New MegaSquirt Developments

[Edub1]

Started messing with my car again - replaced the stock coil with a blaster SS coil. Now the car fires but I'm still not up and running. Turns out the stock coil doesn't work with MS.

I'm reading on the success stories board that the CAS in the distributor should be swapped with another Mitsubishi CAS that has all 4 slits the same as ours has one big one.

Anyway, is anyone having luck with this? I'm running the MSII Extra code on my SOHC.

[neverlift]

man stop pissing in the wind call emance

[Edub1]

man stop pissing in the wind call emance

OK, I have no idea what this means. Is emance a person who can help me?

[480sx]

The stock coil works with MS, you just have to set the dwell correctly. Any coil will work with ms, as long as the coils good...

The CAS also CAN work with MS however, you will have to talk to KrazyDriver about how he got it to work. I still dont think its flawless, and i would say just to get the DSM dizzy and be done with it. When i had my car runnin on ms, it would give a miss timed fire and the crank would actually stop moving. The single slat in the dizzy could not handle the varying RPMs of start up.

There are some guys on Ka-T that run MS with the DSM dizzy and its fine.

Emance is a guy who tunes stock ECU's. Same as enthaply, JWT.

[WDRacing]

Emance sells rom tunes for $150...so far they have a good track record on cars that don't have other issues.

I don't know to many guys successfully using MS on a 240 and having it run WELL. That includes starting, off boost driving as well as WOT. Yes some work...but at what cost?

Rom tune FTW.

[480sx]

I don't know to many guys successfully using MS on a 240 and having it run WELL.

Thats because there arnt many guys who get MS running at all. Your still kinda out on a limb there, even though a few people have done it. I know of less than 3 people who run MS right now on a Ka with any success, and one of those runs ms1 which is a lot easier to work with.

Rom tunes are great, but a full stand alone with a good tune will always beat them out IMO. The thing is, is it worth the hassle(or the cash, think AEM EMS..) to go stand alone? This souly depends on your goals, and for most people, the stand alone is not worth it.

Back to MS... I really just dont think its a viable solution for a daily driver. I know it can be done, i just dont see the cost(time, aggravation included)/benefit being reasonable.

[krazydriver]

edub, shoot me an email later and i'll send you my msq which should show you what you need for the ignition parameters.

I've been running well with the ms2 extra 2.01 firmware @ 6psi for over 600 miles now on my DOHC, CAS wheels are the same though. I just need to dial in the fueling a little better, other then that everything has been great.

[Edub1]

Done and much appreciated. My DD is a 2008 Ridgeline - this car is just for fun so I don't need it to be dependible. Smooth running would be nice though.

Does this new guy tune E-motors? If my next attempt fails I will contact him.

[neverlift]

you can do that, I have a sohc ecu running my dohc right now, should be good for 11psi(old setup was 11 strong) z32 maf insano fuel pressure ftmfw

what is the setup? I might try to help ya out

[Edub1]

Getting ready to get into this thing again. It's an SOHC with a T3/T04 50 trim planning on 12-15lbs.

Strange thing. For a while my motor wouldn't crank. Then I tried it months later and it cranked. Soon I'm going to see if it starts.

This thing is so frustrating I'm getting ready to give up and get a JWT.

[480sx]

Sounds like MS heh. GL dude.

If your having problems with it just turning over then it has nothing to do with MS.

[Edub1]

Well, she fired up for about 15 seconds and then it died. Seems I fried the ignition driver circuit - don't know why.

Does anyone know if I still need the 12V pullup resistor if I've switched to a Blaster SS coil? I'm wondering if that didn't do it.

[480sx]

What is your dwell set at? Do you still have the VB9 whatever its called chip as your ignition driver?

Yes, you still need the pullup resistor. Thats got everything to do with your CAS/RPM signal that you need with the Optical drive. Man this is why when i go MS again im not fvking around with the CAS. Ford EDIS or bust with MS imo. Or MAYBE a CAS with a 32-1 wheel..

[Edub1]

Dwell is set at 3.3 with a cranking dwell of 4.

I'm wondering if I didn't use the wrong version of Megatune with the msq. It's been a long time since I last messed with it and MS is horrible when it comes to dealing with files.

[480sx]

Hmm your dwell isnt that high, but using their calc and the specs for the blaster i came up with a dwell setting of 2.0. I cant see 3.5 burning out your ignition driver though, but i dont know for sure. When i told Matt from DIY what my dwell was he said it was a little low and that i could turn it up but i never got the chance.

I would double check your MSQ first, dude if you want i have 2-3 of those VB9 chips that you burned out i could sell you. 12 bucks shipped and they are yours. I wont be using MS for a while.

[Edub1]

I'm sending it in for them to fix and test. I fried a transistor Q16 IIRC - upper right hand corner on the board.

I noticed there is a setting for "max dwell" that I don't think has anything in it. I wonder if that could have caused it. Anyway, it seems like this thing ought to have some thermal overload protection.

[krazydriver]

edub, the new BIP373 ignition transistor does have a thermal overload. for that... it was really needed.if your still using my MSQ as reference i'm using the blaster SS coil, and those settings have been working fine for me for 2k+ miles.

Man this is why when i go MS again im not fvking around with the CAS. Ford EDIS or bust with MS imo. Or MAYBE a CAS with a 32-1 wheel..

idk why you had such a problem with that.. i agree MS can be a little weird but i might play around with different CAS wheels next spring, see if i can find something better then the 240's stock wheel.

[480sx]

Was it one that looked like that, in the top right hand corner on the heat sink plate?

If so its the VB9 as its known as.

[Edub1]

Yep, that's the one. But now it's split in half, has blck stuff all over it and smells real bad. They looked at my tune which is one I got from John. They said the tune looks fine and they would let me know.

I wonder if there could be a short.

[480sx]

Might have fried your blaster coil and it internally shorted, its possible. Your dwell was slightly high, start with a dwell of two next time and see where you go from there. Honestly the blaster coils suck. When i used it with MS it had really weak spark. Put a stock s13 coil on it and the spark was at least 2-3 times stronger.

If you want those chips they are yours for 12 shipped. I wont be messing with MS for a while heh.

[Edub1]

I sent it back to DIY for repair. Can the coil be tested? I'm sure am ohm meter would tell me if I knew the proper resistance.

Should I be using a ballast resistor?
Modified by Edub1 at 7:40 PM 12/2/2008

[480sx]

For what? The pullup? If thats your Q then no.. Or what?

[Edub1]

Some applications call for a .8 ohm ballast resistor with the MSD Blaster SS. I guess when it's used with out the MSD6 box and with a non-current limiting ECU. I think I was told by someone that it wasn't necessary but now I wonder.

[krazydriver]

Nah, you don't need the ballast resistor. It's used for older points style ignition systems.

I never used it on my car.

[Edub1]

Well the guys at DIY Autotune are replacing the transistor with a new better one. I guess my dwell was too high 3.3ms and 4ms cranking.

This article says I should start no higher than 1.5ms

http://www.diyautotune.com/tec...t.htm

Odd that the code allows you to set it beyond what the hardware will handle.

[evildky]

for the record I have MS running great on my L28ET and an my VG30ET, both of which run fantastic, and I recently helpd a bud tune his MS miata, it now runs great, it's all about the tuning, and with megasquirt it's limitless