E28 Megasquirt FAQ

alijonny · Post by **alijonny** » Apr 09, 2009 3:26 PM

soooo... I assumed all was good with the 3.57 . Now I have the setup in my possession pre-built. NOW WHAT?

I know it may be no one's fault but my own. I'm kinda bummed today. It really helps that these things come with absolutely no instructions other than what is online.

I can feel some really stupid questions coming up as I get blocked along the way.

I need lunch.

what exactly makes it more tricky? I assume with any electrical parts, the MS is mine now. I took it out of the shipping box, but have not removed it from the plastic container.

Post by **Brad D.** » Apr 09, 2009 3:46 PM

Since most of the electronic components on the 3.57 board are surface mount devices, it makes modding the board harder. I believe though that most of the major jumpers needed though are still in place for the end user to select. You should be fine. Please post your questions and we will help the best we can.

alijonny · Post by **alijonny** » Apr 09, 2009 3:52 PM

what exactly will I need to modify?

Post by **Brad D.** » Apr 09, 2009 4:04 PM

It all depends on how it was setup when it was prebuilt. Is it setup for a VR sensor input? Direct coil control? What idle control components are on the board? I can guide you if you you need help answering these questions

alijonny · Post by **alijonny** » Apr 09, 2009 4:19 PM

here is how it was set up: placed in shopping cart, gone thru check out, paid in full, delivered to my door. lol.

I opened up the package, and took the cover off the top of the box and am in the process of seeing what I got myself into.

megasquirt number on the reciept is MS2357-C Megasquirt-II PCB v3.57 (SMT)

here are the details from diyauto:
# All 'Basic Components'
# PWM Flyback Damping Circuit components
# Hall Sensor/Coil(-) and VR Sensor Ignition Trigger Components (jumpered for Hall sensor, optical sensor, points, or fuel only using negative coil input- you can reconfigure for any input you like)
# Current Limiting Circuit Components
# 5 volt ignition output (JS10 jumpered directly to pin 36) for EDIS, Bosch 124, or GM HEI ignition control
# Slot for installing a BIP373 (not included) for direct coil control
# Also includes solder-cup DB37 and DB15 with clamshells for building your own harness.

I just ordered the idle board from GG and noticed their options like said previously in your posts about what options to have built into the board. DIY doesn;t seem to have that, or is it because the of the versatility of the v3.57?

turbodan · Post by **turbodan** » Apr 09, 2009 5:11 PM

alijonny wrote:here is how it was set up: placed in shopping cart, gone thru check out, paid in full, delivered to my door. lol.

I opened up the package, and took the cover off the top of the box and am in the process of seeing what I got myself into.

megasquirt number on the reciept is MS2357-C Megasquirt-II PCB v3.57 (SMT)

You remember what I said about mentioning the specifics of your application when you order it? You should have told them to add provisions for a VR sensor and direct coil control. Now you have to do that.

alijonny · Post by **alijonny** » Apr 09, 2009 5:25 PM

I ordered it online, no specifics were asked for.

turbodan · Post by **turbodan** » Apr 09, 2009 5:37 PM

You have to tell them. Did you get it from DIY?

alijonny · Post by **alijonny** » Apr 09, 2009 5:40 PM

yes. All I told them was my address and my CC info. There were no options or other info that would help me choose other than what they had. If it had been any more difficult to order I would have stopped and asked questions.

turbodan · Post by **turbodan** » Apr 09, 2009 5:43 PM

They dont prompt you for specifics. Gotta ask. I'm sure they would be willing to add the hardware provisions for your application but you'd have to send it back to them. That or you could DIY.

alijonny · Post by **alijonny** » Apr 09, 2009 5:52 PM

I think I had too much time between when you told me the options to get and the time I ordered. I have had so much crap going thru my mind about this build trying to figure out this and that. I'm gonna need a vacation after I am done with this build. I just sent DIY an email explaining my situation, hopefully they can steer me in the right direction. I do thank you guys, you really don't have to help me at all and I appreciate every bit of info I am getting. I hope to reimburse those who helped me with tasty alcoholic treats at 5erfest. please print and save this coupon for 5erfest use.

e30-m30_kid89 · Post by **e30-m30_kid89** » Apr 10, 2009 12:08 AM

Hey its all good...I told myself once i get my MS somewhat running i'll try to help out as much as i can with anyone else starting out...I'll try to help with questions you have.

alijonny · Post by **alijonny** » Apr 10, 2009 3:24 PM

here's the scoop:
...What this amounts to is that a v3.57 is actually pretty easy to modify for a direct coil control, and super easy to switch to a VR sensor input. All you have to do it run a jumper wire from JS10 to IGBTIN, and install a BIP373 in the q16 spot on the output side. Then on the input side of things, you'll change jumper JP1 shunt over on pins 1-2 and J1 on pins 5-6(if its an inverted input that you need. IE: if all of the guys with v3.0s were jumpering Tsel to VRoutinv you'll use pins 5-6)

Post by **Brad D.** » Apr 10, 2009 5:14 PM

That's good to hear. It sounds basically like what you have to do to a v3.0 board.

alijonny · Post by **alijonny** » Apr 11, 2009 4:02 PM

I'm having problems loading megatune... I go into

http://www.megamanual.com/files/software/ and notice there are about 12 different files to download. which do I download? is this something I need to pay for? I downloaded it on my computer here at the shop to see what I was getting into I don't know what I downloaded, but I was able to get to the tuning portion. I deleted it knowing I wasn't going to tune with this computer. I went home and got on my laptop to download and couldn't get the same download...or couldn't get it to open the program. The laptop is a dell Inspiron 1100 (junk right?). I have a buddy who tunes Hondas who is kindly letting me use his WB and his mini laptop until I get the car tuned, so I am happy about that.

alijonny · Post by **alijonny** » Apr 11, 2009 4:26 PM

ok i'm on my buddy's mini laptop and it downloaded perfectly. stupid dell computers... I guess I can only use the dell for porn only. lol

Shadow · Post by **Shadow** » Apr 12, 2009 2:38 AM

Sorry if this has been covered.
But I seem to have a different version of megatune.

Does this look right to you guys? I also don't see a
box for BTDC?
Thanks.

FirstFives Dictator · Post by **FirstFives Dictator** » Apr 12, 2009 10:09 AM

BTDC is implied

e30-m30_kid89 · Post by **e30-m30_kid89** » Apr 12, 2009 10:36 AM

while we are on the topic of trigger angles and what not, I wanted to check my timing when i swapped out the rad but i read timing moves with temperature so it wouldnt be good to run it with no rad.

Which brings me to the next question...I think i would be able to visually access the hole on the bell housing that i guess was used for timing on the older m30s, would i be able to confirm timing there?

EDIT: quick reading through the megamanual answered this last question..

Shadow · Post by **Shadow** » Apr 12, 2009 2:29 PM

FirstFives Dictator wrote:BTDC is implied

what do you mean? Are my settings fine you mean?

George · Post by **George** » Apr 12, 2009 2:32 PM

Shadow wrote:
FirstFives Dictator wrote:BTDC is implied
what do you mean? Are my settings fine you mean?

You won't know for sure until you check it with a timing light.

I just takes a few minutes to check. Peter wrote up some instructions that clarifies exactly what to do.

FirstFives Dictator · Post by **FirstFives Dictator** » Apr 12, 2009 4:09 PM

Shadow wrote:
FirstFives Dictator wrote:BTDC is implied
what do you mean? Are my settings fine you mean?

No it just means that any positive number you put in the box is that many degrees before top dead center.

So -10 in the box is 10 degree after top dead center.

alijonny · Post by **alijonny** » Apr 13, 2009 2:28 PM

ok, I got the GG idle board, is there a schematic online for building this? I can't seem to find it.

Post by **Brad D.** » Apr 14, 2009 10:48 AM

It's been a while since I assembled mine, but it was pretty easy. I think the components were in labeled bags and they just go where they are silkscreened on the board. As for wiring, you need switched 12V (I used the switched power that turns on the MS controller), ground, connect the Fidle output pin from MS to the Fidle pad on the idle board, and ISV1 out and ISV2 out are connected to the idle control valve open and close pins on the Motronic connector.

alijonny · Post by **alijonny** » Apr 14, 2009 11:21 AM

sweet! I will check it out!

Frederik E32 · Post by **Frederik E32** » Apr 15, 2009 9:03 AM

My M30B30 posts a vacuum of about 60 Kpa at idle, which seems high to me, shouldn't it be around 35-40?

What might contribute to this, I'm not aware of the camshaft being anything else but stock.

Running MS2Extra + wasted spark.

Thanks!

turbodan · Post by **turbodan** » Apr 15, 2009 11:44 AM

I have between 35-40 kpa manifold vacuum at a warm idle. If I give it full ignition advance it'll get into the low 30's.

russc · Post by **russc** » Apr 15, 2009 1:29 PM

Mine runs 43kpa @ warm idle.

Russc

turbodan wrote:I have between 35-40 kpa manifold vacuum at a warm idle. If I give it full ignition advance it'll get into the low 30's.

e30-m30_kid89 · Post by **e30-m30_kid89** » Apr 15, 2009 9:21 PM

I only pull 48 - 50kpa when fully warm. After i get things sorted out id expect it to be lower.

Another Q - I know it depends on the injetor size but i want to know if I'm off or you M30 guys. What are your idle PWs?

mine is 3.3 - 3.2ms when warm, and up to 3.7ms when cold.

too much?

M. Holtmeier · Post by **M. Holtmeier** » Apr 15, 2009 11:01 PM

What size injectors?

There's not really a "too much." It is what it is if your idle is right. With my 60 lb/hr inj.s I'm sitting right at 1.7, which is the recommended threshold of too much injector. I'm getting picky with it though, mine idles better than my stock eta. My 7 is real close, not wine glass close, but bmw inline 6 close. I'm still shooting for absolute perfection, and I feel megasquirt is capable. When I dyno'd, the operator said I had the best running megasquirted car he had ever seen. Not saying much out here in the midwest, but still felt pretty good.

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E28 Megasquirt FAQ