megasquirt users timing maps

[progman]

If you don't mind can you please post a screen shot of your timing table? I would like to look at them to get the general flow of what it should look like. I'm sure you have but please make sure the timing is in sync with the real timing (trigger offset).

[progman]

really no one?

Can someone tell me if this map looks close to stock. It is is the would explain why my light load low rpm is so rough. I don't have nearly enough timing... unless i'm reading it wrong.

[progman]

Some unknown ca18det timing map. no idea if its tuned or not



my current timing map. and yes i know the pressure is way too long. I'll fix it.

[r34 gtr]

I'll holler at this in the morning. One thing though, 100 kpa is atmospheric pressure, so you need to increase the scale of that map to: 150kPa for 7psi, 200kPa for 14psi, etc.

I'll try and send you one tomorrow. The stock CA timing map has super high values at the bottom BTW, like 60.

[progman]

Oh Tim, I would very much so enjoy that.

[vlad_rally]

could someone please show or send me the fuel and spark tables for the ca18det... i will recive a MS for my s13 and it would be way more easy for me to have some tables to try, and if required modify...thank you

[dash]

progman
just saw your dyno result...... looks like a solid runner
You seemed to megasquirt your CA18 'reasonably quick. A few questions

did you do a write up ?
curious about which route you took ?
EDIS/trigger wheel ?
start from scratch - build the MS ecu & loom yourself, or preassembled..... ?
loaded it up yourself ?
tuned it yourself ?

thanks

[r34 gtr]

Yeah, if you don't mind I would like to ask a few questions. One MegaSquirt user to another. PM me if you get a chance?

[progman]

progman
just saw your dyno result...... looks like a solid runner
You seemed to megasquirt your CA18 'reasonably quick. A few questions

did you do a write up ?
curious about which route you took ?
EDIS/trigger wheel ?
start from scratch - build the MS ecu & loom yourself, or preassembled..... ?
loaded it up yourself ?
tuned it yourself ?

thanks

It is a solid runner. I'm pretty happy with it now. there is still one last major issue I'm working out (something odd with my setup). But to answer your questions:

I did not do a write up.

I took the Ford EDIS4 with the trigger wheel. Looking back on it I still would have gone with the trigger wheel but I would not have used EDIS. I would have installed another coil driver and did native coil control. There are only two benefits really to this. The big one is that I could then run spark cut for rev limiting the second is just less hardware to be in my engine bay. The downside to the direct coil drive is that it takes more research and I *think* you have to have high impedance injectors or the dropping resistors wired in.

I bought the MSII (v3) from a nico member who was going to use it. He assembled the MSII himself so I got it built (he built the same exact way I was going to build it anyways). It came with the 12' megasquirt harness that I cut soldered and wrapped. I had to buy the IAT sensor and get the EDIS 4 parts from the junkyard.

I configured everything myself by following the mega manual

It was actually cheaper to have my dyno shop tune it for me since they gave me a flat rate. I was going to try to tune it myself but the cost was going to be about the same IF everything went good

I'm actually still wrapping up a few things and I'm going back to the dyno. I would be willing to do a right up once it's completely done. Also one thing to note about my tune is that the timing map was just "guessed" by the tuner based on experience. I took it to him because he has a steady state dyno so I was a little disappointed that he didn't steady state tune the timing map for me. But overall the results were great so I'm happy with the tune. After looking at all the other dyno runs listed here I made a good amount of power for the turbo I have. Without a steady state dyno tune you will never get that last 5-10% plus a steady state will smooth the entire map and have much better partial throttle responce etc.

If I do do a write up it will be complete with MSQ files and maps. The MSQ file would save everyone tones of time. All you have to do is build everything the same as me then load my MSQ file and it will run.. Just need to tune.

[ragenasian]

I am also going to be going megasquirt here soon. I got it all wired up but currently a stock setup. Anybody have a good base to start from? No Dynos anywhere near where I am or anybody here that can tune megasquirt that I know of. Germans just seem to chip tune.

[dash]

progman
thanks for the detailed reply
didn't mean to sweat u for a writeup.... only wondering if u did
there was a good MS thread about here somewhere but I don't recall a result followed thru to a dyno etc.

I'd think any EDIS 4cyl setup was be basicly similar

Not trying to be lazy, but I've seen many "shortcut" MSqt - like those of us who don't have the time for extensive reading or confidence in our skills to build a reliable ecu. Of course we don't mind paying more for these sorta "plug n play" setups..... like DIYauto offers for the toyota 4AGE for example

Also had a plug n play MSqt "spinoff" offered to our starion club for very reasonale price. Tell 'em your setup: shipped loaded & base map included. Most ran great & made excellent power straight out the box. So I know it's possible

Tuning is enough of a learning curve all in itself, but it's great to have tried and proven base maps to tweak, as you pursued starting this thread.

If I do do a write up it will be complete with MSQ files and maps. The MSQ file would save everyone tones of time. All you have to do is build everything the same as me then load my MSQ file and it will run.. Just need to tune.

Would be extremely helpful indeed.
Your Msqt CA18 approach has proven a well executed plan that paid off great obviously. Well done!

Does EDIS 4 or native coil have 2 step (for launching) ?


vlad_rally
if no luck yet, try asking Jerry at diyautotune.com, for some of his turbo 4AGE maps. I don't see why they wouldn't get you up and running.
They also offer plug n play MS for the miatas. Their 1.8L maps should suit a ca18 fine
http://www.miataturbo.net/forumdisplay. ... ne=-1&f=18
http://forum.miata.net/vb/forumdisplay. ... ne=30&f=74

[r34 gtr]

Hey progman, you need to enable PMs on your account control deal so I can reply.

I was just curious what you thought of the whole system now that you had it tuned and driving around. I already have MSII, so you don't need to try and sell me on it, just some thoughts.

[progman]

r34 gtr/all,

I took a lot of time to get everything to this point. If I were driving the car at the time this would not have been completed. Read this and let me know how much you agree with. It took me while to understand how to software worked and how the save and restore data like maps and getting all the right ini files and getting megatune setup (updating the MS2 firmware gave me a few headaches). I wish I had someone local to show me how everything worked because that would have complimented my reading so much. Many times I planned on doing something and later found out that I can't. For example I bought a boost control kit without researching it enough. It turns out that the boost control kit conflicts with using PWM to run low impedance injectors without dropping resistors like I am doing. I also thought I could do spark cut but you can't with the EDIS4 module. I did a lot of research but should have done a lot more. I can still change my setup to allow me to do those things I mentioned but it's more work. It's fun to do and figure out but if you just want plug and play then your going to be disappointed.

If we had a better write up I'm sure the mega squirt process would be much more simple.

I just remembered:

I also had a lot of trouble getting the idle to work. On the ca18 we have a fiddle valve which is either on of off for fast idle. I never figured out how to get that to work so my car does not fast idle. A couple of people were adjusting the throttle plate so that it is cracked a little with the fuel petal at rest to allow the car to idle.. I think that is a poor solution. I ran a line from my cold pipe to the stock manual idle value and manually adjusted the idle there. I don't have fast idle but I have not had any problems without it. You could install the GM idle stepper motor and have the mega squirt control it to get a very clean idle but that would cost about another 100 dollars..

I forgot to add! With the trigger wheel setup that I have I need to machine my power steering bracket to make power steering work again. originally I didn't think I wanted it. We are going to have to figure out a better way to mount the trigger wheel. I forget who it was that mounted the trigger wheel in between the P/S and A/C but I think that is the best way to go. I had a machine shop mount my wheel and the labor was 75$.

I had to make the VR sensor bracket my self. The first one I made sucked and when I hit a bump it would mis fire. I made a new one and It's much more rigid. I think I'll machine one out of aluminum but I want to hold off on that until I figure out what I'm going to do with the power steering first.

Also one more thing that I tired but had problems with is at first to only run the fuel injectors from the MS and leave the stock computer doing timing. Once you get the fuel roughed in with a wide band then take the factory computer out entirely. I did this setup for like 1 hour until I decided the hell with it and ripped out the factory computer

Now that I'm in the last phrase of the mega squirt I'm starting to machine some block off plates and such to make my engine look better and get rid of some unused parts on my intake.

I think standalone will only get more popular for this engine. How many people are running this engine with stock power? How long until the electronics get scarce? I think the more power you make and the older the electronics get the more people will want stand alone. Judging from the discussions and people in here over the years I feel that most people who own the ca18det are cheap DIY type of people so I only see the mega squirt getting more popular.

Tim, I'm going to take existing megasquirt write up and re write it a bit and add some stuff to it and clean it up a bit. I would like to then send it to you for editing and maybe pass it on to anyone else who was interested. Then ask Float or Dee to replace the existing one with it. I would like to get a real good guide setup. It should be easy since we have a good start with the existing one and we went though the whole ordeal already.

[r34 gtr]

I do have a degree in English (useless I know) so if you want me to make that writeup read smoothly, send it my way. I can also add pictures of my VR sensor bracket, etc. etc.

I am also wishing I had gone with something other than EDIS, as I really want spark cut rev limiting too. The GM system looks alright, as does simply running a MSD system, but that gets me further into this thing monetarily. We shall see. I have to get a paying job first ans foremost!

Thanks for the info! You pretty much answered all my questions. If I come up with anything else I will be sure to ask.

P.s. have you seen that MS3?! Its nucking futs!

[dash]

It's fun to do and figure out but if you just want plug and play then your going to be disappointed

hmmmmm..... if plug n play works well for other motors, why wouldn't it on a ca18 ?