Logworks 3.0
 

I have a lm2 and have it all set up. I just need to know the formula for the map sensor. You know 5volts=11psi 0volts=26 inches type thing. I think its an obdo map sensor.

Re: Logworks 3.0
 

0v = 0 psia, 4.74-4.75v = 9.25 psi. It won't go 5v, but if it did it would read Hyundaidata's erroneous claim of 11.3 psi.

Re: Logworks 3.0
 

Joseph, these numbers are not right.

http://wikitest.pgmfi.org/twiki/bin/...rary/MapSensor
http://wikitest.pgmfi.org/twiki/bin/.../OBD1_8bitMBar

Specifically:
mbar=365.9(volts)-29.9

I honestly can't say for certain what your min and max voltage on the sensor is, but you can assume roughly the same as Motorolla sensors which I believe to be .2v and 4.9V. It could be 4.75V as JD has said, but I couldn't say for certain. Honestly, it won't matter. Plug in the equation I gave you and whatever the sensor does, it does.

Re: Logworks 3.0
 

Dunno the minimum voltage, but my max figures are correct.

Re: Logworks 3.0
 

The voltages, maybe, the pressures are not as long as we are going based on the shop manual. Your voltage may be correct. Your pressure may be correct, but if we are following the data sheet, both are not correct. I don't believe the Honda sensor to have THAT loose of tolerances to allow such a significant difference in theoretical value to actual value. I've always said I was going to put a sensor on a pressure vessel and compare the different types. I never did. Add it to the list.

Re: Logworks 3.0
 

are you using an ssi-4 or something similar to get sensor data into logworks? there are plugins you can use for this....especially if obd0...

i will look for the formulas on my pc when i get home...

Re: Logworks 3.0
 

The lm2 has 4, 5 volt analog inputs and rpm input. So it record that an afr on the sd card. I know about plugins, ecu control, freelog and what not. I just wanted some thing to record with out all the lap top ---- hooked up. Logworks was the answer in my situation due to I have a lm2 now.

I found this is the service manual. I also recorded my Iat and tp measurements. I am not good at math but I tried doing a slop calculation I don’t know??
Attachment 11040
Will this help? I will do more math later.

Thanks everyone I will try all the formulas.

Re: Logworks 3.0
 

OK, Motorola sensors are 0-4.9 volt units.

And it looks like the Helms says 0v = 0 psia. As for 9.25 psi at 4.7x peak voltage www.zdyne.com

I think you should stop looking at 8 bit resolution values, that's shoddy and not very accurate. Ask Warner why he was nutshit about 16 bit fuel maps.

Re: Logworks 3.0
 

Ok I am using your equation. The only problem is in logworks I can not brake it into 2 things. For instance I can have inhgvac or psi but not both. The table set up will only read to 0 of each so if I am set on inhgvac I can not see boost if I am set on psi I can not see vac. So I need to know something different like 0v=30inhgvac and 2.9v=0inghvac then something like 3.0v=0psi and 4.7v=9.25psi. I am so confused. I can open the same file and set up both and but them up to each other. Then it starts to look like something usable.

Is logworks just gay?

Re: Logworks 3.0
 

Joseph, stop. Look at a data sheet before telling me I'm wrong. Then you should look at my SIMPLE ACCURATE calculations and verify that I am indeed correct because on this occassion you are wrong, I can prove it, and it's not worth getting in an argument over. Not to mention I only refer to 8bit calcs when refering to the ECU and my raw formula is totally unrelated to bits, bytes, or anything of the sort. Again, I'm about 99.97% sure I'm right on this one. Take it for what it is worth.

PS: Blake never saw the resolution as an issue with map sensor values so there was never a reason to move from 8bit to 16bit map sensor data allocation thus why he never did it. He was the ultimate proponent of interpolation and not giving a ---- whether the map sensor was 100% accurate. Look back on HT on his ramblings about Neptune and how stupid he thought 24 column fuel maps were.


Fuse, pick a unit and stick with it. -29.92inHG=-14.7psi=0mbar. It's just a pressure conversion. The numbers work. I'm not familar with log works, but pick the unit it works with and give it the defining values it needs.

Re: Logworks 3.0
 

sorry...i was tihinking lm1 (instead of llm2)

since you dont like math, i wont bother posting my actual formulas...

to simplify everything... (vacuum is negative, boost is positive)
for a stock obd0/1/2 "honda" map sensor:
inHg ~ (9.96 * volt) - 28.42
or
psig ~ (4.89 * volt) - 13.96

as far as logworks, im not sure that if you can break it into inHg for vacuum and psi for boost or not. with a plugin you can, but a direct voltage input im not sure.

Re: Logworks 3.0
 

Here

Re: Logworks 3.0
 

LOL LOL ---- thanks. That is exactly what I was looking for. I cant just stick with a unit sorry. Logworks is so strange I will not go into -psi or -inhgvac. And you can only pick one unit at a time. So you have to double open the file and run one psi and one inhg.

Re: Logworks 3.0
 

Quit with the logical red herrings. There is no data sheet for the stock sensor, and you have never measured output versus pressure on multiple units. I have.


I use 24 column fuel maps on anything 3 bar or bigger. You see, I tune a lot of cars and Blake hasn't. All that extra resolution paints a very clear picture of engine VE as there are usually pronounced dips and quirks in engine operation that 6-7 psi scalar spacings lose. That extra resolution saves time when tuning, too.

Would you like me to type that up into data sheet format for you? For the record go shove a datasheet up your ass, I've read more datasheets in the last six months than you will in your entire life. Are you going to tell me to brush up on Ohm's and Kirchoff's next? Don't make me fire up mspaint and deface a picture of you.


I don't know why it's so fun to be mean to you, but it is.

Re: Logworks 3.0
 

Blah blah blah. You said that Motorolla sensors read to 0v, they don't. You are an internet loud mouth and are happy to post to the world any accomplishment you've had. If you benched a stock sensor, let alone more than one, you would have posted and bragged about it. Lastly, I never said I agreed with Blake's opinion. I simply corrected your memory of it.

Anything further about the Honda sensor is up to your own discretion. I personally think Joseph's numbers are off. How much? Not enough to matter really, but they are off. I based my information on the Honda Shop Manual and compared it to the other ECU ROM editors. I've had discussions with some of those authors where they came up with their numbers. Answered varied and many of those individuals got mucked up in pressure conversions causing minor errors. The code was solid. The pressure conversions, not so much. Take it for what it's worth.

Joseph, knock yourself out with MS Paint. I don't really care.

Re: Logworks 3.0
 

If you want to plot the slope of their line, they do. Who gives a good goddamn about how the output knees off at 0 volts and 5 volts? The slope of the line of their operating range passes through 0 volts :1


Check my Honda-Tech posts circa 02-03. It was one of my frequent anti-Hondata commentaries.


Continue to think without any accomplishments to back you up - it's fun to laugh at you.

Re: Logworks 3.0
 

Logworks isnt gay, you just cant mix two scales like InHg and PSI and put them on the same access.

For a honda, get used to using MBAR maybe?


You're both laughable...

The EASIEST point to calculate is 0 vacuum (1000 mbar)...ie KOEO. Measure that with an Ohmeter and that is 0 psi (1000 mbar) :)

Second point, I use 10.5 psi (1750 mbar) = 5 volts and thats always been "close nuff" for me :)

Re: Logworks 3.0
 

1000mbar isn't KOEO, 1 atm = 1013.25 millibars.....

Re: Logworks 3.0
 

I am high altitude will this make ---- worse for me?? Usually I have noticed my map reading are a bit low. Most times when I tune n/a I never use the far right coulombs for a wide open pull. Never gets to them. Don’t get me wrong I do tune them (guess).

Re: Logworks 3.0
 

holy christ you are a tool...no one is building nuclear weapons here, we are tuning cars

Re: Logworks 3.0
 

It was a joke.

Re: Logworks 3.0
 

internet sarcasm > xenocron (once again)

Re: Logworks 3.0
 

I'd love bigwig more if he'd chat me up on AIM.

I feel unloved. :'(

Re: Logworks 3.0
 

He lives 45 minutes from me and I've never met him...dont feel bad.

Once I was in his area and he bought a boost controller from me, however I was inside when he showed up...so he just grabbed the MBC from my car and threw the cash in the drivers seat. he might be a ghost.

Re: Logworks 3.0
 

LOL.

I knew he was an antisocial little fucker.

Re: Logworks 3.0
 

Chris, that is not how the story went.

I drove my car to my Dad's shop and was supposed to meet Chris later to buy a MBC. I was testing Gooberdata code earlier in the day and got a bad burn on my ECU. Car rev'd fine but had a CEL. Long story short, something was all fucked up and I fouled my plugs. I never met Chris nor did I get the MBC from him that day. He later shipped me the MBC which I paid him via paypal.

As for Joseph, ---- you. Why would I want to talk to you on AIM? Are you a reasonably attractive female? I think not.

Re: Logworks 3.0
 

Nah nah nah....I was at a wedding or graduation or something near you and you picked it up (from under my car) and put the $20 through my window. That other was a different time...

I member reall good....

Re: Logworks 3.0
 

Lol this got off topic. Any ways I used all the map sensor scales I don’t know thy all seem to work nice compared to freelog. The problem I am having now is my rpm is way off on logworks. Innovate said to use injector #1 for a signal I think this was a bad idea (said my motor hit 10000rpms/ no way it would be in pieces all over the road). So I was thinking I would tap into the ignition control wire (one going to the igniter). Will this work? what is it 2 signals per one revolution? Or what do you all use to get a clear rpm signal the coil or some thing?

Re: Logworks 3.0
 

The IGO wire is going to send one digital pulse per combustion event, so 4 pulses per 720 degrees crankshaft rotation.

Uhm, yeah, what you said. :l