Stand alone ECU for SC turbo?

[Geronimo]

So I am starting to gather a list to start picking off parts, one area that I don't have narrowed down is the ECU.

I'll be running a 3.2 intake on my 3L, so I will need a fairly complete kit

What do people recommend and why?

[scottrx7tt]

i use microsquirt and have had great luck out of it. It does everything i need it to do at a low cost. I am also running a 3.2 intake on my 3L. If you are wanting to control spark, you will need some additional items. I run EDIS and it is rock solid and super cheap.

[TurboKraft]

Motec M130
Link G4+
AEM Infinity 506

or Megasquirt (ex: AMP EFI) if you're fully DIY and want to figure it all out yourself.

[flightlead404]

Originally Posted by scottrx7tt

i use microsquirt and have had great luck out of it. It does everything i need it to do at a low cost. I am also running a 3.2 intake on my 3L. If you are wanting to control spark, you will need some additional items. I run EDIS and it is rock solid and super cheap.

Microsquirt works great for me and is fully functional for a little price in a nice package.

The only thing I can think of that it won't do is fully sequential ignition for a 6 banger, but it will do wasted spark just fine. I've converted my ignition to a crank fire with a 60-2 flywheel (I'd do 30-1 if I did it again) with Denso COP's and it works great.

I see absolutely no reason to spend the big $ or the complexity unless you're building a race motor that far exceeds my capability or requirements.

[Geronimo]

Yea, I know the MS systems are very popular, and tend to offer 9/10th the options for 1/10th the price.

I have thought that while switching to the 3.2 intake that I might look at switching to a COP ignition.

My thoughts were to get the 3.2 intake and stand alone on and working before add a turbo to minimize tuning variables.

[TurboKraft]

COP ignition is easy, we have Denso smart coils (built-in ignitor) that fit great on the 911.

[dos531]

I think Rasant makes a pretty bolt on efi kit, if thats your biggest concern. Otherwise, the MS3pro is great bang for buck. Not very difficult to set up especially on the 3.2 manifold. I would recommend the turbokraft tps sensor kit, as well as their cht sensor kit to make things simpler. I believe the ports will be smaller on the 3.0 heads as well so you will probably need the adapters from them too.

You can check out my old spreadsheet from my efi conversion which lists all the sensors and parts I used for the swap. That was before the carrera manifold so not everything would be applicable.
https://onedrive.live.com/view.aspx?resid=89033EA9FB01D9A0!911&ithint=file%2cxlsx&authkey=!AF3xZ4TG0wXhxq0

I do sell the megasquirt products now so if you decide to go that route let me know and I can get you a deal.

[Drbraunsr]

Lots of good options. Unless you're an EFI expert, I'd recommend finding a tuner you trust (and gives good support) and run that system.

TurboKraft is superb. Clewett Engineering is another...

[Dr J]

Don’t forget the wiring! I went with Rasant and got his wiring harness. Even had it customized for me (for a price).

[Geronimo]

DOS awesome speadsheet!

Rasant looks nice, but with options like MS they are just way to high of a cost per value for what I would need.

[spuggy]

Motec is a really good ECU system (even the older "gold" boxes), and there's lots of info on their forums (much of which is applicable to tuning almost any/all EFI systems). If you want support, it's probably more important to use a system that your wrench/tuner is comfortable with.

If you'll do it all from scratch yourself, it probably doesn't much matter

I'd probably try VEMS if I were doing it over. Everything for Motec is spendy. But it works well.

The Cayenne COPs were developed by Beru, in conjunction with Porsche/to their specs, with one stated aim being of particular interest to me:

at least 25 % higher spark energy and spark duration compared to the current sports-car ignition coil

They're 15% lighter too... (lol)

They (Beru) wrote an article about the development/testing (250Km "cold weather" testing, 250K "hot weather" testing and 30Km "sand testing", with a total of 5.5 million Km driven in testing), but I don't see it on-line anywhere now (the filename was 'fachaufsatz_zsp_en.pdf'). PM if anyone wants it.

They also used them on the Turbo Cayenne and the Carrera GT.

I've got 12 of 'em firing W3DPOs; seems to get the job done..

[flightlead404]

Originally Posted by Geronimo

Yea, I know the MS systems are very popular, and tend to offer 9/10th the options for 1/10th the price.

I have thought that while switching to the 3.2 intake that I might look at switching to a COP ignition.

My thoughts were to get the 3.2 intake and stand alone on and working before add a turbo to minimize tuning variables.

I used these Denso 6731301 and very happy.

Make sure to get the Turbokraft COP hold down clips. I found they needed a little massaging on the bends, but hold downs of some sort are definitely needed.

Hang on to the old harness, you'll want to whack off (rawknees!) 6" or so and make an adapter so you can put an inductive timing light on to measure your angle offset when setting the ignition timing.

[flightlead404]

Originally Posted by Dr J

Don’t forget the wiring! I went with Rasant and got his wiring harness. Even had it customized for me (for a price).

I'm a bit of a wiring nerd but I enjoyed making a professional looking harness up myself and its really not that hard.

I sourced a lot of the automotive connectors from Ballard motorsports and used MILSPEC Tefzel wiring from prowireusa. Very happy with it.

[clutch-monkey]

I’ve got a haltech in my n/a 911, an adaptronic in my Gtr, and an autronic in another 911

All work ok, pros and cons for all but they do the same basic job

[moty]

i use M48 with expender - i dont have distributor at all
its need a lot of tuning - but the result is good

[flightlead404]

Originally Posted by scottrx7tt

i use microsquirt and have had great luck out of it. It does everything i need it to do at a low cost. I am also running a 3.2 intake on my 3L. If you are wanting to control spark, you will need some additional items. I run EDIS and it is rock solid and super cheap.

I just re-read this post.

You don't need to go to the extra expense and effort of EDIS not to mention figure out mounting if you have the ability to install a crank position sensor. This is easy to do at the rear pulley, or what I did, have the edge of the flywheel cut for 30-1 teeth and use the already in place bosses to mount a stock Bosch sensor.

Then you can ditch the distributor, plug the hole, and have a nice setup.

Note: You will need to cut a small clearance divot in the transmission bell housing, which is a piece of cake with an angle grinder.

[patkeefe]

I use an SDS system in my turbo 3.0; ignition and EFI. It is pretty simple, once it's dialed in.

[JakobM]

Maxxecu - Race / pro
VEMS
Ecumaster - Black

[Pat RUFBTR]

Originally Posted by spuggy

Motec is a really good ECU system (even the older "gold" boxes), and there's lots of info on their forums (much of which is applicable to tuning almost any/all EFI systems). If you want support, it's probably more important to use a system that your wrench/tuner is comfortable with.

If you'll do it all from scratch yourself, it probably doesn't much matter

I'd probably try VEMS if I were doing it over. Everything for Motec is spendy. But it works well.

The Cayenne COPs were developed by Beru, in conjunction with Porsche/to their specs, with one stated aim being of particular interest to me:

They're 15% lighter too... (lol)

They (Beru) wrote an article about the development/testing (250Km "cold weather" testing, 250K "hot weather" testing and 30Km "sand testing", with a total of 5.5 million Km driven in testing), but I don't see it on-line anywhere now (the filename was 'fachaufsatz_zsp_en.pdf'). PM if anyone wants it.

They also used them on the Turbo Cayenne and the Carrera GT.

I've got 12 of 'em firing W3DPOs; seems to get the job done..

Hi, do you have a reference from the Cayenne Turbo Beru, please?

[Peter M]

Originally Posted by Geronimo

So I am starting to gather a list to start picking off parts, one area that I don't have narrowed down is the ECU.

I'll be running a 3.2 intake on my 3L, so I will need a fairly complete kit

What do people recommend and why?

Geronimo,

What I learnt with my build is to carefully decide what you want before you do anything. This will save you time and money.

Do you want DBW?
Do you want cruise control?
Knock sensors?
Wasted spark OK?
etc.

Also as others have said, decide on your tuner and they will probably make the decision for you!