3,0 SC with EFI system - Which ignition system to choose - any ideas ?

[Roslin]

The reason for me to go with EFI, is that i'm not happy about CIS during the warm up period, and i feel that the engine compartment is a mess with CIS - ok the last thing is only an optical thing - How it looks do also have it's right in all this :-) ?

But most important in the first place, is that i will get a fully programable system, that can be really fine tuned, and at the same time is a good basis for my further thoughts about - raised CR. 964 cams , twin plugs and perhaps 98mm cylinders if the budget will last when i get so far !

First, i will get the engine running with the EFI and what ever ignition (learn about it ) , before any deeper hardware change to the engine will happen.

[timmy2]

timmy2, wasn't trying to slam your EFI deal as I'm sure your still tuning it as you go. It is a superior system in every way if one has the coin. I would've guessed higher MPG before and after EFI though.



Also, my CIS mileage figures are not what most guys can get due to altitude giving better MPGs. I'm usually between 5200-9000ft.

I was just clarifying what looked like a loss in MPG from the post you made.
(I bought my system used, so I'm into it for a lot less, I posted the new price for reference)
Very easy to spend $2k on all new CIS components if you can find them...
I have the ability now to expand to ignition/timing control with the Megasquirt and may go down that road some day. ITB's are another option! Spent a few hours drooling over Rothsport's system a couple of weeks ago.

I'm down a lot closer to sea level here in western Oregon.
Usually around 400-700 ft.
The original mpg rating for my '78 was 18mpg and that was probably optimistic back in the day!

[K Sykes]

I went through a similar process. I bought the TBitz kit about 5 years ago and did fuel only for a while. Upgraded it to MS 2 to be able to do an Idle Air valve and get rid of my AAR to help cold starts. Turned out that I had trashed exhaust valves and guides. So, while the EFI was a real improvement, I had mechanical issues that were keeping me from getting to the next level. I decided to drop the engine and do a top end rebuild. I took advantage of the engine being out to add a trigger wheel and hit the local junkyard to get Ford EDIS parts which provides an ignition module, coil pack and a VR sensor that is an easy add to MS2 Extra. I also upgraded my cams. The car is totally transformed and I don't have what I consider to be a real good tune yet. It's a long process working through the MS manuals and forums to figure out everything, but the view is worth the climb.

As soon as my schedule permits, I will spend an afternoon on the dyno with a guy who knows tuning and Porsches and get it fully done.

[timmy2]

K Sykes,
What idle air valve did you use? I wouldn't mind tossing the AAR as well....

[sjf911]

I've used the original AAR, a GM stepper with a Clewett 3.2 adapter, and the 3.2 OEM 3-wire Bosch. The AAR was more predictable than the GM stepper but the 3-wire OEM gives the best performance although requires an add-on board for MSII to control. It is also the cleanest install with the 3.2 manifold.

[al lkosmal]

MegaSquirt-II EMS System - SMD PCB3.57 w/ Black Case DIYAutoTune.com

This is my M'squirt of choice. I buy them fully assembled and tested from DIY Autotune. They are knowledgeable and helpful. Should meet your requirements and this surface mount version is, to my mind, a better choice for auto (vibrationnnnnn) apps.

dig in and have fun with the project

koz77911's channel - YouTube

regards,
Al

[K Sykes]

Originally Posted by timmy2

K Sykes,
What idle air valve did you use? I wouldn't mind tossing the AAR as well....

I used the DIY Autotune machined block which fits a jeep Cherokee IAC. Think the part # is listed on their site. Need to solder 4 jumpers to energize and run it. Specific wiring is in the manual. Need to have at least an MS2.

[mytoy]

Originally Posted by sjf911

I've used the original AAR, a GM stepper with a Clewett 3.2 adapter, and the 3.2 OEM 3-wire Bosch. The AAR was more predictable than the GM stepper but the 3-wire OEM gives the best performance although requires an add-on board for MSII to control. It is also the cleanest install with the 3.2 manifold.

sjf911 which add on board and where did you get it? Also do you mind if I pm you about tunes.

[sjf911]

Originally Posted by mytoy

sjf911 which add on board and where did you get it? Also do you mind if I pm you about tunes.

Glen's Garage sells the board to adapt the 3-wire to the FIDLE output of the MSII.

Glen's Garage

You can also control a 3-wire valve with "external" modifications:



MS2-Extra Hardware Manual

Feel free to PM me, I'll be happy to help in anyway I can.

[Mr Project]

Originally Posted by sjf911

Glen's Garage sells the board to adapt the 3-wire to the FIDLE output of the MSII.

He actually hasn't sold these for a few years, and it took me several attempts to order from him or contact him to learn this. Wasted several weeks on this back when I was doing an MSII install on my BMW (I was using the same Motronic 3-wire idle valve).

You can certainly build his circuit and use it. I built mine into the gutted base of the GM 3-coil ignition module I used for the wasted spark install. Good heat sink available and didn't have to add another small box anywhere.

[sjf911]

Originally Posted by Mr Project

He actually hasn't sold these for a few years, and it took me several attempts to order from him or contact him to learn this. Wasted several weeks on this back when I was doing an MSII install on my BMW (I was using the same Motronic 3-wire idle valve).

You can certainly build his circuit and use it. I built mine into the gutted base of the GM 3-coil ignition module I used for the wasted spark install. Good heat sink available and didn't have to add another small box anywhere.

Interesting, it's still in his menu for sale.

[K Sykes]

There's a long thread on the MSExtra forum about Glenn's Garage. Unclear if he is still in business or not. Lot's of unhappy people.