New ITB's and EDIS system on my 911sc

[JSZ]

Many of you know I acquired this 911 in early 2017, and started systematically restoring pieces and components on it. I was never really happy with the CIS injection, I had 95% of the bugs worked out of it, it drove and started well. However it was butt ugly when you opened the rear tin and was a witch, ( with a B), to work on anything, I resorted to dropping it for any work items. It also had marginal performance and etc.
Late last year I decided to upgrade to ITB's and an EDIS system. Al, from the X Faktory, helped me out with acquiring the kit and components and I started that journey in late December of installing.
Install of the components was fairly straight forward, including wiring and locating new systems. Al, would always provide advice and help when I asked for it. I was pretty certain, i would need assistance with the programming and had some folks offer to assist me.
During the process, I backdated the heat system, choosing to build them and other steel and aluminum components required for the ITB install. All went very well and had the engine installed and then COVID hit. I lost some of my support I had locally, however others stepped forward to help and advise. A big shout out to Evan, for advice rendered.

I have just completed the initial tune, ( with help) and have put over 150 miles on the car, enjoying it and debugging small issues, unrelated to the ITB's. Boy, I dont miss that CIS system, the car absolutely out performs the CIS injection with the ITB's and so much nicer to work on and open the tin and look at. Have a little more clean up tuning I intend to have done on a dyno this fall, but until then, I am certainly going to enjoy it.
Thank you to all the folks who stepped up to help, could not have done it with out the advice and support.
A few photos of my ITB insatll from removing the engine, component install, heat back date and reinstall.

Thanks,Jeff

[rwest]

Nice work Jeff,

I have a set of PMOs and EDIS ignition from Al sitting on my bench! I’m going to start the install in the next week or two.

Best,
Rutager

[icarp]

Well done Jeff, Looks tidy.
Ian

[tirwin]

Originally Posted by rwest

Nice work Jeff,

I have a set of PMOs and EDIS ignition from Al sitting on my bench! I’m going to start the install in the next week or two.

Best,
Rutager

Me too!

Looks great. Glad to hear you’re happy with it.

[Knockdown]

Nice work! I’ve had mine up and running for over a year now, very glad I did it.

[Larmo63]

What are the associated costs on this install if you don't mind me asking?

[Gretz]

Looks great! I am planning on doing the same with mine in the not too distant future. Can you please give us an inventory of components you selected?

[chrismorse]

Originally Posted by tirwin

Me too!

Looks great. Glad to hear you’re happy with it.

Hi Tim,
Me too. I’ve just installed Al’s PMO, ITB set up on my 74 and installed the MS2 box in the car. I’m working through the location and mounting the EDIS components and the EFI sensors and wiring, as we speak. This is slowed by having to earn the daily bread.

I also keep running into rust, old wiring that needed replacement and sliding further down the slippery slope,

Hope your install moves a bit more quickly. I’m interested in how you work out where and how to locate the bits and pieces.

Cheers,
Chris

[JSZ]

Originally Posted by chrismorse

Hi Tim,
Me too. I’ve just installed Al’s PMO, ITB set up on my 74 and installed the MS2 box in the car. I’m working through the location and mounting the EDIS components and the EFI sensors and wiring, as we speak. This is slowed by having to earn the daily bread.

I also keep running into rust, old wiring that needed replacement and sliding further down the slippery slope,

Hope your install moves a bit more quickly. I’m interested in how you work out where and how to locate the bits and pieces.

Cheers,
Chris

Since I started the thread and have just completed the build, I will share where I located key components.
Megasquirt computer, I located where the existing computer was located under the front passenger seat. This required making a custom aluminum mounting plate.
Relay, terminal block and fuse panel, was added to the existing Porsche panel on the left rear of the engine bay. I removed the OEM fuel filter and accessories and located the panel in that area. Also, it used a custom aluminum base plate to allow mounting of the new components.
The EDIS, coil packs and fuel pressure regulator were located on the top shock mounting cross member. This also was a custom fabricated mounting plate.
All of the mounting hardware is stainless on the new aluminum base plates.
A few things I ran into, I will share is, get rid of the megasquirt plastic wire harness. I had installed it and found it was difficult to secure, squeaked and difficult to make bends. I removed that and split my wiring into two pieces and installed a fiberglass/polyester wrap and heat shrink and the end points. Flexible and looks very professional.
I built templates for the relay setup to insure I had enough space to allow for the components to have mounting space and clearance space for wiring and ties and etc.
I chose to remove the engine, so I had ample room to run the harness and pull new fuel lines. I know Al sometimes does his install in the car, but for me the preferred method was getting it out of the way. It also helped installing the throttle bodies and manifolds, since they had very little clearance for sockets or wrenches.

I think I can find some better pictures if needed, but these are fairly representative.

Hope this helps with your install. Jeff

[chrismorse]

Hi Jeff,
Nice looking install. I will be running the same components.
Did you tuck the map vacuum hose into the new harness?
Where did you source the loom wrap?
Did you solder, crimp - or both?
Any issues along the way? Anything you’d do differently?
Chris

[al lkosmal]

Jeff,
Congratulations on the install. Very tidy, with excellent results. I'm glad that it worked out so well and that you are on the road. Your attention to detail and willingness to roll up your sleeves and get in there shows what can be done with a DIY attitude and skillset.

regards,
al

[tirwin]

Originally Posted by chrismorse

Hi Tim,
Me too. I’ve just installed Al’s PMO, ITB set up on my 74 and installed the MS2 box in the car. I’m working through the location and mounting the EDIS components and the EFI sensors and wiring, as we speak. This is slowed by having to earn the daily bread.

I also keep running into rust, old wiring that needed replacement and sliding further down the slippery slope,

Hope your install moves a bit more quickly. I’m interested in how you work out where and how to locate the bits and pieces.

Cheers,
Chris

Work gets in the way so much. Before the ‘rona I travelled a lot so that always slowed my progress.

I had other stuff on the car I had to do first. I’m going with headers and new muffler so that means heat backdate and reroute oil lines. Oil return tubes need to be replaced. So do the trailing arm bushings.... I can’t believe I’m saying this, but I took the car to a local indy P-car shop to do all that just to get it over with.

Now they want to do the ITB/EFI setup. Most of their business comes from race pre and ain’t nobody racing right now. I’m on the fence as to what to do. I want to do the work myself because I enjoy it. We’ll see.

I finally scored a TL gear with Grant’s help, so I kinda want to pull the motor and swap that out too.

So, yea, no idea on the details yet. Hoping the kit is here next week. I’m doing COP with MS and PMOs.

Once I have the kit in front of me I’m sure I’ll have some questions.

Glad to see others are doing this so we can share info.

[3rd_gear_Ted]

Originally Posted by JSZ

Since I started the thread and have just completed the build, I will share where I located key components.
Megasquirt computer, I located where the existing computer was located under the front passenger seat. This required making a custom aluminum mounting plate.
Relay, terminal block and fuse panel, was added to the existing Porsche panel on the left rear of the engine bay. I removed the OEM fuel filter and accessories and located the panel in that area. Also, it used a custom aluminum base plate to allow mounting of the new components.
The EDIS, coil packs and fuel pressure regulator were located on the top shock mounting cross member. This also was a custom fabricated mounting plate.
All of the mounting hardware is stainless on the new aluminum base plates.
A few things I ran into, I will share is, get rid of the megasquirt plastic wire harness. I had installed it and found it was difficult to secure, squeaked and difficult to make bends. I removed that and split my wiring into two pieces and installed a fiberglass/polyester wrap and heat shrink and the end points. Flexible and looks very professional.
I built templates for the relay setup to insure I had enough space to allow for the components to have mounting space and clearance space for wiring and ties and etc.
I chose to remove the engine, so I had ample room to run the harness and pull new fuel lines. I know Al sometimes does his install in the car, but for me the preferred method was getting it out of the way. It also helped installing the throttle bodies and manifolds, since they had very little clearance for sockets or wrenches.

I think I can find some better pictures if needed, but these are fairly representative.

Hope this helps with your install. Jeff

Good on you for mounting the coil packs off that engine vibrating @ 6000 rpm

[JSZ]

Originally Posted by chrismorse

Hi Jeff,
Nice looking install. I will be running the same components.
Did you tuck the map vacuum hose into the new harness?
Where did you source the loom wrap?
Did you solder, crimp - or both?
Any issues along the way? Anything you’d do differently?
Chris

Chris, the MAP vacuum line I ran parallel to the Megasquirt wiring harness, through the fire wall and the up the center of the tunnel and through an existing hole in the engine sheet metal. The Megasquirt wiring essentially followed the existing wire path and the fuel lines popping up in the left front quadrant of the engine bay. I can take a couple of photos of my MAP routing that I can get at, if you need them.

I have to look up the loom information, it was a split loom commonly available on Ebay, Digi-Key and others. I found splitting the harness into two distinct wiring harnesses aided in the install and neatness. I actually had the corrugated plastic harness all wired and then tore it out to redo, just did not look right.

I crimped and soldered everything I did, and heat shrinked them also.

Most the issues for me were understanding the programming, all other things were easily manageable. I still have a little throttle linkage geometry to work out, easy for me, just am enjoying it more then working on it in the last few days. You will do a few things during install that are not quite right which will require additional time and advice and redo. I certainly had my share.

Hope this helps, Jeff

[BoxsterGT]

Nice job Jeff. You will be very happy you have done this.

My apologies for going off topic. I am wondering if you have any CIS parts left over from your old system.

I am having good luck Re-Making CIS Fuel Lines when the get damaged for one reason or another, and often need the metal CIS fittings.

I would be happy to buy whatever you have.

If any are available, please reply by email.

Thanks in advance.

Len.Cummings at verizon.net

[JSZ]

Originally Posted by BoxsterGT

Nice job Jeff. You will be very happy you have done this.

My apologies for going off topic. I am wondering if you have any CIS parts left over from your old system.

I am having good luck Re-Making CIS Fuel Lines when the get damaged for one reason or another, and often need the metal CIS fittings.

I would be happy to buy whatever you have.

If any are available, please reply by email.

Thanks in advance.

Len.Cummings at verizon.net

Hello Len, normally I would surplus ex-used parts to others, however I have carefully packaged all of the original components for the future owner, if he/she would like to restore back to OEM.

Wish I could help, Jeff

[dap930]

Jeff,

Congrats on your ITB/Megasquirt EFI conversion. I know there is a noticeable difference in the way the engine responds. Enjoy!

[Phillip_G]

Jeff, Thanks for posting the EDIS install info. I have also installed an X-faktory EFI kit on my '74 a few months ago and have it running great, but now am ready to move forward with EDIS and have been gathering parts. I'm just about ready to do the install and had a couple of questions.

What coil pack and plug wire set did you use? Is that the DIYAutotune IGN-6?

Also, in the photo it looks like the coil is set up to fire center-right-left. Do you recall which EDIS pins (10,11,12) go to which pins on the coil pack? Again looking at your photo I believe the lower left pin would be the 12v.

Thanks,

Phil G

[merlinfe]

Jeff,

Did you have any trouble setting the initial timing with the MS2? I ask because I started a project like this a long time ago but I got hung up on syncing the Megasquirt and EDIS. I was also having an issue where the EDIS was stuck at 10* BTDC.

Great looking install! Hopefully 2021 has a lot of miles in store for you.

-Steve

[al lkosmal]

Jeff,
Just ran across this thread again.... Nice work.....!!
regards,
al