what you get.
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Old 01-13-2011, 04:49 PM   #36
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If the actual deadtime is longer than what you put in the software, when running closed loop O2 in idle, the injectors can abruptly lean and the engine will die.
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Old 01-14-2011, 11:37 AM   #37
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The latency (dead time) values we provide are collected in a laboratory environment. They should be used as a guideline and tweaked until you get it to your liking.

Also, settings are going to be a little different from car to car.
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Old 01-14-2011, 04:37 PM   #38
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Can you tell us what the "clamp voltage" is on the drivers you used?
A different clamp voltage gives a different effective dead time.
Higher clamp voltage = larger dead time.
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Old 04-05-2011, 10:58 PM   #39
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Quote:
Originally Posted by muoto View Post
I got my car running with original 240cc map when reduce idle values from 2.4ms to 0.8ms. AFR was 14.7 straight up as seen here: http://www.youtube.com/watch?v=lHKfuVQCJDw
Sorry i must have missed this post. Why you were running only .8ms i dont know, maybe my injectors are not fully opening so they need longer time? Anyhow see your afrs are all over from the upper 13s...over the 15s not steady 14.7 Maybe i'm just ---- about it but when i was running stock ecu, that gauge almost never changed. I've yet to get a good steady afr with the adaptronic. Once i hit operating temp my motor starts looping around and revving slowly withing a 200 rpm band around my 850 rpm target... my afrs end up swinging between low to mid 13s up to mid 15s.

I changed my dead times to the values provided with the injectors as they seem a little less laggy although the motor seems to die easier when the fans turn on.

Last edited by triple88a; 04-05-2011 at 11:25 PM.
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Old 04-06-2011, 02:46 AM   #40
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I ended up to ditch my old map and start new VE map with correct dead time values from Deatschwerks. My idle shows steady 14.7 now after cold start enrichments.

Car runs happy now. At 160kPa I see inj.duty cycles around 50% Only problem is that my Water injection seems to destroy my MAP sensors pretty quick. Have to use longer boost hose for sure…
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