Starting my M54B30 swap...

[nando]

Finally found the harness for my coils. I'm reading that someone doing an M50 swap ran 330ohm resistors on the signal wires for the stock COP, does anyone know if it's the same deal for the M54?

sorry I haven't been able to pay attention and help you out - but you need 6x BIP373s, and 6x 330ohm resistors. you run the resistors between the MS3x spark outputs and the BIPs, not between the coils. They need a heatsink; you can probably attach them to the back of the board, or build a seperate module (not a bad idea, keeps noise out of the MS box).

Be careful with that dude's MSQ. use it for info, don't copy it verbatim. I've looked through it, it's not really tuned well for an N/A build (he's turbo if I'm not mistaken, or at least that's how it's set up). You might want to get with steve (hoveringuy) who's doing something similar to you.

[hoveringuy]

We're already discussing it..

I did get mine started yesterday but more on that later.

Anyway, I thought the 330Ohm resistor wasn't necessary on the M3X board?

[nando]

ah, yes. That part was confusing. I think you might be right, the board probably has them already. matt at diy would be a good person to confirm that with.

[hoveringuy]

I started a blog. Look at me, I'm blogging!

Follow my M54 Megasquirt conversion.

http://m54megasquirt3.blogspot.com/

[Elysian]

So gurov is using a Toyota igniter box to run the coils, as seen here:

http://www.msextra.com/forums/viewtopic.php?f=71&t=38902

Can get them for around $20 on ebay but they don't have the harness... I'm thinking perhaps I hit the local junkyards and find one with harness, I'm sure the junkyards will have that year Camry.

Alternatively, this was mentioned in your blog:



What's the best way to get these? Are they just pulled from parts ECU's?

And am I right that, to run sequential injection, you'd need 6 of these, 1 per coil, mounted on some kind of metal material for heat transfer?

[nando]

you need drivers for sequential spark.. you don't need to do anything extra to do sequential fuel. just hook the injector wires to the MS3x injector outputs.

[Elysian]

you need drivers for sequential spark.. you don't need to do anything extra to do sequential fuel. just hook the injector wires to the MS3x injector outputs.

Sorry I got my terms wrong, I was only thinking coils

[hoveringuy]

What's the best way to get these? Are they just pulled from parts ECU's?

And am I right that, to run sequential injection, you'd need 6 of these, 1 per coil, mounted on some kind of metal material for heat transfer?

I harvested them from the 413 ecu. I would guess that any COP ECU has them. A $20 Jap igniter from the junk yard would be a good way to go for you.

[Elysian]

I harvested them from the 413 ecu. I would guess that any COP ECU has them. A $20 Jap igniter from the junk yard would be a good way to go for you.

I just opened my M54's stock DME:



Could these be used? They look a little different, they don't use the center pin but they look to be grounded to the board itself, perhaps ground goes through the back on these?

[hoveringuy]

Could these be used? They look a little different, they don't use the center pin but they look to be grounded to the board itself, perhaps ground goes through the back on these?

Those would work fine. Those boards have 4 layers, the middle two layers are usually power and ground so you can't see where they are grounded together. With a multimeter see which pins have continuity with each other and ground. See which pins (left, middle or right) have continuity with pins on the connector. Those are your outputs.

[Elysian]

Will do. Appreciate all the hand holding

My sister still lives up in Washington, so if/when I'm ever up in the area I'll be sure to buy you a beer or something :p

[Elysian]

Here's what I got measuring resistance with corresponding pins:



3rd terminal went to ground pin(pin 5), the back plate terminal went to the individual coil output pins and I'm assuming the other pin is the signal from the ECU. Does this sound feasable? And would these drivers need a backing plate of some sort for heat absorption? Doesn't seem like the stock DME has much of that...

[nando]

generally yes you want them heatsinked. I think the stock ECU uses the part that the back solders onto as it's heat sink.

[Elysian]

The middle pin that's unused and the backing metal connector have almost no resistance, I'm guessing the middle pin can be used as the coil out as well... How would I mount these to a heatsink when the coil out is the metal backing plate and there's no screw holes like on the ones inside the Megasquirt?

I can't even figure out how to get them OFF of the board I guess I need to find some sort of heat gun.

[nando]

they make thermal heatsink tape just for this, try a computer/modding site.

they are soldered on, you'll have to unsolder them..

personally I'd just buy a set of BIP's and be done with it. :p