nuggie

Alright so I wanna switch over to magasquirt 2.0 set up my car is already fuel injected and I was looking for the easiest way to mount up the new unit. I had two questions for all you pros out there who have done this is there anywhere out there a direct adapter or connector to go from the late model F wiring harness to the magasquirt ecu? and also what all is needed to do this conversion? I plan to get it all from diyautotune.com. I am kinda confused about the HEI dizzy will I have to add another board for that? would it be a better idea (assuming I can't find a direct adapter) to purchase the wiring harness offered on DIYautotune and mount them directly to the sensors or to cut and splice. For cutting and splicing or an all out wiring harness swap does anyone have pics? I also noticed something about a map daddy upgrade what is this?
So far I have ordered:

http://www.diyautotune.com/catalog/m...ase-p-119.html

http://www.diyautotune.com/catalog/m...thru-p-35.html

skirkland1980

iTrader: (2)

Are you building the board yourself or getting a pre-assembled unit? I had problems setting up my 3.57 unit over my 3.0 board. Get the harness if no adapter is available. The relay board my be useful unless you build your own as I did.

nuggie

yeah the unit I ma purchasing is going to be built by myself. I was told that a relay board was unnecessary for the vehicles that came with (and were currently running F.I.). I believe the kit I am getting is the 3.57 so it'll be built under those guide lines not and upgrade, unless I am mistaken

skirkland1980

iTrader: (2)

Oh, I see you're building it yourself. Plan on spending a few hours a day for a week to assemble. You can trigger off the coil directly or run your vr sensor through MS to get more tuning options. Also the DB9 cable is nearly obsolete. I went to radio shack and got a usb/ serial cable for about $50.

nuggie

I was kinda hoping it was lol I would much rather use usb. Is it possible to hook the usb up too the megasquirt board directly(usb to usb)?Okay what is the purpose of having manual control over the coil (if I am understanding you correctly)? and what is the VR sensor

skirkland1980

iTrader: (2)

The 3.57 is always a preassembled unit. The 3.0 comes either way. When I build a MS system I don't use any of the oem wiring or relays. It takes out the guess work when there's a problem.

skirkland1980

iTrader: (2)

The vr sensor is your pickup coil. The advantage is you can control your ignition curve through MS. Now that I think about it, your dizzy doesn't have springs and weights does it? If not you can trigger off coil neg.

nuggie

okay that sounds like the best plan for me as well I have a helluva time finding wiring problems, not that this car has presented many so far. ooh indeed i do see that it is the 3.0 would I need to convert it to3.57? If so how difficult and what parts would I need and would I have to do it at time or assembly or could it be done later on

nuggie

I don't believe so I'll take a pick and post here in abit but in the tech article on DIYautotune it say that I didn't need to trigger of the neg of the coil, but I am open to ideas and that is a route more familiar to me

skirkland1980

iTrader: (2)

The 3.57 has surface mount components and is built by a machine. Oh, don't forget to buy the stim. If you are not familiar with soldering the stim will be good practice. You will also need it to perform tests as you build the board. Also need a decent DVOM.

skirkland1980

iTrader: (2)

On the three units I've built I've never triggered off coil neg so I'm not much help there. I don't know if Matt Cramer is a member here but if you run into problems you can email him at websales@diyautotune.com .....I think that's the email address....

nuggie

I have a DVOM do you have a link to the 'stim' so I can throw that in my cart and get it ordered lol

nuggie

this is my dizzy (conveniently I haven't installed it yet)

skirkland1980

iTrader: (2)

http://www.diyautotune.com/catalog/j...mbl-p-174.html

Will this car need to be emissions compliant?

nuggie

lol I hope not I ripped all that off lol that reminds me I also need to get an EGR block off plate.

nuggie

so how do you do your set up with out triggering the coil?

nuggie

would it be necessary to get the 12' or would the 8' be suffice

LilSki

iTrader: (1)

If you have a electronic advance distributor your best bet would be to hook it up like the page below and used the HEI mod found on diy autotune. That is how I run mine and thus far have had over 10k trouble free miles.

http://www.megamanual.com/ms2/GM_7pinHEI.htm

http://www.diyautotune.com/catalog/p...kit-p-325.html

project89

iTrader: (1)

be aware that there has been a correction to the megamanual and u need to run dwell control , the 7/8 pin moudle only controls dwell when the bypass pin does not have voltage on it

nuggie

okay so I talked to my brother and he talked me into using the relay board, because the wiring harness doesn't include the connectors

http://www.diyautotune.com/catalog/m...-kit-p-31.html
which mean I need a cable to connect the relay board and ecu

http://www.diyautotune.com/catalog/m...able-p-47.html

and the part for the HEI

http://www.diyautotune.com/catalog/p...kit-p-325.html

so in order for the ecm to control the timing I would have to disconnect the wire that goes to the dizzy (the one I'd use to time the car right) and leave that one off. Does this look correct?

skirkland1980

iTrader: (2)

That kit is for 3.57 boards. For 3.0 you just solder in jumper wires. The 8ft cable is plenty. Assemble the stim, then the main board. The instructions will give you options to follow so you will have leftover parts. It's tedious but straightforward. The hardest part is getting the car to run right once the assembly is done.

skirkland1980

iTrader: (2)

Also if you are NOT triggering off coil neg you will not be using the hei module. The smaller dizzy from a tbi engine will give more room in the engine bay.

nuggie

I read somewhere it comes programmed for an L98 corvette engine?

skirkland1980

iTrader: (2)

Yes, I've heard that also.

project89

iTrader: (1)

when i got my first megasquirt the tune on it was for a tpi 350 , i just ordered a new one for a project ill have to power it up and see what kind of tune is loaded into it for u guys

nuggie

Also I just bought that dizzy and would rather not switch it out is it neccesary to do so? Also I got an idea from another fourm would a earlier style pre 89 engine wiring harness hook directly up to the sensors that are already on the engine? And than the adpater to mount directly to the ecu? If that method would work it would bbe the cheapest and easiest. If that would work would a wireing harness outt of an 86 V-6 unsure on what type of F.I. it runs I know its not TPI though camero work?

skirkland1980

iTrader: (2)

To get the best answers to your questions you should contact Matt Cramer at websales@diyautotune.com. He knows MS better than anyone I know. He usually responds the same day. The holidays may be different though but give him a try.

project89

iTrader: (1)

if the v6 harness has the sme pinout it should i know diyautotune lists them for the v6 engines too u would have to add a set of injector connectors and if u have a knock sensor and want to use the knock input of the megasquirt u may have to add a wire


honestly it would prolly be easier to repin the harness u have


my first ever megasquirt install was on my 89 v6 camaro rs that i have turbocharged , i just bought the bare 8 ft harness and wired it myself


its very simple if the car was previously fuel injected since all the relays and sensors are already there i prefer the new harness over the adapter because u get a brand new harness , so no worry about shorts or anything in the harness

the diyautotune harness is very well layed out and very simple to hook up , basically u pull ur old harness cut the conectors off , run the diy harnes sinto the engine back , cut the wires to length and solder on the conectors and ur done



i can wire a whole car in 2-4 hours

nuggie

I also heard some where else about this re-pinning and they said it was as easy as sticking a paper clip in and popping out the connectors. the idea of the new haress intreages me and scares me at the same time I have always had issues with elec. but if I map it out that I might understand it more at the same time however I could easily screw it up and be out another $90

nuggie

alright so for everything shipped it came to 522. and change that is without the harness I can get it later if I need it. well let the fun begin. my brother was also talking about a broadband O2 sensor anyone got more info on that?

Anti-Venom

Re-pinning really is't that bad of a project. It's time consuming, but if you have a pinout, and take it one wire at a time, it's not nearly as bad as it at first seems. Either way, your going to have to take all the wires apart from one end or the other, regardless of if you buy the harness, or re-pin your stock harness. IMO I would much rather re-pin, they're all in one spot, and you don't have to route or wrap anything!

First read this front to back, and then re-read read it again front to back www.megamanual.com

The direct link for wiring an HEI is here www.megamanual.com/ms2/GM_7pinHEI.htm. Tells you everything you need to know.

A direct link for MS'ing a TPI...http://www.diyautotune.com/tech_arti...lock_v8_v6.htm

You don't need the relay board at all if your already injected. You can use your stock relays. The relay board is offered for those that are changing over and building their own FI system from scratch.

As for the USB, there's a USB mod kit you can buy and add a connector to the 3.0 board. It's only $31. Not sure how well it works but it would seem to be much cheaper, and more convenient than buying a DB9 and a DB9-USB adapter cable. http://www.diyautotune.com/catalogue...ter-p-141.html You can't use a DB9-DB15 adapter to your video out, it won't work...(don't ask).

The Map Daddy kit isn't necessary unless your running high boost or climbing mountains. It's just a 4 bar map sensor with BARO correction.

Another link I found to a page that Anesthes made in regards to solding in a delphi 56pin connector. http://members.cisdi.com/~anesthes/p...rom/megasquirt There really isn't a prefabbed connector to plug into our stock harness that I've found.

nuggie

sounds simple so is it literal just cutting the wires in front of the ecu I am kinda confused anyone got pics? or a video

skirkland1980

iTrader: (2)

All I can say about a wideband is avoid the innovate products. I had 2 bad units. One lasted a few months, I returned it for another, it was bad out of the box. Then returned it for a autometer and it's been working great for 2 years now. The default tune should get you going. If you want to fine tune for optimum performance and fuel economy, or your engine is modified, then get the wideband.

Anti-Venom

There's many ways to do it. There's really not a wrong or right way. You can buy the DB37 pigtail for $50 from DIYautotune and solder your existing wires to the pigtail. Just remember the PCM is going to be measuring in millivolt signals so make sure your checking resistance across your connections as you go along to avoid having to chase down problems later.

Look on YouTube and you should also find some video's on building DB cable ends.

LilSki

iTrader: (1)

I built my own harness and soldered everything to the DB37 myself. It really isn't all that hard but what is nice about the pre made one is all the wires are color coded and labeled as to what they are.

nuggie

okay well I decided to go with the stock harness but do the relay becasue thats how my brother hooked all his up

TTOP350

iTrader: (8)

I have to ask, Y are you doing this? If you have a TPI harness, Y not just burn a few chips after a on the fly tune?
I'm just wondering...

nuggie

from the research I did the chips seemed to be more of a pain in the ***, I also like the at the track tuning capability with out having to have the whole car full of computer equipment. with the megasquirt I can just hook it up to my tablet (that fits nicly in the center counsel) and tune it right there. The biggest reason to be honest with you is my brother went this route and could help me.

TTOP350

iTrader: (8)

Sooooo if your brother jumped off a building....
Just bustn chops
I just think it'd be easier to keep the factory stuff..

nuggie

okay how about this one I already order it (just gatta swing by the post office on Saturday and pick it up

nuggie

alright so far this weekend I have invested about 12 hours into putting together my megasuirt this weekend. I found the best instructions at MS3efi.com. apparently you have to build the jim stim first (which I didn't do 0.0) make sure you do what it says and read through it first before you start working on it (once agian something I didn't do and it bit me in the butt) alla in all it's been pretty stright forward

skirkland1980

iTrader: (2)

Sounds like what I said in post #21.

phoenixxx602

Hey sorry to highjack this thread but a quick question because there is a few megasquirters in the fresh thread.. im using the v3.57 with the dyiautotune harness.. im getting no rpm reading in tunerstudio.. iv seen to diffrent ways to wire up the hei8. Wondering if sombody with a running megasquirt car could tell me how they wired it up or mayb why im not getting an rpm signal

skirkland1980

iTrader: (2)

You have to connect the correct jumpers to send tach signal to the ecu. See the megamanual for instructions.

phoenixxx602

Yes i bought the jumper kit from diyautotune also

phoenixxx602

Re flashed the firmware that didn't help. The only settings i have set are the engine constants and the spark set up (falling edge) & (going high).. what should the spark/ing settings be?