Author Topic: M42 Engine management maps and info (Read 27353 times)

tim_s · « **Reply #45 on:** April 25, 2007, 05:14:00 AM »

how 'nice' did the output look gunni? mine looks fine if you're smooth with the throttle, otherwise it behaves like the above. you any tips/advice? I don't have the WB02 hooked up tio it yet, after I've done a bit more work on getting the voltages matching I'll hook up the WB and try some proper tuning.
I've just enquired to get a price for an MS2, i'm tempted to try the new extra code and forget all about this.

Gunni · « **Reply #46 on:** April 26, 2007, 04:52:29 AM »

It looked very smooth, altough I did notice MAP really is inline with TPS movement, those curves where almost identical,

you must remember that MAP and TPS are quicker to respond then the AFM,
so if the AFM signal looks to be behind that only means that you�ll see better throttle response afterwards when the fuel is squirted sooner.

tim_s · « **Reply #47 on:** April 26, 2007, 02:17:54 PM »

hmm, well the signal from mine is ok, a bit unstable at idle. It's not as smooth or accurate as the AFM though. The output signal from the SMT is even less smooth, as you can see in the log above. The MAP sensor doesn't seem to respond any quicker than the AFM on the logs, if anything its slower, and i may have to add a restrictor and plenum to the vacuum line to smooth off the oscillations in the idle. What MAP sensor did you use? I'm using a standard GM MAP sensor.
Tuning using the wideband is going better than trying to match voltages, although i don't know whether i'll be able to get this setup as good as factory because the output voltage from the SMT is not as smooth as the original AFM output.
Got a quote for MS2 yesterday, am VERY tempted by MS2 with the new extra code. would like to see this through first though.

Gunni · « **Reply #48 on:** April 26, 2007, 06:24:13 PM »

I used a 3.5bar sensor , same sensor as used for some nuclear stuff,
I got if from Zeitronix,

tim_s · « **Reply #49 on:** April 27, 2007, 08:52:58 AM »

I've just begun to understand why I'm seeing problems. I didn't realise that the values of the analog deflection map on the SMT are not interpolated. This is a big problem. I'm going to try to use the 1x16 temp map to help. Any other suggestions gunni?

tim_s · « **Reply #50 on:** April 28, 2007, 12:12:30 PM »

to add to my woes with the SMT6, just removed the MAP sensor and plugged the AFM into the SMT6. Now with a completely blank map and the input and output voltages according to the SMT being the same under all conditions, the car runs lean on WOT and feels a bit crap all round. PP is wired into the ECU power and ground so there should be no problem there, and i didn't appear to have this problem when the MAP sensor was the input to the PP.

Gunni · « **Reply #51 on:** April 30, 2007, 08:47:23 AM »

That is odd,
do you have the correct mode on in the global settings,
the SMT might be thinking your AFM is a Frequency MAF unit

tim_s · « **Reply #52 on:** April 30, 2007, 10:10:10 AM »

nope, afraid not

I've since got it working a lot better - simply increasing the base offset for fuel calculations (forgot what it is called!) up a bit helped. Needed to then do some tweaks to get the AFRs where i wanted them, but its ok now. I really would like to get to the bottom of the problem though, it does seem very odd that a zero'd map wouldn't give factory performance. I'm shortly going to try a MAf, I only have a spare 76mm one atm, not a 67mm so it will have to wait a bit.

Gunni · « **Reply #53 on:** April 30, 2007, 06:07:09 PM »

Well whatever you do you have at least tested and tried more solutions then most ever will and thats some good home schooling

Frankie · « **Reply #54 on:** May 01, 2007, 02:29:17 AM »

Please, do inform from where you have extracted the maps you are showing.

Furthermore, don't explain things to yourself but open up the issue bit more that it actually could be understood by other readers (and amateurs...)

Gunni · « **Reply #55 on:** May 01, 2007, 05:55:35 AM »

Are you reffering to me?
If so I belive I posted everything needed to know in the first page

tim_s · « **Reply #56 on:** May 01, 2007, 06:55:59 AM »

seems to be a pretty open discussion to me, if there is any info required feel free to ask! yeah gunni i agree about the learning, i always wanted to try the SMT as i jumped straight in with the MS. am a bit happier with it now, but I must admit it's really made me appreciate the qualities of the MS. I think I'd like to try MS again, but I did find it hard to get it to start and warmup as well as factory which are the areas I'd need to work on. With the SMT I think I really need rid of the AFM, but I'm a bit concerned that I won't get it to drive properly on MAF - time will tell.

bar73k · « **Reply #57 on:** October 30, 2008, 05:57:13 AM »

Re-opening an old thread,
what ignition maps are people running these days?
the map below is my ignition map im running

its from a wolf3D Ver4 (completly standalone ECU)
running in my e30 318is m42 turbo

the left hand column is load which is 0~107%
this load is calculated using throttle position and a map sensor (manifold pressure)
at 107% load i am at WOT and 22Psi pressure

there is no second multiplyer table, the computer calculates everything
so if i run 10Psi i might only reach 78% load (not sure exactly what i reach just guessing here, but if i run less boost, then the lower part of the map is only used)

all values are Deg before TDC

im wondering if i can push my values a little more

JiXer · « **Reply #58 on:** December 26, 2008, 02:33:16 AM »

Does anyone have MegaSquirt maps for fuel & ignition?
Actually any software will do. I'm just looking for maps that are MAP (KPa) vs. RPM instead of load% or throttle position.

J.

JiXer · « **Reply #59 on:** January 04, 2009, 10:58:56 PM »

anyone?