New guy, new build

With Turbo and Super charging you can create massive horsepower with vw motors.

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Piledriver
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Re: New guy, new build

Post by Piledriver » Thu Apr 20, 2017 1:23 pm

Yes, it does... In reality it depends on the coils desires.
The 1K provides a little more current.

LS2 coils usually work fine with the 4.7K.
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chriswillrise
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Re: New guy, new build

Post by chriswillrise » Thu Apr 20, 2017 5:35 pm

Piledriver wrote:
Thu Apr 20, 2017 1:23 pm
LS2 coils usually work fine with the 4.7K.
what about the vw coil? thats what ill be running. My friends parts dealer has 3 options for the coil ranging in price so ill probably try the middle ground one at 35 bucks. the lowest one is 18 but he said he has had bad luck with them crapping out

and can you use open element IAT sensor if they will be exposed to gas and water/meth

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Re: New guy, new build

Post by Piledriver » Fri Apr 21, 2017 1:53 am

1) You may need to use a 270-330 ohm resistor for the pullup--- It depends on the coil. Really.
I'd try 1K first on the bench... Swapping those pullup resistors is fast/easy.

Do NOT pullup to 12v, the processor may die instantly if anything is not right.

I suggest reading http://www.msextra.com/forums/viewtopic ... l&start=20
or "how to test the dwell polarity is right without letting the magic blue smoke out of the coil"
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Re: New guy, new build

Post by chriswillrise » Wed Apr 26, 2017 10:29 pm

where do you guys buy the circuit board components. I need a TC4427AEPA dual mosfet chip and diyautotune doesnt have them on the site.

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Re: New guy, new build

Post by Piledriver » Wed Apr 26, 2017 11:12 pm

Digikey, usually.
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Chip Birks
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Re: New guy, new build

Post by Chip Birks » Thu Apr 27, 2017 9:32 am

Mouser.com

chriswillrise
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Re: New guy, new build

Post by chriswillrise » Wed May 03, 2017 7:29 pm

Just got my second coil driver and boost control kit. So the computer should be 100% tonight. Now to buy some sensors and a harness (and hope everything works)

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Re: New guy, new build

Post by panel » Thu May 04, 2017 9:01 pm

Ditto.
Piledriver wrote:
Wed Apr 26, 2017 11:12 pm
Digikey, usually.

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Re: New guy, new build

Post by Piledriver » Thu May 04, 2017 11:12 pm

Mouser is local to me...and have bought stuff from them.

Digi-key usually has a much better selection, price, faster shipping, and no minimum order.

I would still strongly encourage putting those coil drivers in another box by the coils, rather than in the ECU, or use "logic" coils.
Intentionally putting a huge high power electric noise source INSIDE your ECU always baffled me.

Note the MS3+MS3X/MS3-super-ultimate/pro-setup-of-the-day/microsquirts and all their children are made logic out for coils.
It's not an accident.
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Re: New guy, new build

Post by chriswillrise » Fri May 05, 2017 5:45 pm

Piledriver wrote:
Thu May 04, 2017 11:12 pm
Mouser is local to me...and have bought stuff from them.

Digi-key usually has a much better selection, price, faster shipping, and no minimum order.

I would still strongly encourage putting those coil drivers in another box by the coils, rather than in the ECU, or use "logic" coils.
Intentionally putting a huge high power electric noise source INSIDE your ECU always baffled me.

Note the MS3+MS3X/MS3-super-ultimate/pro-setup-of-the-day/microsquirts and all their children are made logic out for coils.
It's not an accident.
I was talking to mario and he convinced me to use the standard wasted spark set up. He said that anytime he sets up an ecu he uses the 2 coil drivers for wasted spark and never has issues. So I will try that and see what happens. I think chip uses 4 drivers inside the box for sequential and doenst have any issues either IIRC. But I do see your point.

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Re: New guy, new build

Post by petew » Fri May 05, 2017 7:59 pm

Wasted spark is more than good enough for most of what we're doing. It's also incredibly hard to screw up. 2 output wires to the coil drivers. Get them the wrong way round and the motor won't run (don't ask how I know this). Get it right and it runs straight up. Another curious thing I found out the other day. Even modern ECUs using cam sensors/coil-on-plug to individually time/fire specific cylinders are still running a wasted spark on a paired cylinder.

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Re: New guy, new build

Post by Chip Birks » Sat May 06, 2017 12:09 am

chriswillrise wrote:
Fri May 05, 2017 5:45 pm
I think chip uses 4 drivers inside the box for sequential and doenst have any issues either IIRC. But I do see your point.
Nah, i think i might have initially planned to go that route, then i built my own driver box, which eventually had an issue, so i bought a quad spark and called it done. I currently have 4 Ign-1a coils sitting in boxes waiting their turn to go on the project though...

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Re: New guy, new build

Post by Piledriver » Sat May 06, 2017 3:17 am

I tend to lean very paranoid when it comes to avoiding electronic noise.
Comes from (largely) fixing electronic noise issues for the last 30+ years for a living. :lol:

Tip: If there is a way you can avoid it, or even reduce it, do it THAT way.
Noise does truly random poop that's hard to find, much less fix. Avoid at all costs.

The first MS2 setup I built had the ignition AND 4 low Z injector drivers in a second box on the other side of the car, with its own "high power" harness running down that side away from the sensors harness... Worked peachy, and I'd do it again if the MS3X and LS2 coils didn't have it handled..
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Re: New guy, new build

Post by chriswillrise » Wed May 10, 2017 10:13 pm

can i use my msd plug wires for my wasted spark set up, or will they not work because of low resistance

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Re: New guy, new build

Post by Clonebug » Wed May 10, 2017 11:30 pm

I would think so but I'm not 100% sure.

I use stock EDIS plug wires I grabbed off a 97 Ford F150 truck since I still use the EDIS coil only.

I just run resistor plugs.
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